diff --git a/.gitignore b/.gitignore
index 14050d4e4..d4f03a0df 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,4 +12,3 @@ system-test/*key.json
 .DS_Store
 package-lock.json
 __pycache__
-.vscode
\ No newline at end of file
diff --git a/protos/google/spanner/admin/instance/v1/common.proto b/protos/google/spanner/admin/instance/v1/common.proto
index 075b45fea..69717ec22 100644
--- a/protos/google/spanner/admin/instance/v1/common.proto
+++ b/protos/google/spanner/admin/instance/v1/common.proto
@@ -16,6 +16,7 @@ syntax = "proto3";
 
 package google.spanner.admin.instance.v1;
 
+import "google/api/field_behavior.proto";
 import "google/protobuf/timestamp.proto";
 
 option csharp_namespace = "Google.Cloud.Spanner.Admin.Instance.V1";
@@ -54,3 +55,9 @@ enum FulfillmentPeriod {
   // to complete.
   FULFILLMENT_PERIOD_EXTENDED = 2;
 }
+
+// ReplicaSelection identifies replicas with common properties.
+message ReplicaSelection {
+  // Required. Name of the location of the replicas (e.g., "us-central1").
+  string location = 1 [(google.api.field_behavior) = REQUIRED];
+}
diff --git a/protos/google/spanner/admin/instance/v1/spanner_instance_admin.proto b/protos/google/spanner/admin/instance/v1/spanner_instance_admin.proto
index b8c49260a..ba6726b31 100644
--- a/protos/google/spanner/admin/instance/v1/spanner_instance_admin.proto
+++ b/protos/google/spanner/admin/instance/v1/spanner_instance_admin.proto
@@ -803,6 +803,34 @@ message InstanceConfig {
   State state = 11 [(google.api.field_behavior) = OUTPUT_ONLY];
 }
 
+// ReplicaComputeCapacity describes the amount of server resources that are
+// allocated to each replica identified by the replica selection.
+message ReplicaComputeCapacity {
+  // Required. Identifies replicas by specified properties.
+  // All replicas in the selection have the same amount of compute capacity.
+  ReplicaSelection replica_selection = 1
+      [(google.api.field_behavior) = REQUIRED];
+
+  // Compute capacity allocated to each replica identified by the specified
+  // selection.
+  // The unit is selected based on the unit used to specify the instance size
+  // for non-autoscaling instances, or the unit used in autoscaling limit for
+  // autoscaling instances.
+  oneof compute_capacity {
+    // The number of nodes allocated to each replica.
+    //
+    // This may be zero in API responses for instances that are not yet in
+    // state `READY`.
+    int32 node_count = 2;
+
+    // The number of processing units allocated to each replica.
+    //
+    // This may be zero in API responses for instances that are not yet in
+    // state `READY`.
+    int32 processing_units = 3;
+  }
+}
+
 // Autoscaling configuration for an instance.
 message AutoscalingConfig {
   // The autoscaling limits for the instance. Users can define the minimum and
@@ -854,6 +882,37 @@ message AutoscalingConfig {
         [(google.api.field_behavior) = REQUIRED];
   }
 
+  // AsymmetricAutoscalingOption specifies the scaling of replicas identified by
+  // the given selection.
+  message AsymmetricAutoscalingOption {
+    // Overrides the top-level autoscaling configuration for the replicas
+    // identified by `replica_selection`. All fields in this message are
+    // optional. Any unspecified fields will use the corresponding values from
+    // the top-level autoscaling configuration.
+    message AutoscalingConfigOverrides {
+      // Optional. If specified, overrides the min/max limit in the top-level
+      // autoscaling configuration for the selected replicas.
+      AutoscalingLimits autoscaling_limits = 1
+          [(google.api.field_behavior) = OPTIONAL];
+
+      // Optional. If specified, overrides the autoscaling target
+      // high_priority_cpu_utilization_percent in the top-level autoscaling
+      // configuration for the selected replicas.
+      int32 autoscaling_target_high_priority_cpu_utilization_percent = 2
+          [(google.api.field_behavior) = OPTIONAL];
+    }
+
+    // Required. Selects the replicas to which this AsymmetricAutoscalingOption
+    // applies. Only read-only replicas are supported.
+    ReplicaSelection replica_selection = 1
+        [(google.api.field_behavior) = REQUIRED];
+
+    // Optional. Overrides applied to the top-level autoscaling configuration
+    // for the selected replicas.
+    AutoscalingConfigOverrides overrides = 2
+        [(google.api.field_behavior) = OPTIONAL];
+  }
+
   // Required. Autoscaling limits for an instance.
   AutoscalingLimits autoscaling_limits = 1
       [(google.api.field_behavior) = REQUIRED];
@@ -861,6 +920,18 @@ message AutoscalingConfig {
   // Required. The autoscaling targets for an instance.
   AutoscalingTargets autoscaling_targets = 2
       [(google.api.field_behavior) = REQUIRED];
+
+  // Optional. Optional asymmetric autoscaling options.
+  // Replicas matching the replica selection criteria will be autoscaled
+  // independently from other replicas. The autoscaler will scale the replicas
+  // based on the utilization of replicas identified by the replica selection.
+  // Replica selections should not overlap with each other.
+  //
+  // Other replicas (those do not match any replica selection) will be
+  // autoscaled together and will have the same compute capacity allocated to
+  // them.
+  repeated AsymmetricAutoscalingOption asymmetric_autoscaling_options = 3
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // An isolated set of Cloud Spanner resources on which databases can be hosted.
@@ -901,6 +972,24 @@ message Instance {
     ENTERPRISE_PLUS = 3;
   }
 
+  // Indicates the default backup behavior for new databases within the
+  // instance.
+  enum DefaultBackupScheduleType {
+    // Not specified.
+    DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED = 0;
+
+    // No default backup schedule will be created automatically on creation of a
+    // database within the instance.
+    NONE = 1;
+
+    // A default backup schedule will be created automatically on creation of a
+    // database within the instance. The default backup schedule creates a full
+    // backup every 24 hours and retains the backup for a period of 7 days. Once
+    // created, the default backup schedule can be edited/deleted similar to any
+    // other backup schedule.
+    AUTOMATIC = 2;
+  }
+
   // Required. A unique identifier for the instance, which cannot be changed
   // after the instance is created. Values are of the form
   // `projects/<project>/instances/[a-z][-a-z0-9]*[a-z0-9]`. The final
@@ -922,34 +1011,56 @@ message Instance {
   // Must be unique per project and between 4 and 30 characters in length.
   string display_name = 3 [(google.api.field_behavior) = REQUIRED];
 
-  // The number of nodes allocated to this instance. At most one of either
-  // node_count or processing_units should be present in the message.
+  // The number of nodes allocated to this instance. At most, one of either
+  // `node_count` or `processing_units` should be present in the message.
   //
-  // Users can set the node_count field to specify the target number of nodes
+  // Users can set the `node_count` field to specify the target number of nodes
   // allocated to the instance.
   //
-  // This may be zero in API responses for instances that are not yet in state
-  // `READY`.
+  // If autoscaling is enabled, `node_count` is treated as an `OUTPUT_ONLY`
+  // field and reflects the current number of nodes allocated to the instance.
   //
-  // See [the
-  // documentation](https://cloud.google.com/spanner/docs/compute-capacity)
-  // for more information about nodes and processing units.
+  // This might be zero in API responses for instances that are not yet in the
+  // `READY` state.
+  //
+  // If the instance has varying node count across replicas (achieved by
+  // setting asymmetric_autoscaling_options in autoscaling config), the
+  // node_count here is the maximum node count across all replicas.
+  //
+  // For more information, see
+  // [Compute capacity, nodes, and processing
+  // units](https://cloud.google.com/spanner/docs/compute-capacity).
   int32 node_count = 5;
 
-  // The number of processing units allocated to this instance. At most one of
-  // processing_units or node_count should be present in the message.
+  // The number of processing units allocated to this instance. At most, one of
+  // either `processing_units` or `node_count` should be present in the message.
   //
-  // Users can set the processing_units field to specify the target number of
+  // Users can set the `processing_units` field to specify the target number of
   // processing units allocated to the instance.
   //
-  // This may be zero in API responses for instances that are not yet in state
-  // `READY`.
+  // If autoscaling is enabled, `processing_units` is treated as an
+  // `OUTPUT_ONLY` field and reflects the current number of processing units
+  // allocated to the instance.
   //
-  // See [the
-  // documentation](https://cloud.google.com/spanner/docs/compute-capacity)
-  // for more information about nodes and processing units.
+  // This might be zero in API responses for instances that are not yet in the
+  // `READY` state.
+  //
+  // If the instance has varying processing units per replica
+  // (achieved by setting asymmetric_autoscaling_options in autoscaling config),
+  // the processing_units here is the maximum processing units across all
+  // replicas.
+  //
+  // For more information, see
+  // [Compute capacity, nodes and processing
+  // units](https://cloud.google.com/spanner/docs/compute-capacity).
   int32 processing_units = 9;
 
+  // Output only. Lists the compute capacity per ReplicaSelection. A replica
+  // selection identifies a set of replicas with common properties. Replicas
+  // identified by a ReplicaSelection are scaled with the same compute capacity.
+  repeated ReplicaComputeCapacity replica_compute_capacity = 19
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
   // Optional. The autoscaling configuration. Autoscaling is enabled if this
   // field is set. When autoscaling is enabled, node_count and processing_units
   // are treated as OUTPUT_ONLY fields and reflect the current compute capacity
@@ -1000,6 +1111,18 @@ message Instance {
 
   // Optional. The `Edition` of the current instance.
   Edition edition = 20 [(google.api.field_behavior) = OPTIONAL];
+
+  // Optional. Controls the default backup behavior for new databases within the
+  // instance.
+  //
+  // Note that `AUTOMATIC` is not permitted for free instances, as backups and
+  // backup schedules are not allowed for free instances.
+  //
+  // In the `GetInstance` or `ListInstances` response, if the value of
+  // default_backup_schedule_type is unset or NONE, no default backup
+  // schedule will be created for new databases within the instance.
+  DefaultBackupScheduleType default_backup_schedule_type = 23
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // The request for
diff --git a/protos/google/spanner/v1/commit_response.proto b/protos/google/spanner/v1/commit_response.proto
index d44aad63b..d5f9b15d5 100644
--- a/protos/google/spanner/v1/commit_response.proto
+++ b/protos/google/spanner/v1/commit_response.proto
@@ -17,6 +17,7 @@ syntax = "proto3";
 package google.spanner.v1;
 
 import "google/protobuf/timestamp.proto";
+import "google/spanner/v1/transaction.proto";
 
 option csharp_namespace = "Google.Cloud.Spanner.V1";
 option go_package = "cloud.google.com/go/spanner/apiv1/spannerpb;spannerpb";
@@ -47,4 +48,12 @@ message CommitResponse {
   // For more information, see
   // [CommitRequest.return_commit_stats][google.spanner.v1.CommitRequest.return_commit_stats].
   CommitStats commit_stats = 2;
+
+  // Clients should examine and retry the commit if any of the following
+  // reasons are populated.
+  oneof MultiplexedSessionRetry {
+    // If specified, transaction has not committed yet.
+    // Clients must retry the commit with the new precommit token.
+    MultiplexedSessionPrecommitToken precommit_token = 4;
+  }
 }
diff --git a/protos/google/spanner/v1/result_set.proto b/protos/google/spanner/v1/result_set.proto
index f392c1d7d..0b8aabf86 100644
--- a/protos/google/spanner/v1/result_set.proto
+++ b/protos/google/spanner/v1/result_set.proto
@@ -16,6 +16,7 @@ syntax = "proto3";
 
 package google.spanner.v1;
 
+import "google/api/field_behavior.proto";
 import "google/protobuf/struct.proto";
 import "google/spanner/v1/query_plan.proto";
 import "google/spanner/v1/transaction.proto";
@@ -53,6 +54,16 @@ message ResultSet {
   // Other fields may or may not be populated, based on the
   // [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode].
   ResultSetStats stats = 3;
+
+  // Optional. A precommit token will be included if the read-write transaction
+  // is on a multiplexed session.
+  // The precommit token with the highest sequence number from this transaction
+  // attempt should be passed to the
+  // [Commit][google.spanner.v1.Spanner.Commit] request for this transaction.
+  // This feature is not yet supported and will result in an UNIMPLEMENTED
+  // error.
+  MultiplexedSessionPrecommitToken precommit_token = 5
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // Partial results from a streaming read or SQL query. Streaming reads and
@@ -157,6 +168,16 @@ message PartialResultSet {
   // This field will also be present in the last response for DML
   // statements.
   ResultSetStats stats = 5;
+
+  // Optional. A precommit token will be included if the read-write transaction
+  // is on a multiplexed session.
+  // The precommit token with the highest sequence number from this transaction
+  // attempt should be passed to the
+  // [Commit][google.spanner.v1.Spanner.Commit] request for this transaction.
+  // This feature is not yet supported and will result in an UNIMPLEMENTED
+  // error.
+  MultiplexedSessionPrecommitToken precommit_token = 8
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // Metadata about a [ResultSet][google.spanner.v1.ResultSet] or [PartialResultSet][google.spanner.v1.PartialResultSet].
diff --git a/protos/google/spanner/v1/spanner.proto b/protos/google/spanner/v1/spanner.proto
index 301139210..847815464 100644
--- a/protos/google/spanner/v1/spanner.proto
+++ b/protos/google/spanner/v1/spanner.proto
@@ -628,9 +628,19 @@ message ExecuteSqlRequest {
     // execution statistics information.
     PLAN = 1;
 
-    // This mode returns both the query plan and the execution statistics along
-    // with the results.
+    // This mode returns the query plan, overall execution statistics,
+    // operator level execution statistics along with the results. This has a
+    // performance overhead compared to the other modes. It is not recommended
+    // to use this mode for production traffic.
     PROFILE = 2;
+
+    // This mode returns the overall (but not operator-level) execution
+    // statistics along with the results.
+    WITH_STATS = 3;
+
+    // This mode returns the query plan, overall (but not operator-level)
+    // execution statistics along with the results.
+    WITH_PLAN_AND_STATS = 4;
   }
 
   // Query optimizer configuration.
@@ -899,6 +909,16 @@ message ExecuteBatchDmlResponse {
   // If all DML statements are executed successfully, the status is `OK`.
   // Otherwise, the error status of the first failed statement.
   google.rpc.Status status = 2;
+
+  // Optional. A precommit token will be included if the read-write transaction
+  // is on a multiplexed session.
+  // The precommit token with the highest sequence number from this transaction
+  // attempt should be passed to the
+  // [Commit][google.spanner.v1.Spanner.Commit] request for this transaction.
+  // This feature is not yet supported and will result in an UNIMPLEMENTED
+  // error.
+  MultiplexedSessionPrecommitToken precommit_token = 3
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // Options for a PartitionQueryRequest and
@@ -1215,6 +1235,14 @@ message BeginTransactionRequest {
   // transaction, set it on the reads and writes that are part of this
   // transaction instead.
   RequestOptions request_options = 3;
+
+  // Optional. Required for read-write transactions on a multiplexed session
+  // that commit mutations but do not perform any reads or queries. Clients
+  // should randomly select one of the mutations from the mutation set and send
+  // it as a part of this request.
+  // This feature is not yet supported and will result in an UNIMPLEMENTED
+  // error.
+  Mutation mutation_key = 4 [(google.api.field_behavior) = OPTIONAL];
 }
 
 // The request for [Commit][google.spanner.v1.Spanner.Commit].
@@ -1262,6 +1290,15 @@ message CommitRequest {
 
   // Common options for this request.
   RequestOptions request_options = 6;
+
+  // Optional. If the read-write transaction was executed on a multiplexed
+  // session, the precommit token with the highest sequence number received in
+  // this transaction attempt, should be included here. Failing to do so will
+  // result in a FailedPrecondition error.
+  // This feature is not yet supported and will result in an UNIMPLEMENTED
+  // error.
+  MultiplexedSessionPrecommitToken precommit_token = 9
+      [(google.api.field_behavior) = OPTIONAL];
 }
 
 // The request for [Rollback][google.spanner.v1.Spanner.Rollback].
diff --git a/protos/google/spanner/v1/transaction.proto b/protos/google/spanner/v1/transaction.proto
index 8af513d15..fe5645384 100644
--- a/protos/google/spanner/v1/transaction.proto
+++ b/protos/google/spanner/v1/transaction.proto
@@ -16,6 +16,7 @@ syntax = "proto3";
 
 package google.spanner.v1;
 
+import "google/api/field_behavior.proto";
 import "google/protobuf/duration.proto";
 import "google/protobuf/timestamp.proto";
 
@@ -378,6 +379,14 @@ message TransactionOptions {
 
     // Read lock mode for the transaction.
     ReadLockMode read_lock_mode = 1;
+
+    // Optional. Clients should pass the transaction ID of the previous
+    // transaction attempt that was aborted if this transaction is being
+    // executed on a multiplexed session.
+    // This feature is not yet supported and will result in an UNIMPLEMENTED
+    // error.
+    bytes multiplexed_session_previous_transaction_id = 2
+        [(google.api.field_behavior) = OPTIONAL];
   }
 
   // Message type to initiate a Partitioned DML transaction.
@@ -512,6 +521,17 @@ message Transaction {
   // A timestamp in RFC3339 UTC \"Zulu\" format, accurate to nanoseconds.
   // Example: `"2014-10-02T15:01:23.045123456Z"`.
   google.protobuf.Timestamp read_timestamp = 2;
+
+  // A precommit token will be included in the response of a BeginTransaction
+  // request if the read-write transaction is on a multiplexed session and
+  // a mutation_key was specified in the
+  // [BeginTransaction][google.spanner.v1.BeginTransactionRequest].
+  // The precommit token with the highest sequence number from this transaction
+  // attempt should be passed to the [Commit][google.spanner.v1.Spanner.Commit]
+  // request for this transaction.
+  // This feature is not yet supported and will result in an UNIMPLEMENTED
+  // error.
+  MultiplexedSessionPrecommitToken precommit_token = 3;
 }
 
 // This message is used to select the transaction in which a
@@ -539,3 +559,17 @@ message TransactionSelector {
     TransactionOptions begin = 3;
   }
 }
+
+// When a read-write transaction is executed on a multiplexed session,
+// this precommit token is sent back to the client
+// as a part of the [Transaction] message in the BeginTransaction response and
+// also as a part of the [ResultSet] and [PartialResultSet] responses.
+message MultiplexedSessionPrecommitToken {
+  // Opaque precommit token.
+  bytes precommit_token = 1;
+
+  // An incrementing seq number is generated on every precommit token
+  // that is returned. Clients should remember the precommit token with the
+  // highest sequence number from the current transaction attempt.
+  int32 seq_num = 2;
+}
diff --git a/protos/google/spanner/v1/type.proto b/protos/google/spanner/v1/type.proto
index 4e77106c9..734cfb54c 100644
--- a/protos/google/spanner/v1/type.proto
+++ b/protos/google/spanner/v1/type.proto
@@ -32,20 +32,24 @@ message Type {
   // Required. The [TypeCode][google.spanner.v1.TypeCode] for this type.
   TypeCode code = 1 [(google.api.field_behavior) = REQUIRED];
 
-  // If [code][google.spanner.v1.Type.code] == [ARRAY][google.spanner.v1.TypeCode.ARRAY], then `array_element_type`
-  // is the type of the array elements.
+  // If [code][google.spanner.v1.Type.code] ==
+  // [ARRAY][google.spanner.v1.TypeCode.ARRAY], then `array_element_type` is the
+  // type of the array elements.
   Type array_element_type = 2;
 
-  // If [code][google.spanner.v1.Type.code] == [STRUCT][google.spanner.v1.TypeCode.STRUCT], then `struct_type`
-  // provides type information for the struct's fields.
+  // If [code][google.spanner.v1.Type.code] ==
+  // [STRUCT][google.spanner.v1.TypeCode.STRUCT], then `struct_type` provides
+  // type information for the struct's fields.
   StructType struct_type = 3;
 
-  // The [TypeAnnotationCode][google.spanner.v1.TypeAnnotationCode] that disambiguates SQL type that Spanner will
-  // use to represent values of this type during query processing. This is
-  // necessary for some type codes because a single [TypeCode][google.spanner.v1.TypeCode] can be mapped
-  // to different SQL types depending on the SQL dialect. [type_annotation][google.spanner.v1.Type.type_annotation]
-  // typically is not needed to process the content of a value (it doesn't
-  // affect serialization) and clients can ignore it on the read path.
+  // The [TypeAnnotationCode][google.spanner.v1.TypeAnnotationCode] that
+  // disambiguates SQL type that Spanner will use to represent values of this
+  // type during query processing. This is necessary for some type codes because
+  // a single [TypeCode][google.spanner.v1.TypeCode] can be mapped to different
+  // SQL types depending on the SQL dialect.
+  // [type_annotation][google.spanner.v1.Type.type_annotation] typically is not
+  // needed to process the content of a value (it doesn't affect serialization)
+  // and clients can ignore it on the read path.
   TypeAnnotationCode type_annotation = 4;
 
   // If [code][google.spanner.v1.Type.code] ==
@@ -56,7 +60,8 @@ message Type {
   string proto_type_fqn = 5;
 }
 
-// `StructType` defines the fields of a [STRUCT][google.spanner.v1.TypeCode.STRUCT] type.
+// `StructType` defines the fields of a
+// [STRUCT][google.spanner.v1.TypeCode.STRUCT] type.
 message StructType {
   // Message representing a single field of a struct.
   message Field {
@@ -76,9 +81,9 @@ message StructType {
   // The list of fields that make up this struct. Order is
   // significant, because values of this struct type are represented as
   // lists, where the order of field values matches the order of
-  // fields in the [StructType][google.spanner.v1.StructType]. In turn, the order of fields
-  // matches the order of columns in a read request, or the order of
-  // fields in the `SELECT` clause of a query.
+  // fields in the [StructType][google.spanner.v1.StructType]. In turn, the
+  // order of fields matches the order of columns in a read request, or the
+  // order of fields in the `SELECT` clause of a query.
   repeated Field fields = 1;
 }
 
@@ -137,14 +142,14 @@ enum TypeCode {
   STRUCT = 9;
 
   // Encoded as `string`, in decimal format or scientific notation format.
-  // <br>Decimal format:
-  // <br>`[+-]Digits[.[Digits]]` or
-  // <br>`[+-][Digits].Digits`
+  // Decimal format:
+  // `[+-]Digits[.[Digits]]` or
+  // `[+-][Digits].Digits`
   //
   // Scientific notation:
-  // <br>`[+-]Digits[.[Digits]][ExponentIndicator[+-]Digits]` or
-  // <br>`[+-][Digits].Digits[ExponentIndicator[+-]Digits]`
-  // <br>(ExponentIndicator is `"e"` or `"E"`)
+  // `[+-]Digits[.[Digits]][ExponentIndicator[+-]Digits]` or
+  // `[+-][Digits].Digits[ExponentIndicator[+-]Digits]`
+  // (ExponentIndicator is `"e"` or `"E"`)
   NUMERIC = 10;
 
   // Encoded as a JSON-formatted `string` as described in RFC 7159. The
@@ -163,6 +168,13 @@ enum TypeCode {
 
   // Encoded as `string`, in decimal format.
   ENUM = 14;
+
+  // Encoded as `string`, in `ISO8601` duration format -
+  // `P[n]Y[n]M[n]DT[n]H[n]M[n[.fraction]]S`
+  // where `n` is an integer.
+  // For example, `P1Y2M3DT4H5M6.5S` represents time duration of 1 year, 2
+  // months, 3 days, 4 hours, 5 minutes, and 6.5 seconds.
+  INTERVAL = 16;
 }
 
 // `TypeAnnotationCode` is used as a part of [Type][google.spanner.v1.Type] to
@@ -175,19 +187,20 @@ enum TypeAnnotationCode {
   TYPE_ANNOTATION_CODE_UNSPECIFIED = 0;
 
   // PostgreSQL compatible NUMERIC type. This annotation needs to be applied to
-  // [Type][google.spanner.v1.Type] instances having [NUMERIC][google.spanner.v1.TypeCode.NUMERIC]
-  // type code to specify that values of this type should be treated as
-  // PostgreSQL NUMERIC values. Currently this annotation is always needed for
-  // [NUMERIC][google.spanner.v1.TypeCode.NUMERIC] when a client interacts with PostgreSQL-enabled
-  // Spanner databases.
+  // [Type][google.spanner.v1.Type] instances having
+  // [NUMERIC][google.spanner.v1.TypeCode.NUMERIC] type code to specify that
+  // values of this type should be treated as PostgreSQL NUMERIC values.
+  // Currently this annotation is always needed for
+  // [NUMERIC][google.spanner.v1.TypeCode.NUMERIC] when a client interacts with
+  // PostgreSQL-enabled Spanner databases.
   PG_NUMERIC = 2;
 
   // PostgreSQL compatible JSONB type. This annotation needs to be applied to
-  // [Type][google.spanner.v1.Type] instances having [JSON][google.spanner.v1.TypeCode.JSON]
-  // type code to specify that values of this type should be treated as
-  // PostgreSQL JSONB values. Currently this annotation is always needed for
-  // [JSON][google.spanner.v1.TypeCode.JSON] when a client interacts with PostgreSQL-enabled
-  // Spanner databases.
+  // [Type][google.spanner.v1.Type] instances having
+  // [JSON][google.spanner.v1.TypeCode.JSON] type code to specify that values of
+  // this type should be treated as PostgreSQL JSONB values. Currently this
+  // annotation is always needed for [JSON][google.spanner.v1.TypeCode.JSON]
+  // when a client interacts with PostgreSQL-enabled Spanner databases.
   PG_JSONB = 3;
 
   // PostgreSQL compatible OID type. This annotation can be used by a client
diff --git a/protos/protos.d.ts b/protos/protos.d.ts
index c922b8d9f..d64ef1eb3 100644
--- a/protos/protos.d.ts
+++ b/protos/protos.d.ts
@@ -13124,6 +13124,103 @@ export namespace google {
                         FULFILLMENT_PERIOD_EXTENDED = 2
                     }
 
+                    /** Properties of a ReplicaSelection. */
+                    interface IReplicaSelection {
+
+                        /** ReplicaSelection location */
+                        location?: (string|null);
+                    }
+
+                    /** Represents a ReplicaSelection. */
+                    class ReplicaSelection implements IReplicaSelection {
+
+                        /**
+                         * Constructs a new ReplicaSelection.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.spanner.admin.instance.v1.IReplicaSelection);
+
+                        /** ReplicaSelection location. */
+                        public location: string;
+
+                        /**
+                         * Creates a new ReplicaSelection instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns ReplicaSelection instance
+                         */
+                        public static create(properties?: google.spanner.admin.instance.v1.IReplicaSelection): google.spanner.admin.instance.v1.ReplicaSelection;
+
+                        /**
+                         * Encodes the specified ReplicaSelection message. Does not implicitly {@link google.spanner.admin.instance.v1.ReplicaSelection.verify|verify} messages.
+                         * @param message ReplicaSelection message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.spanner.admin.instance.v1.IReplicaSelection, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified ReplicaSelection message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.ReplicaSelection.verify|verify} messages.
+                         * @param message ReplicaSelection message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.spanner.admin.instance.v1.IReplicaSelection, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a ReplicaSelection message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns ReplicaSelection
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.admin.instance.v1.ReplicaSelection;
+
+                        /**
+                         * Decodes a ReplicaSelection message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns ReplicaSelection
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.admin.instance.v1.ReplicaSelection;
+
+                        /**
+                         * Verifies a ReplicaSelection message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a ReplicaSelection message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns ReplicaSelection
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.spanner.admin.instance.v1.ReplicaSelection;
+
+                        /**
+                         * Creates a plain object from a ReplicaSelection message. Also converts values to other types if specified.
+                         * @param message ReplicaSelection
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.spanner.admin.instance.v1.ReplicaSelection, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this ReplicaSelection to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for ReplicaSelection
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
                     /** Represents an InstanceAdmin */
                     class InstanceAdmin extends $protobuf.rpc.Service {
 
@@ -13883,6 +13980,118 @@ export namespace google {
                         }
                     }
 
+                    /** Properties of a ReplicaComputeCapacity. */
+                    interface IReplicaComputeCapacity {
+
+                        /** ReplicaComputeCapacity replicaSelection */
+                        replicaSelection?: (google.spanner.admin.instance.v1.IReplicaSelection|null);
+
+                        /** ReplicaComputeCapacity nodeCount */
+                        nodeCount?: (number|null);
+
+                        /** ReplicaComputeCapacity processingUnits */
+                        processingUnits?: (number|null);
+                    }
+
+                    /** Represents a ReplicaComputeCapacity. */
+                    class ReplicaComputeCapacity implements IReplicaComputeCapacity {
+
+                        /**
+                         * Constructs a new ReplicaComputeCapacity.
+                         * @param [properties] Properties to set
+                         */
+                        constructor(properties?: google.spanner.admin.instance.v1.IReplicaComputeCapacity);
+
+                        /** ReplicaComputeCapacity replicaSelection. */
+                        public replicaSelection?: (google.spanner.admin.instance.v1.IReplicaSelection|null);
+
+                        /** ReplicaComputeCapacity nodeCount. */
+                        public nodeCount?: (number|null);
+
+                        /** ReplicaComputeCapacity processingUnits. */
+                        public processingUnits?: (number|null);
+
+                        /** ReplicaComputeCapacity computeCapacity. */
+                        public computeCapacity?: ("nodeCount"|"processingUnits");
+
+                        /**
+                         * Creates a new ReplicaComputeCapacity instance using the specified properties.
+                         * @param [properties] Properties to set
+                         * @returns ReplicaComputeCapacity instance
+                         */
+                        public static create(properties?: google.spanner.admin.instance.v1.IReplicaComputeCapacity): google.spanner.admin.instance.v1.ReplicaComputeCapacity;
+
+                        /**
+                         * Encodes the specified ReplicaComputeCapacity message. Does not implicitly {@link google.spanner.admin.instance.v1.ReplicaComputeCapacity.verify|verify} messages.
+                         * @param message ReplicaComputeCapacity message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encode(message: google.spanner.admin.instance.v1.IReplicaComputeCapacity, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Encodes the specified ReplicaComputeCapacity message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.ReplicaComputeCapacity.verify|verify} messages.
+                         * @param message ReplicaComputeCapacity message or plain object to encode
+                         * @param [writer] Writer to encode to
+                         * @returns Writer
+                         */
+                        public static encodeDelimited(message: google.spanner.admin.instance.v1.IReplicaComputeCapacity, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                        /**
+                         * Decodes a ReplicaComputeCapacity message from the specified reader or buffer.
+                         * @param reader Reader or buffer to decode from
+                         * @param [length] Message length if known beforehand
+                         * @returns ReplicaComputeCapacity
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.admin.instance.v1.ReplicaComputeCapacity;
+
+                        /**
+                         * Decodes a ReplicaComputeCapacity message from the specified reader or buffer, length delimited.
+                         * @param reader Reader or buffer to decode from
+                         * @returns ReplicaComputeCapacity
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.admin.instance.v1.ReplicaComputeCapacity;
+
+                        /**
+                         * Verifies a ReplicaComputeCapacity message.
+                         * @param message Plain object to verify
+                         * @returns `null` if valid, otherwise the reason why it is not
+                         */
+                        public static verify(message: { [k: string]: any }): (string|null);
+
+                        /**
+                         * Creates a ReplicaComputeCapacity message from a plain object. Also converts values to their respective internal types.
+                         * @param object Plain object
+                         * @returns ReplicaComputeCapacity
+                         */
+                        public static fromObject(object: { [k: string]: any }): google.spanner.admin.instance.v1.ReplicaComputeCapacity;
+
+                        /**
+                         * Creates a plain object from a ReplicaComputeCapacity message. Also converts values to other types if specified.
+                         * @param message ReplicaComputeCapacity
+                         * @param [options] Conversion options
+                         * @returns Plain object
+                         */
+                        public static toObject(message: google.spanner.admin.instance.v1.ReplicaComputeCapacity, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                        /**
+                         * Converts this ReplicaComputeCapacity to JSON.
+                         * @returns JSON object
+                         */
+                        public toJSON(): { [k: string]: any };
+
+                        /**
+                         * Gets the default type url for ReplicaComputeCapacity
+                         * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns The default type url
+                         */
+                        public static getTypeUrl(typeUrlPrefix?: string): string;
+                    }
+
                     /** Properties of an AutoscalingConfig. */
                     interface IAutoscalingConfig {
 
@@ -13891,6 +14100,9 @@ export namespace google {
 
                         /** AutoscalingConfig autoscalingTargets */
                         autoscalingTargets?: (google.spanner.admin.instance.v1.AutoscalingConfig.IAutoscalingTargets|null);
+
+                        /** AutoscalingConfig asymmetricAutoscalingOptions */
+                        asymmetricAutoscalingOptions?: (google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption[]|null);
                     }
 
                     /** Represents an AutoscalingConfig. */
@@ -13908,6 +14120,9 @@ export namespace google {
                         /** AutoscalingConfig autoscalingTargets. */
                         public autoscalingTargets?: (google.spanner.admin.instance.v1.AutoscalingConfig.IAutoscalingTargets|null);
 
+                        /** AutoscalingConfig asymmetricAutoscalingOptions. */
+                        public asymmetricAutoscalingOptions: google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption[];
+
                         /**
                          * Creates a new AutoscalingConfig instance using the specified properties.
                          * @param [properties] Properties to set
@@ -14211,6 +14426,215 @@ export namespace google {
                              */
                             public static getTypeUrl(typeUrlPrefix?: string): string;
                         }
+
+                        /** Properties of an AsymmetricAutoscalingOption. */
+                        interface IAsymmetricAutoscalingOption {
+
+                            /** AsymmetricAutoscalingOption replicaSelection */
+                            replicaSelection?: (google.spanner.admin.instance.v1.IReplicaSelection|null);
+
+                            /** AsymmetricAutoscalingOption overrides */
+                            overrides?: (google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides|null);
+                        }
+
+                        /** Represents an AsymmetricAutoscalingOption. */
+                        class AsymmetricAutoscalingOption implements IAsymmetricAutoscalingOption {
+
+                            /**
+                             * Constructs a new AsymmetricAutoscalingOption.
+                             * @param [properties] Properties to set
+                             */
+                            constructor(properties?: google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption);
+
+                            /** AsymmetricAutoscalingOption replicaSelection. */
+                            public replicaSelection?: (google.spanner.admin.instance.v1.IReplicaSelection|null);
+
+                            /** AsymmetricAutoscalingOption overrides. */
+                            public overrides?: (google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides|null);
+
+                            /**
+                             * Creates a new AsymmetricAutoscalingOption instance using the specified properties.
+                             * @param [properties] Properties to set
+                             * @returns AsymmetricAutoscalingOption instance
+                             */
+                            public static create(properties?: google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption): google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption;
+
+                            /**
+                             * Encodes the specified AsymmetricAutoscalingOption message. Does not implicitly {@link google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.verify|verify} messages.
+                             * @param message AsymmetricAutoscalingOption message or plain object to encode
+                             * @param [writer] Writer to encode to
+                             * @returns Writer
+                             */
+                            public static encode(message: google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                            /**
+                             * Encodes the specified AsymmetricAutoscalingOption message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.verify|verify} messages.
+                             * @param message AsymmetricAutoscalingOption message or plain object to encode
+                             * @param [writer] Writer to encode to
+                             * @returns Writer
+                             */
+                            public static encodeDelimited(message: google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                            /**
+                             * Decodes an AsymmetricAutoscalingOption message from the specified reader or buffer.
+                             * @param reader Reader or buffer to decode from
+                             * @param [length] Message length if known beforehand
+                             * @returns AsymmetricAutoscalingOption
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption;
+
+                            /**
+                             * Decodes an AsymmetricAutoscalingOption message from the specified reader or buffer, length delimited.
+                             * @param reader Reader or buffer to decode from
+                             * @returns AsymmetricAutoscalingOption
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption;
+
+                            /**
+                             * Verifies an AsymmetricAutoscalingOption message.
+                             * @param message Plain object to verify
+                             * @returns `null` if valid, otherwise the reason why it is not
+                             */
+                            public static verify(message: { [k: string]: any }): (string|null);
+
+                            /**
+                             * Creates an AsymmetricAutoscalingOption message from a plain object. Also converts values to their respective internal types.
+                             * @param object Plain object
+                             * @returns AsymmetricAutoscalingOption
+                             */
+                            public static fromObject(object: { [k: string]: any }): google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption;
+
+                            /**
+                             * Creates a plain object from an AsymmetricAutoscalingOption message. Also converts values to other types if specified.
+                             * @param message AsymmetricAutoscalingOption
+                             * @param [options] Conversion options
+                             * @returns Plain object
+                             */
+                            public static toObject(message: google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                            /**
+                             * Converts this AsymmetricAutoscalingOption to JSON.
+                             * @returns JSON object
+                             */
+                            public toJSON(): { [k: string]: any };
+
+                            /**
+                             * Gets the default type url for AsymmetricAutoscalingOption
+                             * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns The default type url
+                             */
+                            public static getTypeUrl(typeUrlPrefix?: string): string;
+                        }
+
+                        namespace AsymmetricAutoscalingOption {
+
+                            /** Properties of an AutoscalingConfigOverrides. */
+                            interface IAutoscalingConfigOverrides {
+
+                                /** AutoscalingConfigOverrides autoscalingLimits */
+                                autoscalingLimits?: (google.spanner.admin.instance.v1.AutoscalingConfig.IAutoscalingLimits|null);
+
+                                /** AutoscalingConfigOverrides autoscalingTargetHighPriorityCpuUtilizationPercent */
+                                autoscalingTargetHighPriorityCpuUtilizationPercent?: (number|null);
+                            }
+
+                            /** Represents an AutoscalingConfigOverrides. */
+                            class AutoscalingConfigOverrides implements IAutoscalingConfigOverrides {
+
+                                /**
+                                 * Constructs a new AutoscalingConfigOverrides.
+                                 * @param [properties] Properties to set
+                                 */
+                                constructor(properties?: google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides);
+
+                                /** AutoscalingConfigOverrides autoscalingLimits. */
+                                public autoscalingLimits?: (google.spanner.admin.instance.v1.AutoscalingConfig.IAutoscalingLimits|null);
+
+                                /** AutoscalingConfigOverrides autoscalingTargetHighPriorityCpuUtilizationPercent. */
+                                public autoscalingTargetHighPriorityCpuUtilizationPercent: number;
+
+                                /**
+                                 * Creates a new AutoscalingConfigOverrides instance using the specified properties.
+                                 * @param [properties] Properties to set
+                                 * @returns AutoscalingConfigOverrides instance
+                                 */
+                                public static create(properties?: google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides): google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides;
+
+                                /**
+                                 * Encodes the specified AutoscalingConfigOverrides message. Does not implicitly {@link google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.verify|verify} messages.
+                                 * @param message AutoscalingConfigOverrides message or plain object to encode
+                                 * @param [writer] Writer to encode to
+                                 * @returns Writer
+                                 */
+                                public static encode(message: google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                                /**
+                                 * Encodes the specified AutoscalingConfigOverrides message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.verify|verify} messages.
+                                 * @param message AutoscalingConfigOverrides message or plain object to encode
+                                 * @param [writer] Writer to encode to
+                                 * @returns Writer
+                                 */
+                                public static encodeDelimited(message: google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                                /**
+                                 * Decodes an AutoscalingConfigOverrides message from the specified reader or buffer.
+                                 * @param reader Reader or buffer to decode from
+                                 * @param [length] Message length if known beforehand
+                                 * @returns AutoscalingConfigOverrides
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides;
+
+                                /**
+                                 * Decodes an AutoscalingConfigOverrides message from the specified reader or buffer, length delimited.
+                                 * @param reader Reader or buffer to decode from
+                                 * @returns AutoscalingConfigOverrides
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides;
+
+                                /**
+                                 * Verifies an AutoscalingConfigOverrides message.
+                                 * @param message Plain object to verify
+                                 * @returns `null` if valid, otherwise the reason why it is not
+                                 */
+                                public static verify(message: { [k: string]: any }): (string|null);
+
+                                /**
+                                 * Creates an AutoscalingConfigOverrides message from a plain object. Also converts values to their respective internal types.
+                                 * @param object Plain object
+                                 * @returns AutoscalingConfigOverrides
+                                 */
+                                public static fromObject(object: { [k: string]: any }): google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides;
+
+                                /**
+                                 * Creates a plain object from an AutoscalingConfigOverrides message. Also converts values to other types if specified.
+                                 * @param message AutoscalingConfigOverrides
+                                 * @param [options] Conversion options
+                                 * @returns Plain object
+                                 */
+                                public static toObject(message: google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                                /**
+                                 * Converts this AutoscalingConfigOverrides to JSON.
+                                 * @returns JSON object
+                                 */
+                                public toJSON(): { [k: string]: any };
+
+                                /**
+                                 * Gets the default type url for AutoscalingConfigOverrides
+                                 * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                                 * @returns The default type url
+                                 */
+                                public static getTypeUrl(typeUrlPrefix?: string): string;
+                            }
+                        }
                     }
 
                     /** Properties of an Instance. */
@@ -14231,6 +14655,9 @@ export namespace google {
                         /** Instance processingUnits */
                         processingUnits?: (number|null);
 
+                        /** Instance replicaComputeCapacity */
+                        replicaComputeCapacity?: (google.spanner.admin.instance.v1.IReplicaComputeCapacity[]|null);
+
                         /** Instance autoscalingConfig */
                         autoscalingConfig?: (google.spanner.admin.instance.v1.IAutoscalingConfig|null);
 
@@ -14251,6 +14678,9 @@ export namespace google {
 
                         /** Instance edition */
                         edition?: (google.spanner.admin.instance.v1.Instance.Edition|keyof typeof google.spanner.admin.instance.v1.Instance.Edition|null);
+
+                        /** Instance defaultBackupScheduleType */
+                        defaultBackupScheduleType?: (google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType|keyof typeof google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType|null);
                     }
 
                     /** Represents an Instance. */
@@ -14277,6 +14707,9 @@ export namespace google {
                         /** Instance processingUnits. */
                         public processingUnits: number;
 
+                        /** Instance replicaComputeCapacity. */
+                        public replicaComputeCapacity: google.spanner.admin.instance.v1.IReplicaComputeCapacity[];
+
                         /** Instance autoscalingConfig. */
                         public autoscalingConfig?: (google.spanner.admin.instance.v1.IAutoscalingConfig|null);
 
@@ -14298,6 +14731,9 @@ export namespace google {
                         /** Instance edition. */
                         public edition: (google.spanner.admin.instance.v1.Instance.Edition|keyof typeof google.spanner.admin.instance.v1.Instance.Edition);
 
+                        /** Instance defaultBackupScheduleType. */
+                        public defaultBackupScheduleType: (google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType|keyof typeof google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType);
+
                         /**
                          * Creates a new Instance instance using the specified properties.
                          * @param [properties] Properties to set
@@ -14392,6 +14828,13 @@ export namespace google {
                             ENTERPRISE = 2,
                             ENTERPRISE_PLUS = 3
                         }
+
+                        /** DefaultBackupScheduleType enum. */
+                        enum DefaultBackupScheduleType {
+                            DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED = 0,
+                            NONE = 1,
+                            AUTOMATIC = 2
+                        }
                     }
 
                     /** Properties of a ListInstanceConfigsRequest. */
@@ -29206,7 +29649,9 @@ export namespace google {
                 enum QueryMode {
                     NORMAL = 0,
                     PLAN = 1,
-                    PROFILE = 2
+                    PROFILE = 2,
+                    WITH_STATS = 3,
+                    WITH_PLAN_AND_STATS = 4
                 }
 
                 /** Properties of a QueryOptions. */
@@ -29554,6 +29999,9 @@ export namespace google {
 
                 /** ExecuteBatchDmlResponse status */
                 status?: (google.rpc.IStatus|null);
+
+                /** ExecuteBatchDmlResponse precommitToken */
+                precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
             }
 
             /** Represents an ExecuteBatchDmlResponse. */
@@ -29571,6 +30019,9 @@ export namespace google {
                 /** ExecuteBatchDmlResponse status. */
                 public status?: (google.rpc.IStatus|null);
 
+                /** ExecuteBatchDmlResponse precommitToken. */
+                public precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
+
                 /**
                  * Creates a new ExecuteBatchDmlResponse instance using the specified properties.
                  * @param [properties] Properties to set
@@ -30415,6 +30866,9 @@ export namespace google {
 
                 /** BeginTransactionRequest requestOptions */
                 requestOptions?: (google.spanner.v1.IRequestOptions|null);
+
+                /** BeginTransactionRequest mutationKey */
+                mutationKey?: (google.spanner.v1.IMutation|null);
             }
 
             /** Represents a BeginTransactionRequest. */
@@ -30435,6 +30889,9 @@ export namespace google {
                 /** BeginTransactionRequest requestOptions. */
                 public requestOptions?: (google.spanner.v1.IRequestOptions|null);
 
+                /** BeginTransactionRequest mutationKey. */
+                public mutationKey?: (google.spanner.v1.IMutation|null);
+
                 /**
                  * Creates a new BeginTransactionRequest instance using the specified properties.
                  * @param [properties] Properties to set
@@ -30536,6 +30993,9 @@ export namespace google {
 
                 /** CommitRequest requestOptions */
                 requestOptions?: (google.spanner.v1.IRequestOptions|null);
+
+                /** CommitRequest precommitToken */
+                precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
             }
 
             /** Represents a CommitRequest. */
@@ -30568,6 +31028,9 @@ export namespace google {
                 /** CommitRequest requestOptions. */
                 public requestOptions?: (google.spanner.v1.IRequestOptions|null);
 
+                /** CommitRequest precommitToken. */
+                public precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
+
                 /** CommitRequest transaction. */
                 public transaction?: ("transactionId"|"singleUseTransaction");
 
@@ -31084,6 +31547,9 @@ export namespace google {
 
                 /** CommitResponse commitStats */
                 commitStats?: (google.spanner.v1.CommitResponse.ICommitStats|null);
+
+                /** CommitResponse precommitToken */
+                precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
             }
 
             /** Represents a CommitResponse. */
@@ -31101,6 +31567,12 @@ export namespace google {
                 /** CommitResponse commitStats. */
                 public commitStats?: (google.spanner.v1.CommitResponse.ICommitStats|null);
 
+                /** CommitResponse precommitToken. */
+                public precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
+
+                /** CommitResponse MultiplexedSessionRetry. */
+                public MultiplexedSessionRetry?: "precommitToken";
+
                 /**
                  * Creates a new CommitResponse instance using the specified properties.
                  * @param [properties] Properties to set
@@ -31279,568 +31751,454 @@ export namespace google {
                 }
             }
 
-            /** Properties of a KeyRange. */
-            interface IKeyRange {
+            /** Properties of a TransactionOptions. */
+            interface ITransactionOptions {
 
-                /** KeyRange startClosed */
-                startClosed?: (google.protobuf.IListValue|null);
+                /** TransactionOptions readWrite */
+                readWrite?: (google.spanner.v1.TransactionOptions.IReadWrite|null);
 
-                /** KeyRange startOpen */
-                startOpen?: (google.protobuf.IListValue|null);
+                /** TransactionOptions partitionedDml */
+                partitionedDml?: (google.spanner.v1.TransactionOptions.IPartitionedDml|null);
 
-                /** KeyRange endClosed */
-                endClosed?: (google.protobuf.IListValue|null);
+                /** TransactionOptions readOnly */
+                readOnly?: (google.spanner.v1.TransactionOptions.IReadOnly|null);
 
-                /** KeyRange endOpen */
-                endOpen?: (google.protobuf.IListValue|null);
+                /** TransactionOptions excludeTxnFromChangeStreams */
+                excludeTxnFromChangeStreams?: (boolean|null);
             }
 
-            /** Represents a KeyRange. */
-            class KeyRange implements IKeyRange {
+            /** Represents a TransactionOptions. */
+            class TransactionOptions implements ITransactionOptions {
 
                 /**
-                 * Constructs a new KeyRange.
+                 * Constructs a new TransactionOptions.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.IKeyRange);
+                constructor(properties?: google.spanner.v1.ITransactionOptions);
 
-                /** KeyRange startClosed. */
-                public startClosed?: (google.protobuf.IListValue|null);
+                /** TransactionOptions readWrite. */
+                public readWrite?: (google.spanner.v1.TransactionOptions.IReadWrite|null);
 
-                /** KeyRange startOpen. */
-                public startOpen?: (google.protobuf.IListValue|null);
-
-                /** KeyRange endClosed. */
-                public endClosed?: (google.protobuf.IListValue|null);
+                /** TransactionOptions partitionedDml. */
+                public partitionedDml?: (google.spanner.v1.TransactionOptions.IPartitionedDml|null);
 
-                /** KeyRange endOpen. */
-                public endOpen?: (google.protobuf.IListValue|null);
+                /** TransactionOptions readOnly. */
+                public readOnly?: (google.spanner.v1.TransactionOptions.IReadOnly|null);
 
-                /** KeyRange startKeyType. */
-                public startKeyType?: ("startClosed"|"startOpen");
+                /** TransactionOptions excludeTxnFromChangeStreams. */
+                public excludeTxnFromChangeStreams: boolean;
 
-                /** KeyRange endKeyType. */
-                public endKeyType?: ("endClosed"|"endOpen");
+                /** TransactionOptions mode. */
+                public mode?: ("readWrite"|"partitionedDml"|"readOnly");
 
                 /**
-                 * Creates a new KeyRange instance using the specified properties.
+                 * Creates a new TransactionOptions instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns KeyRange instance
+                 * @returns TransactionOptions instance
                  */
-                public static create(properties?: google.spanner.v1.IKeyRange): google.spanner.v1.KeyRange;
+                public static create(properties?: google.spanner.v1.ITransactionOptions): google.spanner.v1.TransactionOptions;
 
                 /**
-                 * Encodes the specified KeyRange message. Does not implicitly {@link google.spanner.v1.KeyRange.verify|verify} messages.
-                 * @param message KeyRange message or plain object to encode
+                 * Encodes the specified TransactionOptions message. Does not implicitly {@link google.spanner.v1.TransactionOptions.verify|verify} messages.
+                 * @param message TransactionOptions message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.IKeyRange, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.ITransactionOptions, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified KeyRange message, length delimited. Does not implicitly {@link google.spanner.v1.KeyRange.verify|verify} messages.
-                 * @param message KeyRange message or plain object to encode
+                 * Encodes the specified TransactionOptions message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.verify|verify} messages.
+                 * @param message TransactionOptions message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.IKeyRange, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.ITransactionOptions, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a KeyRange message from the specified reader or buffer.
+                 * Decodes a TransactionOptions message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns KeyRange
+                 * @returns TransactionOptions
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.KeyRange;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionOptions;
 
                 /**
-                 * Decodes a KeyRange message from the specified reader or buffer, length delimited.
+                 * Decodes a TransactionOptions message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns KeyRange
+                 * @returns TransactionOptions
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.KeyRange;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionOptions;
 
                 /**
-                 * Verifies a KeyRange message.
+                 * Verifies a TransactionOptions message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a KeyRange message from a plain object. Also converts values to their respective internal types.
+                 * Creates a TransactionOptions message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns KeyRange
+                 * @returns TransactionOptions
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.KeyRange;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionOptions;
 
                 /**
-                 * Creates a plain object from a KeyRange message. Also converts values to other types if specified.
-                 * @param message KeyRange
+                 * Creates a plain object from a TransactionOptions message. Also converts values to other types if specified.
+                 * @param message TransactionOptions
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.KeyRange, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.TransactionOptions, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this KeyRange to JSON.
+                 * Converts this TransactionOptions to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for KeyRange
+                 * Gets the default type url for TransactionOptions
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
                 public static getTypeUrl(typeUrlPrefix?: string): string;
             }
 
-            /** Properties of a KeySet. */
-            interface IKeySet {
-
-                /** KeySet keys */
-                keys?: (google.protobuf.IListValue[]|null);
+            namespace TransactionOptions {
 
-                /** KeySet ranges */
-                ranges?: (google.spanner.v1.IKeyRange[]|null);
+                /** Properties of a ReadWrite. */
+                interface IReadWrite {
 
-                /** KeySet all */
-                all?: (boolean|null);
-            }
+                    /** ReadWrite readLockMode */
+                    readLockMode?: (google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode|keyof typeof google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode|null);
 
-            /** Represents a KeySet. */
-            class KeySet implements IKeySet {
+                    /** ReadWrite multiplexedSessionPreviousTransactionId */
+                    multiplexedSessionPreviousTransactionId?: (Uint8Array|string|null);
+                }
 
-                /**
-                 * Constructs a new KeySet.
-                 * @param [properties] Properties to set
-                 */
-                constructor(properties?: google.spanner.v1.IKeySet);
+                /** Represents a ReadWrite. */
+                class ReadWrite implements IReadWrite {
 
-                /** KeySet keys. */
-                public keys: google.protobuf.IListValue[];
+                    /**
+                     * Constructs a new ReadWrite.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.spanner.v1.TransactionOptions.IReadWrite);
 
-                /** KeySet ranges. */
-                public ranges: google.spanner.v1.IKeyRange[];
+                    /** ReadWrite readLockMode. */
+                    public readLockMode: (google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode|keyof typeof google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode);
 
-                /** KeySet all. */
-                public all: boolean;
+                    /** ReadWrite multiplexedSessionPreviousTransactionId. */
+                    public multiplexedSessionPreviousTransactionId: (Uint8Array|string);
 
-                /**
-                 * Creates a new KeySet instance using the specified properties.
-                 * @param [properties] Properties to set
-                 * @returns KeySet instance
-                 */
-                public static create(properties?: google.spanner.v1.IKeySet): google.spanner.v1.KeySet;
+                    /**
+                     * Creates a new ReadWrite instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns ReadWrite instance
+                     */
+                    public static create(properties?: google.spanner.v1.TransactionOptions.IReadWrite): google.spanner.v1.TransactionOptions.ReadWrite;
 
-                /**
-                 * Encodes the specified KeySet message. Does not implicitly {@link google.spanner.v1.KeySet.verify|verify} messages.
-                 * @param message KeySet message or plain object to encode
-                 * @param [writer] Writer to encode to
-                 * @returns Writer
-                 */
-                public static encode(message: google.spanner.v1.IKeySet, writer?: $protobuf.Writer): $protobuf.Writer;
+                    /**
+                     * Encodes the specified ReadWrite message. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadWrite.verify|verify} messages.
+                     * @param message ReadWrite message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encode(message: google.spanner.v1.TransactionOptions.IReadWrite, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                /**
-                 * Encodes the specified KeySet message, length delimited. Does not implicitly {@link google.spanner.v1.KeySet.verify|verify} messages.
-                 * @param message KeySet message or plain object to encode
-                 * @param [writer] Writer to encode to
-                 * @returns Writer
-                 */
-                public static encodeDelimited(message: google.spanner.v1.IKeySet, writer?: $protobuf.Writer): $protobuf.Writer;
+                    /**
+                     * Encodes the specified ReadWrite message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadWrite.verify|verify} messages.
+                     * @param message ReadWrite message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.spanner.v1.TransactionOptions.IReadWrite, writer?: $protobuf.Writer): $protobuf.Writer;
 
-                /**
-                 * Decodes a KeySet message from the specified reader or buffer.
-                 * @param reader Reader or buffer to decode from
-                 * @param [length] Message length if known beforehand
-                 * @returns KeySet
-                 * @throws {Error} If the payload is not a reader or valid buffer
-                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                 */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.KeySet;
+                    /**
+                     * Decodes a ReadWrite message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns ReadWrite
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionOptions.ReadWrite;
 
-                /**
-                 * Decodes a KeySet message from the specified reader or buffer, length delimited.
-                 * @param reader Reader or buffer to decode from
-                 * @returns KeySet
-                 * @throws {Error} If the payload is not a reader or valid buffer
-                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                 */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.KeySet;
+                    /**
+                     * Decodes a ReadWrite message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns ReadWrite
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionOptions.ReadWrite;
 
-                /**
-                 * Verifies a KeySet message.
-                 * @param message Plain object to verify
-                 * @returns `null` if valid, otherwise the reason why it is not
-                 */
-                public static verify(message: { [k: string]: any }): (string|null);
+                    /**
+                     * Verifies a ReadWrite message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
 
-                /**
-                 * Creates a KeySet message from a plain object. Also converts values to their respective internal types.
-                 * @param object Plain object
-                 * @returns KeySet
-                 */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.KeySet;
+                    /**
+                     * Creates a ReadWrite message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns ReadWrite
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionOptions.ReadWrite;
 
-                /**
-                 * Creates a plain object from a KeySet message. Also converts values to other types if specified.
-                 * @param message KeySet
-                 * @param [options] Conversion options
-                 * @returns Plain object
-                 */
-                public static toObject(message: google.spanner.v1.KeySet, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    /**
+                     * Creates a plain object from a ReadWrite message. Also converts values to other types if specified.
+                     * @param message ReadWrite
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.spanner.v1.TransactionOptions.ReadWrite, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
-                /**
-                 * Converts this KeySet to JSON.
-                 * @returns JSON object
-                 */
-                public toJSON(): { [k: string]: any };
+                    /**
+                     * Converts this ReadWrite to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
 
-                /**
-                 * Gets the default type url for KeySet
-                 * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                 * @returns The default type url
-                 */
-                public static getTypeUrl(typeUrlPrefix?: string): string;
-            }
+                    /**
+                     * Gets the default type url for ReadWrite
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
 
-            /** Properties of a Mutation. */
-            interface IMutation {
+                namespace ReadWrite {
 
-                /** Mutation insert */
-                insert?: (google.spanner.v1.Mutation.IWrite|null);
+                    /** ReadLockMode enum. */
+                    enum ReadLockMode {
+                        READ_LOCK_MODE_UNSPECIFIED = 0,
+                        PESSIMISTIC = 1,
+                        OPTIMISTIC = 2
+                    }
+                }
 
-                /** Mutation update */
-                update?: (google.spanner.v1.Mutation.IWrite|null);
+                /** Properties of a PartitionedDml. */
+                interface IPartitionedDml {
+                }
 
-                /** Mutation insertOrUpdate */
-                insertOrUpdate?: (google.spanner.v1.Mutation.IWrite|null);
-
-                /** Mutation replace */
-                replace?: (google.spanner.v1.Mutation.IWrite|null);
-
-                /** Mutation delete */
-                "delete"?: (google.spanner.v1.Mutation.IDelete|null);
-            }
-
-            /** Represents a Mutation. */
-            class Mutation implements IMutation {
-
-                /**
-                 * Constructs a new Mutation.
-                 * @param [properties] Properties to set
-                 */
-                constructor(properties?: google.spanner.v1.IMutation);
-
-                /** Mutation insert. */
-                public insert?: (google.spanner.v1.Mutation.IWrite|null);
-
-                /** Mutation update. */
-                public update?: (google.spanner.v1.Mutation.IWrite|null);
-
-                /** Mutation insertOrUpdate. */
-                public insertOrUpdate?: (google.spanner.v1.Mutation.IWrite|null);
-
-                /** Mutation replace. */
-                public replace?: (google.spanner.v1.Mutation.IWrite|null);
-
-                /** Mutation delete. */
-                public delete?: (google.spanner.v1.Mutation.IDelete|null);
-
-                /** Mutation operation. */
-                public operation?: ("insert"|"update"|"insertOrUpdate"|"replace"|"delete");
-
-                /**
-                 * Creates a new Mutation instance using the specified properties.
-                 * @param [properties] Properties to set
-                 * @returns Mutation instance
-                 */
-                public static create(properties?: google.spanner.v1.IMutation): google.spanner.v1.Mutation;
-
-                /**
-                 * Encodes the specified Mutation message. Does not implicitly {@link google.spanner.v1.Mutation.verify|verify} messages.
-                 * @param message Mutation message or plain object to encode
-                 * @param [writer] Writer to encode to
-                 * @returns Writer
-                 */
-                public static encode(message: google.spanner.v1.IMutation, writer?: $protobuf.Writer): $protobuf.Writer;
-
-                /**
-                 * Encodes the specified Mutation message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.verify|verify} messages.
-                 * @param message Mutation message or plain object to encode
-                 * @param [writer] Writer to encode to
-                 * @returns Writer
-                 */
-                public static encodeDelimited(message: google.spanner.v1.IMutation, writer?: $protobuf.Writer): $protobuf.Writer;
-
-                /**
-                 * Decodes a Mutation message from the specified reader or buffer.
-                 * @param reader Reader or buffer to decode from
-                 * @param [length] Message length if known beforehand
-                 * @returns Mutation
-                 * @throws {Error} If the payload is not a reader or valid buffer
-                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                 */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.Mutation;
-
-                /**
-                 * Decodes a Mutation message from the specified reader or buffer, length delimited.
-                 * @param reader Reader or buffer to decode from
-                 * @returns Mutation
-                 * @throws {Error} If the payload is not a reader or valid buffer
-                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                 */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.Mutation;
-
-                /**
-                 * Verifies a Mutation message.
-                 * @param message Plain object to verify
-                 * @returns `null` if valid, otherwise the reason why it is not
-                 */
-                public static verify(message: { [k: string]: any }): (string|null);
-
-                /**
-                 * Creates a Mutation message from a plain object. Also converts values to their respective internal types.
-                 * @param object Plain object
-                 * @returns Mutation
-                 */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.Mutation;
-
-                /**
-                 * Creates a plain object from a Mutation message. Also converts values to other types if specified.
-                 * @param message Mutation
-                 * @param [options] Conversion options
-                 * @returns Plain object
-                 */
-                public static toObject(message: google.spanner.v1.Mutation, options?: $protobuf.IConversionOptions): { [k: string]: any };
-
-                /**
-                 * Converts this Mutation to JSON.
-                 * @returns JSON object
-                 */
-                public toJSON(): { [k: string]: any };
-
-                /**
-                 * Gets the default type url for Mutation
-                 * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                 * @returns The default type url
-                 */
-                public static getTypeUrl(typeUrlPrefix?: string): string;
-            }
-
-            namespace Mutation {
-
-                /** Properties of a Write. */
-                interface IWrite {
-
-                    /** Write table */
-                    table?: (string|null);
-
-                    /** Write columns */
-                    columns?: (string[]|null);
-
-                    /** Write values */
-                    values?: (google.protobuf.IListValue[]|null);
-                }
-
-                /** Represents a Write. */
-                class Write implements IWrite {
+                /** Represents a PartitionedDml. */
+                class PartitionedDml implements IPartitionedDml {
 
                     /**
-                     * Constructs a new Write.
+                     * Constructs a new PartitionedDml.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.spanner.v1.Mutation.IWrite);
-
-                    /** Write table. */
-                    public table: string;
-
-                    /** Write columns. */
-                    public columns: string[];
-
-                    /** Write values. */
-                    public values: google.protobuf.IListValue[];
+                    constructor(properties?: google.spanner.v1.TransactionOptions.IPartitionedDml);
 
                     /**
-                     * Creates a new Write instance using the specified properties.
+                     * Creates a new PartitionedDml instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns Write instance
+                     * @returns PartitionedDml instance
                      */
-                    public static create(properties?: google.spanner.v1.Mutation.IWrite): google.spanner.v1.Mutation.Write;
+                    public static create(properties?: google.spanner.v1.TransactionOptions.IPartitionedDml): google.spanner.v1.TransactionOptions.PartitionedDml;
 
                     /**
-                     * Encodes the specified Write message. Does not implicitly {@link google.spanner.v1.Mutation.Write.verify|verify} messages.
-                     * @param message Write message or plain object to encode
+                     * Encodes the specified PartitionedDml message. Does not implicitly {@link google.spanner.v1.TransactionOptions.PartitionedDml.verify|verify} messages.
+                     * @param message PartitionedDml message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.spanner.v1.Mutation.IWrite, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.spanner.v1.TransactionOptions.IPartitionedDml, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified Write message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.Write.verify|verify} messages.
-                     * @param message Write message or plain object to encode
+                     * Encodes the specified PartitionedDml message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.PartitionedDml.verify|verify} messages.
+                     * @param message PartitionedDml message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.spanner.v1.Mutation.IWrite, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.spanner.v1.TransactionOptions.IPartitionedDml, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a Write message from the specified reader or buffer.
+                     * Decodes a PartitionedDml message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns Write
+                     * @returns PartitionedDml
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.Mutation.Write;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionOptions.PartitionedDml;
 
                     /**
-                     * Decodes a Write message from the specified reader or buffer, length delimited.
+                     * Decodes a PartitionedDml message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns Write
+                     * @returns PartitionedDml
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.Mutation.Write;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionOptions.PartitionedDml;
 
                     /**
-                     * Verifies a Write message.
+                     * Verifies a PartitionedDml message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a Write message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PartitionedDml message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns Write
+                     * @returns PartitionedDml
                      */
-                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.Mutation.Write;
+                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionOptions.PartitionedDml;
 
                     /**
-                     * Creates a plain object from a Write message. Also converts values to other types if specified.
-                     * @param message Write
+                     * Creates a plain object from a PartitionedDml message. Also converts values to other types if specified.
+                     * @param message PartitionedDml
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.spanner.v1.Mutation.Write, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.spanner.v1.TransactionOptions.PartitionedDml, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this Write to JSON.
+                     * Converts this PartitionedDml to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for Write
+                     * Gets the default type url for PartitionedDml
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a Delete. */
-                interface IDelete {
+                /** Properties of a ReadOnly. */
+                interface IReadOnly {
 
-                    /** Delete table */
-                    table?: (string|null);
+                    /** ReadOnly strong */
+                    strong?: (boolean|null);
 
-                    /** Delete keySet */
-                    keySet?: (google.spanner.v1.IKeySet|null);
+                    /** ReadOnly minReadTimestamp */
+                    minReadTimestamp?: (google.protobuf.ITimestamp|null);
+
+                    /** ReadOnly maxStaleness */
+                    maxStaleness?: (google.protobuf.IDuration|null);
+
+                    /** ReadOnly readTimestamp */
+                    readTimestamp?: (google.protobuf.ITimestamp|null);
+
+                    /** ReadOnly exactStaleness */
+                    exactStaleness?: (google.protobuf.IDuration|null);
+
+                    /** ReadOnly returnReadTimestamp */
+                    returnReadTimestamp?: (boolean|null);
                 }
 
-                /** Represents a Delete. */
-                class Delete implements IDelete {
+                /** Represents a ReadOnly. */
+                class ReadOnly implements IReadOnly {
 
                     /**
-                     * Constructs a new Delete.
+                     * Constructs a new ReadOnly.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.spanner.v1.Mutation.IDelete);
+                    constructor(properties?: google.spanner.v1.TransactionOptions.IReadOnly);
 
-                    /** Delete table. */
-                    public table: string;
+                    /** ReadOnly strong. */
+                    public strong?: (boolean|null);
 
-                    /** Delete keySet. */
-                    public keySet?: (google.spanner.v1.IKeySet|null);
+                    /** ReadOnly minReadTimestamp. */
+                    public minReadTimestamp?: (google.protobuf.ITimestamp|null);
+
+                    /** ReadOnly maxStaleness. */
+                    public maxStaleness?: (google.protobuf.IDuration|null);
+
+                    /** ReadOnly readTimestamp. */
+                    public readTimestamp?: (google.protobuf.ITimestamp|null);
+
+                    /** ReadOnly exactStaleness. */
+                    public exactStaleness?: (google.protobuf.IDuration|null);
+
+                    /** ReadOnly returnReadTimestamp. */
+                    public returnReadTimestamp: boolean;
+
+                    /** ReadOnly timestampBound. */
+                    public timestampBound?: ("strong"|"minReadTimestamp"|"maxStaleness"|"readTimestamp"|"exactStaleness");
 
                     /**
-                     * Creates a new Delete instance using the specified properties.
+                     * Creates a new ReadOnly instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns Delete instance
+                     * @returns ReadOnly instance
                      */
-                    public static create(properties?: google.spanner.v1.Mutation.IDelete): google.spanner.v1.Mutation.Delete;
+                    public static create(properties?: google.spanner.v1.TransactionOptions.IReadOnly): google.spanner.v1.TransactionOptions.ReadOnly;
 
                     /**
-                     * Encodes the specified Delete message. Does not implicitly {@link google.spanner.v1.Mutation.Delete.verify|verify} messages.
-                     * @param message Delete message or plain object to encode
+                     * Encodes the specified ReadOnly message. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadOnly.verify|verify} messages.
+                     * @param message ReadOnly message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.spanner.v1.Mutation.IDelete, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.spanner.v1.TransactionOptions.IReadOnly, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified Delete message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.Delete.verify|verify} messages.
-                     * @param message Delete message or plain object to encode
+                     * Encodes the specified ReadOnly message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadOnly.verify|verify} messages.
+                     * @param message ReadOnly message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.spanner.v1.Mutation.IDelete, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.spanner.v1.TransactionOptions.IReadOnly, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a Delete message from the specified reader or buffer.
+                     * Decodes a ReadOnly message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns Delete
+                     * @returns ReadOnly
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.Mutation.Delete;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionOptions.ReadOnly;
 
                     /**
-                     * Decodes a Delete message from the specified reader or buffer, length delimited.
+                     * Decodes a ReadOnly message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns Delete
+                     * @returns ReadOnly
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.Mutation.Delete;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionOptions.ReadOnly;
 
                     /**
-                     * Verifies a Delete message.
+                     * Verifies a ReadOnly message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a Delete message from a plain object. Also converts values to their respective internal types.
+                     * Creates a ReadOnly message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns Delete
+                     * @returns ReadOnly
                      */
-                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.Mutation.Delete;
+                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionOptions.ReadOnly;
 
                     /**
-                     * Creates a plain object from a Delete message. Also converts values to other types if specified.
-                     * @param message Delete
+                     * Creates a plain object from a ReadOnly message. Also converts values to other types if specified.
+                     * @param message ReadOnly
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.spanner.v1.Mutation.Delete, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.spanner.v1.TransactionOptions.ReadOnly, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this Delete to JSON.
+                     * Converts this ReadOnly to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for Delete
+                     * Gets the default type url for ReadOnly
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
@@ -31848,1357 +32206,1716 @@ export namespace google {
                 }
             }
 
-            /** Properties of a ResultSet. */
-            interface IResultSet {
+            /** Properties of a Transaction. */
+            interface ITransaction {
 
-                /** ResultSet metadata */
-                metadata?: (google.spanner.v1.IResultSetMetadata|null);
+                /** Transaction id */
+                id?: (Uint8Array|string|null);
 
-                /** ResultSet rows */
-                rows?: (google.protobuf.IListValue[]|null);
+                /** Transaction readTimestamp */
+                readTimestamp?: (google.protobuf.ITimestamp|null);
 
-                /** ResultSet stats */
-                stats?: (google.spanner.v1.IResultSetStats|null);
+                /** Transaction precommitToken */
+                precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
             }
 
-            /** Represents a ResultSet. */
-            class ResultSet implements IResultSet {
+            /** Represents a Transaction. */
+            class Transaction implements ITransaction {
 
                 /**
-                 * Constructs a new ResultSet.
+                 * Constructs a new Transaction.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.IResultSet);
+                constructor(properties?: google.spanner.v1.ITransaction);
 
-                /** ResultSet metadata. */
-                public metadata?: (google.spanner.v1.IResultSetMetadata|null);
+                /** Transaction id. */
+                public id: (Uint8Array|string);
 
-                /** ResultSet rows. */
-                public rows: google.protobuf.IListValue[];
+                /** Transaction readTimestamp. */
+                public readTimestamp?: (google.protobuf.ITimestamp|null);
 
-                /** ResultSet stats. */
-                public stats?: (google.spanner.v1.IResultSetStats|null);
+                /** Transaction precommitToken. */
+                public precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
 
                 /**
-                 * Creates a new ResultSet instance using the specified properties.
+                 * Creates a new Transaction instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns ResultSet instance
+                 * @returns Transaction instance
                  */
-                public static create(properties?: google.spanner.v1.IResultSet): google.spanner.v1.ResultSet;
+                public static create(properties?: google.spanner.v1.ITransaction): google.spanner.v1.Transaction;
 
                 /**
-                 * Encodes the specified ResultSet message. Does not implicitly {@link google.spanner.v1.ResultSet.verify|verify} messages.
-                 * @param message ResultSet message or plain object to encode
+                 * Encodes the specified Transaction message. Does not implicitly {@link google.spanner.v1.Transaction.verify|verify} messages.
+                 * @param message Transaction message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.IResultSet, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.ITransaction, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified ResultSet message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSet.verify|verify} messages.
-                 * @param message ResultSet message or plain object to encode
+                 * Encodes the specified Transaction message, length delimited. Does not implicitly {@link google.spanner.v1.Transaction.verify|verify} messages.
+                 * @param message Transaction message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.IResultSet, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.ITransaction, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a ResultSet message from the specified reader or buffer.
+                 * Decodes a Transaction message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns ResultSet
+                 * @returns Transaction
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.ResultSet;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.Transaction;
 
                 /**
-                 * Decodes a ResultSet message from the specified reader or buffer, length delimited.
+                 * Decodes a Transaction message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns ResultSet
+                 * @returns Transaction
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.ResultSet;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.Transaction;
 
                 /**
-                 * Verifies a ResultSet message.
+                 * Verifies a Transaction message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a ResultSet message from a plain object. Also converts values to their respective internal types.
+                 * Creates a Transaction message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns ResultSet
+                 * @returns Transaction
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.ResultSet;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.Transaction;
 
                 /**
-                 * Creates a plain object from a ResultSet message. Also converts values to other types if specified.
-                 * @param message ResultSet
+                 * Creates a plain object from a Transaction message. Also converts values to other types if specified.
+                 * @param message Transaction
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.ResultSet, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.Transaction, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this ResultSet to JSON.
+                 * Converts this Transaction to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for ResultSet
+                 * Gets the default type url for Transaction
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
                 public static getTypeUrl(typeUrlPrefix?: string): string;
             }
 
-            /** Properties of a PartialResultSet. */
-            interface IPartialResultSet {
-
-                /** PartialResultSet metadata */
-                metadata?: (google.spanner.v1.IResultSetMetadata|null);
-
-                /** PartialResultSet values */
-                values?: (google.protobuf.IValue[]|null);
+            /** Properties of a TransactionSelector. */
+            interface ITransactionSelector {
 
-                /** PartialResultSet chunkedValue */
-                chunkedValue?: (boolean|null);
+                /** TransactionSelector singleUse */
+                singleUse?: (google.spanner.v1.ITransactionOptions|null);
 
-                /** PartialResultSet resumeToken */
-                resumeToken?: (Uint8Array|string|null);
+                /** TransactionSelector id */
+                id?: (Uint8Array|string|null);
 
-                /** PartialResultSet stats */
-                stats?: (google.spanner.v1.IResultSetStats|null);
+                /** TransactionSelector begin */
+                begin?: (google.spanner.v1.ITransactionOptions|null);
             }
 
-            /** Represents a PartialResultSet. */
-            class PartialResultSet implements IPartialResultSet {
+            /** Represents a TransactionSelector. */
+            class TransactionSelector implements ITransactionSelector {
 
                 /**
-                 * Constructs a new PartialResultSet.
+                 * Constructs a new TransactionSelector.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.IPartialResultSet);
-
-                /** PartialResultSet metadata. */
-                public metadata?: (google.spanner.v1.IResultSetMetadata|null);
+                constructor(properties?: google.spanner.v1.ITransactionSelector);
 
-                /** PartialResultSet values. */
-                public values: google.protobuf.IValue[];
+                /** TransactionSelector singleUse. */
+                public singleUse?: (google.spanner.v1.ITransactionOptions|null);
 
-                /** PartialResultSet chunkedValue. */
-                public chunkedValue: boolean;
+                /** TransactionSelector id. */
+                public id?: (Uint8Array|string|null);
 
-                /** PartialResultSet resumeToken. */
-                public resumeToken: (Uint8Array|string);
+                /** TransactionSelector begin. */
+                public begin?: (google.spanner.v1.ITransactionOptions|null);
 
-                /** PartialResultSet stats. */
-                public stats?: (google.spanner.v1.IResultSetStats|null);
+                /** TransactionSelector selector. */
+                public selector?: ("singleUse"|"id"|"begin");
 
                 /**
-                 * Creates a new PartialResultSet instance using the specified properties.
+                 * Creates a new TransactionSelector instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns PartialResultSet instance
+                 * @returns TransactionSelector instance
                  */
-                public static create(properties?: google.spanner.v1.IPartialResultSet): google.spanner.v1.PartialResultSet;
+                public static create(properties?: google.spanner.v1.ITransactionSelector): google.spanner.v1.TransactionSelector;
 
                 /**
-                 * Encodes the specified PartialResultSet message. Does not implicitly {@link google.spanner.v1.PartialResultSet.verify|verify} messages.
-                 * @param message PartialResultSet message or plain object to encode
+                 * Encodes the specified TransactionSelector message. Does not implicitly {@link google.spanner.v1.TransactionSelector.verify|verify} messages.
+                 * @param message TransactionSelector message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.IPartialResultSet, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.ITransactionSelector, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified PartialResultSet message, length delimited. Does not implicitly {@link google.spanner.v1.PartialResultSet.verify|verify} messages.
-                 * @param message PartialResultSet message or plain object to encode
+                 * Encodes the specified TransactionSelector message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionSelector.verify|verify} messages.
+                 * @param message TransactionSelector message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.IPartialResultSet, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.ITransactionSelector, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a PartialResultSet message from the specified reader or buffer.
+                 * Decodes a TransactionSelector message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns PartialResultSet
+                 * @returns TransactionSelector
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.PartialResultSet;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionSelector;
 
                 /**
-                 * Decodes a PartialResultSet message from the specified reader or buffer, length delimited.
+                 * Decodes a TransactionSelector message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns PartialResultSet
+                 * @returns TransactionSelector
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.PartialResultSet;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionSelector;
 
                 /**
-                 * Verifies a PartialResultSet message.
+                 * Verifies a TransactionSelector message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a PartialResultSet message from a plain object. Also converts values to their respective internal types.
+                 * Creates a TransactionSelector message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns PartialResultSet
+                 * @returns TransactionSelector
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.PartialResultSet;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionSelector;
 
                 /**
-                 * Creates a plain object from a PartialResultSet message. Also converts values to other types if specified.
-                 * @param message PartialResultSet
+                 * Creates a plain object from a TransactionSelector message. Also converts values to other types if specified.
+                 * @param message TransactionSelector
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.PartialResultSet, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.TransactionSelector, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this PartialResultSet to JSON.
+                 * Converts this TransactionSelector to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for PartialResultSet
+                 * Gets the default type url for TransactionSelector
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
                 public static getTypeUrl(typeUrlPrefix?: string): string;
             }
 
-            /** Properties of a ResultSetMetadata. */
-            interface IResultSetMetadata {
-
-                /** ResultSetMetadata rowType */
-                rowType?: (google.spanner.v1.IStructType|null);
+            /** Properties of a MultiplexedSessionPrecommitToken. */
+            interface IMultiplexedSessionPrecommitToken {
 
-                /** ResultSetMetadata transaction */
-                transaction?: (google.spanner.v1.ITransaction|null);
+                /** MultiplexedSessionPrecommitToken precommitToken */
+                precommitToken?: (Uint8Array|string|null);
 
-                /** ResultSetMetadata undeclaredParameters */
-                undeclaredParameters?: (google.spanner.v1.IStructType|null);
+                /** MultiplexedSessionPrecommitToken seqNum */
+                seqNum?: (number|null);
             }
 
-            /** Represents a ResultSetMetadata. */
-            class ResultSetMetadata implements IResultSetMetadata {
+            /** Represents a MultiplexedSessionPrecommitToken. */
+            class MultiplexedSessionPrecommitToken implements IMultiplexedSessionPrecommitToken {
 
                 /**
-                 * Constructs a new ResultSetMetadata.
+                 * Constructs a new MultiplexedSessionPrecommitToken.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.IResultSetMetadata);
+                constructor(properties?: google.spanner.v1.IMultiplexedSessionPrecommitToken);
 
-                /** ResultSetMetadata rowType. */
-                public rowType?: (google.spanner.v1.IStructType|null);
-
-                /** ResultSetMetadata transaction. */
-                public transaction?: (google.spanner.v1.ITransaction|null);
+                /** MultiplexedSessionPrecommitToken precommitToken. */
+                public precommitToken: (Uint8Array|string);
 
-                /** ResultSetMetadata undeclaredParameters. */
-                public undeclaredParameters?: (google.spanner.v1.IStructType|null);
+                /** MultiplexedSessionPrecommitToken seqNum. */
+                public seqNum: number;
 
                 /**
-                 * Creates a new ResultSetMetadata instance using the specified properties.
+                 * Creates a new MultiplexedSessionPrecommitToken instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns ResultSetMetadata instance
+                 * @returns MultiplexedSessionPrecommitToken instance
                  */
-                public static create(properties?: google.spanner.v1.IResultSetMetadata): google.spanner.v1.ResultSetMetadata;
+                public static create(properties?: google.spanner.v1.IMultiplexedSessionPrecommitToken): google.spanner.v1.MultiplexedSessionPrecommitToken;
 
                 /**
-                 * Encodes the specified ResultSetMetadata message. Does not implicitly {@link google.spanner.v1.ResultSetMetadata.verify|verify} messages.
-                 * @param message ResultSetMetadata message or plain object to encode
+                 * Encodes the specified MultiplexedSessionPrecommitToken message. Does not implicitly {@link google.spanner.v1.MultiplexedSessionPrecommitToken.verify|verify} messages.
+                 * @param message MultiplexedSessionPrecommitToken message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.IResultSetMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.IMultiplexedSessionPrecommitToken, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified ResultSetMetadata message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSetMetadata.verify|verify} messages.
-                 * @param message ResultSetMetadata message or plain object to encode
+                 * Encodes the specified MultiplexedSessionPrecommitToken message, length delimited. Does not implicitly {@link google.spanner.v1.MultiplexedSessionPrecommitToken.verify|verify} messages.
+                 * @param message MultiplexedSessionPrecommitToken message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.IResultSetMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.IMultiplexedSessionPrecommitToken, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a ResultSetMetadata message from the specified reader or buffer.
+                 * Decodes a MultiplexedSessionPrecommitToken message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns ResultSetMetadata
+                 * @returns MultiplexedSessionPrecommitToken
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.ResultSetMetadata;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.MultiplexedSessionPrecommitToken;
 
                 /**
-                 * Decodes a ResultSetMetadata message from the specified reader or buffer, length delimited.
+                 * Decodes a MultiplexedSessionPrecommitToken message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns ResultSetMetadata
+                 * @returns MultiplexedSessionPrecommitToken
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.ResultSetMetadata;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.MultiplexedSessionPrecommitToken;
 
                 /**
-                 * Verifies a ResultSetMetadata message.
+                 * Verifies a MultiplexedSessionPrecommitToken message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a ResultSetMetadata message from a plain object. Also converts values to their respective internal types.
+                 * Creates a MultiplexedSessionPrecommitToken message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns ResultSetMetadata
+                 * @returns MultiplexedSessionPrecommitToken
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.ResultSetMetadata;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.MultiplexedSessionPrecommitToken;
 
                 /**
-                 * Creates a plain object from a ResultSetMetadata message. Also converts values to other types if specified.
-                 * @param message ResultSetMetadata
+                 * Creates a plain object from a MultiplexedSessionPrecommitToken message. Also converts values to other types if specified.
+                 * @param message MultiplexedSessionPrecommitToken
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.ResultSetMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.MultiplexedSessionPrecommitToken, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this ResultSetMetadata to JSON.
+                 * Converts this MultiplexedSessionPrecommitToken to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for ResultSetMetadata
+                 * Gets the default type url for MultiplexedSessionPrecommitToken
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
                 public static getTypeUrl(typeUrlPrefix?: string): string;
             }
 
-            /** Properties of a ResultSetStats. */
-            interface IResultSetStats {
+            /** Properties of a KeyRange. */
+            interface IKeyRange {
 
-                /** ResultSetStats queryPlan */
-                queryPlan?: (google.spanner.v1.IQueryPlan|null);
+                /** KeyRange startClosed */
+                startClosed?: (google.protobuf.IListValue|null);
 
-                /** ResultSetStats queryStats */
-                queryStats?: (google.protobuf.IStruct|null);
+                /** KeyRange startOpen */
+                startOpen?: (google.protobuf.IListValue|null);
 
-                /** ResultSetStats rowCountExact */
-                rowCountExact?: (number|Long|string|null);
+                /** KeyRange endClosed */
+                endClosed?: (google.protobuf.IListValue|null);
 
-                /** ResultSetStats rowCountLowerBound */
-                rowCountLowerBound?: (number|Long|string|null);
+                /** KeyRange endOpen */
+                endOpen?: (google.protobuf.IListValue|null);
             }
 
-            /** Represents a ResultSetStats. */
-            class ResultSetStats implements IResultSetStats {
+            /** Represents a KeyRange. */
+            class KeyRange implements IKeyRange {
 
                 /**
-                 * Constructs a new ResultSetStats.
+                 * Constructs a new KeyRange.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.IResultSetStats);
+                constructor(properties?: google.spanner.v1.IKeyRange);
 
-                /** ResultSetStats queryPlan. */
-                public queryPlan?: (google.spanner.v1.IQueryPlan|null);
+                /** KeyRange startClosed. */
+                public startClosed?: (google.protobuf.IListValue|null);
 
-                /** ResultSetStats queryStats. */
-                public queryStats?: (google.protobuf.IStruct|null);
+                /** KeyRange startOpen. */
+                public startOpen?: (google.protobuf.IListValue|null);
 
-                /** ResultSetStats rowCountExact. */
-                public rowCountExact?: (number|Long|string|null);
+                /** KeyRange endClosed. */
+                public endClosed?: (google.protobuf.IListValue|null);
 
-                /** ResultSetStats rowCountLowerBound. */
-                public rowCountLowerBound?: (number|Long|string|null);
+                /** KeyRange endOpen. */
+                public endOpen?: (google.protobuf.IListValue|null);
 
-                /** ResultSetStats rowCount. */
-                public rowCount?: ("rowCountExact"|"rowCountLowerBound");
+                /** KeyRange startKeyType. */
+                public startKeyType?: ("startClosed"|"startOpen");
+
+                /** KeyRange endKeyType. */
+                public endKeyType?: ("endClosed"|"endOpen");
 
                 /**
-                 * Creates a new ResultSetStats instance using the specified properties.
+                 * Creates a new KeyRange instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns ResultSetStats instance
+                 * @returns KeyRange instance
                  */
-                public static create(properties?: google.spanner.v1.IResultSetStats): google.spanner.v1.ResultSetStats;
+                public static create(properties?: google.spanner.v1.IKeyRange): google.spanner.v1.KeyRange;
 
                 /**
-                 * Encodes the specified ResultSetStats message. Does not implicitly {@link google.spanner.v1.ResultSetStats.verify|verify} messages.
-                 * @param message ResultSetStats message or plain object to encode
+                 * Encodes the specified KeyRange message. Does not implicitly {@link google.spanner.v1.KeyRange.verify|verify} messages.
+                 * @param message KeyRange message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.IResultSetStats, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.IKeyRange, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified ResultSetStats message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSetStats.verify|verify} messages.
-                 * @param message ResultSetStats message or plain object to encode
+                 * Encodes the specified KeyRange message, length delimited. Does not implicitly {@link google.spanner.v1.KeyRange.verify|verify} messages.
+                 * @param message KeyRange message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.IResultSetStats, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.IKeyRange, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a ResultSetStats message from the specified reader or buffer.
+                 * Decodes a KeyRange message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns ResultSetStats
+                 * @returns KeyRange
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.ResultSetStats;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.KeyRange;
 
                 /**
-                 * Decodes a ResultSetStats message from the specified reader or buffer, length delimited.
+                 * Decodes a KeyRange message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns ResultSetStats
+                 * @returns KeyRange
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.ResultSetStats;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.KeyRange;
 
                 /**
-                 * Verifies a ResultSetStats message.
+                 * Verifies a KeyRange message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a ResultSetStats message from a plain object. Also converts values to their respective internal types.
+                 * Creates a KeyRange message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns ResultSetStats
+                 * @returns KeyRange
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.ResultSetStats;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.KeyRange;
 
                 /**
-                 * Creates a plain object from a ResultSetStats message. Also converts values to other types if specified.
-                 * @param message ResultSetStats
+                 * Creates a plain object from a KeyRange message. Also converts values to other types if specified.
+                 * @param message KeyRange
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.ResultSetStats, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.KeyRange, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this ResultSetStats to JSON.
+                 * Converts this KeyRange to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for ResultSetStats
+                 * Gets the default type url for KeyRange
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
                 public static getTypeUrl(typeUrlPrefix?: string): string;
             }
 
-            /** Properties of a PlanNode. */
-            interface IPlanNode {
-
-                /** PlanNode index */
-                index?: (number|null);
-
-                /** PlanNode kind */
-                kind?: (google.spanner.v1.PlanNode.Kind|keyof typeof google.spanner.v1.PlanNode.Kind|null);
-
-                /** PlanNode displayName */
-                displayName?: (string|null);
-
-                /** PlanNode childLinks */
-                childLinks?: (google.spanner.v1.PlanNode.IChildLink[]|null);
+            /** Properties of a KeySet. */
+            interface IKeySet {
 
-                /** PlanNode shortRepresentation */
-                shortRepresentation?: (google.spanner.v1.PlanNode.IShortRepresentation|null);
+                /** KeySet keys */
+                keys?: (google.protobuf.IListValue[]|null);
 
-                /** PlanNode metadata */
-                metadata?: (google.protobuf.IStruct|null);
+                /** KeySet ranges */
+                ranges?: (google.spanner.v1.IKeyRange[]|null);
 
-                /** PlanNode executionStats */
-                executionStats?: (google.protobuf.IStruct|null);
+                /** KeySet all */
+                all?: (boolean|null);
             }
 
-            /** Represents a PlanNode. */
-            class PlanNode implements IPlanNode {
+            /** Represents a KeySet. */
+            class KeySet implements IKeySet {
 
                 /**
-                 * Constructs a new PlanNode.
+                 * Constructs a new KeySet.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.IPlanNode);
-
-                /** PlanNode index. */
-                public index: number;
-
-                /** PlanNode kind. */
-                public kind: (google.spanner.v1.PlanNode.Kind|keyof typeof google.spanner.v1.PlanNode.Kind);
-
-                /** PlanNode displayName. */
-                public displayName: string;
-
-                /** PlanNode childLinks. */
-                public childLinks: google.spanner.v1.PlanNode.IChildLink[];
+                constructor(properties?: google.spanner.v1.IKeySet);
 
-                /** PlanNode shortRepresentation. */
-                public shortRepresentation?: (google.spanner.v1.PlanNode.IShortRepresentation|null);
+                /** KeySet keys. */
+                public keys: google.protobuf.IListValue[];
 
-                /** PlanNode metadata. */
-                public metadata?: (google.protobuf.IStruct|null);
+                /** KeySet ranges. */
+                public ranges: google.spanner.v1.IKeyRange[];
 
-                /** PlanNode executionStats. */
-                public executionStats?: (google.protobuf.IStruct|null);
+                /** KeySet all. */
+                public all: boolean;
 
                 /**
-                 * Creates a new PlanNode instance using the specified properties.
+                 * Creates a new KeySet instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns PlanNode instance
+                 * @returns KeySet instance
                  */
-                public static create(properties?: google.spanner.v1.IPlanNode): google.spanner.v1.PlanNode;
+                public static create(properties?: google.spanner.v1.IKeySet): google.spanner.v1.KeySet;
 
                 /**
-                 * Encodes the specified PlanNode message. Does not implicitly {@link google.spanner.v1.PlanNode.verify|verify} messages.
-                 * @param message PlanNode message or plain object to encode
+                 * Encodes the specified KeySet message. Does not implicitly {@link google.spanner.v1.KeySet.verify|verify} messages.
+                 * @param message KeySet message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.IPlanNode, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.IKeySet, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified PlanNode message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.verify|verify} messages.
-                 * @param message PlanNode message or plain object to encode
+                 * Encodes the specified KeySet message, length delimited. Does not implicitly {@link google.spanner.v1.KeySet.verify|verify} messages.
+                 * @param message KeySet message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.IPlanNode, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.IKeySet, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a PlanNode message from the specified reader or buffer.
+                 * Decodes a KeySet message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns PlanNode
+                 * @returns KeySet
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.PlanNode;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.KeySet;
 
                 /**
-                 * Decodes a PlanNode message from the specified reader or buffer, length delimited.
+                 * Decodes a KeySet message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns PlanNode
+                 * @returns KeySet
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.PlanNode;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.KeySet;
 
                 /**
-                 * Verifies a PlanNode message.
+                 * Verifies a KeySet message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a PlanNode message from a plain object. Also converts values to their respective internal types.
+                 * Creates a KeySet message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns PlanNode
+                 * @returns KeySet
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.PlanNode;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.KeySet;
 
                 /**
-                 * Creates a plain object from a PlanNode message. Also converts values to other types if specified.
-                 * @param message PlanNode
+                 * Creates a plain object from a KeySet message. Also converts values to other types if specified.
+                 * @param message KeySet
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.PlanNode, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.KeySet, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this PlanNode to JSON.
+                 * Converts this KeySet to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for PlanNode
+                 * Gets the default type url for KeySet
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
                 public static getTypeUrl(typeUrlPrefix?: string): string;
             }
 
-            namespace PlanNode {
-
-                /** Kind enum. */
-                enum Kind {
-                    KIND_UNSPECIFIED = 0,
-                    RELATIONAL = 1,
-                    SCALAR = 2
-                }
-
-                /** Properties of a ChildLink. */
-                interface IChildLink {
+            /** Properties of a Mutation. */
+            interface IMutation {
 
-                    /** ChildLink childIndex */
-                    childIndex?: (number|null);
+                /** Mutation insert */
+                insert?: (google.spanner.v1.Mutation.IWrite|null);
 
-                    /** ChildLink type */
-                    type?: (string|null);
+                /** Mutation update */
+                update?: (google.spanner.v1.Mutation.IWrite|null);
 
-                    /** ChildLink variable */
-                    variable?: (string|null);
-                }
+                /** Mutation insertOrUpdate */
+                insertOrUpdate?: (google.spanner.v1.Mutation.IWrite|null);
 
-                /** Represents a ChildLink. */
-                class ChildLink implements IChildLink {
+                /** Mutation replace */
+                replace?: (google.spanner.v1.Mutation.IWrite|null);
 
-                    /**
-                     * Constructs a new ChildLink.
-                     * @param [properties] Properties to set
-                     */
-                    constructor(properties?: google.spanner.v1.PlanNode.IChildLink);
+                /** Mutation delete */
+                "delete"?: (google.spanner.v1.Mutation.IDelete|null);
+            }
 
-                    /** ChildLink childIndex. */
-                    public childIndex: number;
+            /** Represents a Mutation. */
+            class Mutation implements IMutation {
 
-                    /** ChildLink type. */
-                    public type: string;
+                /**
+                 * Constructs a new Mutation.
+                 * @param [properties] Properties to set
+                 */
+                constructor(properties?: google.spanner.v1.IMutation);
 
-                    /** ChildLink variable. */
-                    public variable: string;
+                /** Mutation insert. */
+                public insert?: (google.spanner.v1.Mutation.IWrite|null);
+
+                /** Mutation update. */
+                public update?: (google.spanner.v1.Mutation.IWrite|null);
+
+                /** Mutation insertOrUpdate. */
+                public insertOrUpdate?: (google.spanner.v1.Mutation.IWrite|null);
+
+                /** Mutation replace. */
+                public replace?: (google.spanner.v1.Mutation.IWrite|null);
+
+                /** Mutation delete. */
+                public delete?: (google.spanner.v1.Mutation.IDelete|null);
+
+                /** Mutation operation. */
+                public operation?: ("insert"|"update"|"insertOrUpdate"|"replace"|"delete");
+
+                /**
+                 * Creates a new Mutation instance using the specified properties.
+                 * @param [properties] Properties to set
+                 * @returns Mutation instance
+                 */
+                public static create(properties?: google.spanner.v1.IMutation): google.spanner.v1.Mutation;
+
+                /**
+                 * Encodes the specified Mutation message. Does not implicitly {@link google.spanner.v1.Mutation.verify|verify} messages.
+                 * @param message Mutation message or plain object to encode
+                 * @param [writer] Writer to encode to
+                 * @returns Writer
+                 */
+                public static encode(message: google.spanner.v1.IMutation, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                /**
+                 * Encodes the specified Mutation message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.verify|verify} messages.
+                 * @param message Mutation message or plain object to encode
+                 * @param [writer] Writer to encode to
+                 * @returns Writer
+                 */
+                public static encodeDelimited(message: google.spanner.v1.IMutation, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                /**
+                 * Decodes a Mutation message from the specified reader or buffer.
+                 * @param reader Reader or buffer to decode from
+                 * @param [length] Message length if known beforehand
+                 * @returns Mutation
+                 * @throws {Error} If the payload is not a reader or valid buffer
+                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                 */
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.Mutation;
+
+                /**
+                 * Decodes a Mutation message from the specified reader or buffer, length delimited.
+                 * @param reader Reader or buffer to decode from
+                 * @returns Mutation
+                 * @throws {Error} If the payload is not a reader or valid buffer
+                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                 */
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.Mutation;
+
+                /**
+                 * Verifies a Mutation message.
+                 * @param message Plain object to verify
+                 * @returns `null` if valid, otherwise the reason why it is not
+                 */
+                public static verify(message: { [k: string]: any }): (string|null);
+
+                /**
+                 * Creates a Mutation message from a plain object. Also converts values to their respective internal types.
+                 * @param object Plain object
+                 * @returns Mutation
+                 */
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.Mutation;
+
+                /**
+                 * Creates a plain object from a Mutation message. Also converts values to other types if specified.
+                 * @param message Mutation
+                 * @param [options] Conversion options
+                 * @returns Plain object
+                 */
+                public static toObject(message: google.spanner.v1.Mutation, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                /**
+                 * Converts this Mutation to JSON.
+                 * @returns JSON object
+                 */
+                public toJSON(): { [k: string]: any };
+
+                /**
+                 * Gets the default type url for Mutation
+                 * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                 * @returns The default type url
+                 */
+                public static getTypeUrl(typeUrlPrefix?: string): string;
+            }
+
+            namespace Mutation {
+
+                /** Properties of a Write. */
+                interface IWrite {
+
+                    /** Write table */
+                    table?: (string|null);
+
+                    /** Write columns */
+                    columns?: (string[]|null);
+
+                    /** Write values */
+                    values?: (google.protobuf.IListValue[]|null);
+                }
+
+                /** Represents a Write. */
+                class Write implements IWrite {
 
                     /**
-                     * Creates a new ChildLink instance using the specified properties.
+                     * Constructs a new Write.
                      * @param [properties] Properties to set
-                     * @returns ChildLink instance
                      */
-                    public static create(properties?: google.spanner.v1.PlanNode.IChildLink): google.spanner.v1.PlanNode.ChildLink;
+                    constructor(properties?: google.spanner.v1.Mutation.IWrite);
+
+                    /** Write table. */
+                    public table: string;
+
+                    /** Write columns. */
+                    public columns: string[];
+
+                    /** Write values. */
+                    public values: google.protobuf.IListValue[];
 
                     /**
-                     * Encodes the specified ChildLink message. Does not implicitly {@link google.spanner.v1.PlanNode.ChildLink.verify|verify} messages.
-                     * @param message ChildLink message or plain object to encode
+                     * Creates a new Write instance using the specified properties.
+                     * @param [properties] Properties to set
+                     * @returns Write instance
+                     */
+                    public static create(properties?: google.spanner.v1.Mutation.IWrite): google.spanner.v1.Mutation.Write;
+
+                    /**
+                     * Encodes the specified Write message. Does not implicitly {@link google.spanner.v1.Mutation.Write.verify|verify} messages.
+                     * @param message Write message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.spanner.v1.PlanNode.IChildLink, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.spanner.v1.Mutation.IWrite, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ChildLink message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.ChildLink.verify|verify} messages.
-                     * @param message ChildLink message or plain object to encode
+                     * Encodes the specified Write message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.Write.verify|verify} messages.
+                     * @param message Write message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.spanner.v1.PlanNode.IChildLink, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.spanner.v1.Mutation.IWrite, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a ChildLink message from the specified reader or buffer.
+                     * Decodes a Write message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ChildLink
+                     * @returns Write
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.PlanNode.ChildLink;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.Mutation.Write;
 
                     /**
-                     * Decodes a ChildLink message from the specified reader or buffer, length delimited.
+                     * Decodes a Write message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ChildLink
+                     * @returns Write
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.PlanNode.ChildLink;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.Mutation.Write;
 
                     /**
-                     * Verifies a ChildLink message.
+                     * Verifies a Write message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a ChildLink message from a plain object. Also converts values to their respective internal types.
+                     * Creates a Write message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ChildLink
+                     * @returns Write
                      */
-                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.PlanNode.ChildLink;
+                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.Mutation.Write;
 
                     /**
-                     * Creates a plain object from a ChildLink message. Also converts values to other types if specified.
-                     * @param message ChildLink
+                     * Creates a plain object from a Write message. Also converts values to other types if specified.
+                     * @param message Write
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.spanner.v1.PlanNode.ChildLink, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.spanner.v1.Mutation.Write, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ChildLink to JSON.
+                     * Converts this Write to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ChildLink
+                     * Gets the default type url for Write
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a ShortRepresentation. */
-                interface IShortRepresentation {
+                /** Properties of a Delete. */
+                interface IDelete {
 
-                    /** ShortRepresentation description */
-                    description?: (string|null);
+                    /** Delete table */
+                    table?: (string|null);
 
-                    /** ShortRepresentation subqueries */
-                    subqueries?: ({ [k: string]: number }|null);
+                    /** Delete keySet */
+                    keySet?: (google.spanner.v1.IKeySet|null);
                 }
 
-                /** Represents a ShortRepresentation. */
-                class ShortRepresentation implements IShortRepresentation {
+                /** Represents a Delete. */
+                class Delete implements IDelete {
 
                     /**
-                     * Constructs a new ShortRepresentation.
+                     * Constructs a new Delete.
                      * @param [properties] Properties to set
                      */
-                    constructor(properties?: google.spanner.v1.PlanNode.IShortRepresentation);
+                    constructor(properties?: google.spanner.v1.Mutation.IDelete);
 
-                    /** ShortRepresentation description. */
-                    public description: string;
+                    /** Delete table. */
+                    public table: string;
 
-                    /** ShortRepresentation subqueries. */
-                    public subqueries: { [k: string]: number };
+                    /** Delete keySet. */
+                    public keySet?: (google.spanner.v1.IKeySet|null);
 
                     /**
-                     * Creates a new ShortRepresentation instance using the specified properties.
+                     * Creates a new Delete instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ShortRepresentation instance
+                     * @returns Delete instance
                      */
-                    public static create(properties?: google.spanner.v1.PlanNode.IShortRepresentation): google.spanner.v1.PlanNode.ShortRepresentation;
+                    public static create(properties?: google.spanner.v1.Mutation.IDelete): google.spanner.v1.Mutation.Delete;
 
                     /**
-                     * Encodes the specified ShortRepresentation message. Does not implicitly {@link google.spanner.v1.PlanNode.ShortRepresentation.verify|verify} messages.
-                     * @param message ShortRepresentation message or plain object to encode
+                     * Encodes the specified Delete message. Does not implicitly {@link google.spanner.v1.Mutation.Delete.verify|verify} messages.
+                     * @param message Delete message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.spanner.v1.PlanNode.IShortRepresentation, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.spanner.v1.Mutation.IDelete, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Encodes the specified Delete message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.Delete.verify|verify} messages.
+                     * @param message Delete message or plain object to encode
+                     * @param [writer] Writer to encode to
+                     * @returns Writer
+                     */
+                    public static encodeDelimited(message: google.spanner.v1.Mutation.IDelete, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                    /**
+                     * Decodes a Delete message from the specified reader or buffer.
+                     * @param reader Reader or buffer to decode from
+                     * @param [length] Message length if known beforehand
+                     * @returns Delete
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.Mutation.Delete;
+
+                    /**
+                     * Decodes a Delete message from the specified reader or buffer, length delimited.
+                     * @param reader Reader or buffer to decode from
+                     * @returns Delete
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.Mutation.Delete;
+
+                    /**
+                     * Verifies a Delete message.
+                     * @param message Plain object to verify
+                     * @returns `null` if valid, otherwise the reason why it is not
+                     */
+                    public static verify(message: { [k: string]: any }): (string|null);
+
+                    /**
+                     * Creates a Delete message from a plain object. Also converts values to their respective internal types.
+                     * @param object Plain object
+                     * @returns Delete
+                     */
+                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.Mutation.Delete;
+
+                    /**
+                     * Creates a plain object from a Delete message. Also converts values to other types if specified.
+                     * @param message Delete
+                     * @param [options] Conversion options
+                     * @returns Plain object
+                     */
+                    public static toObject(message: google.spanner.v1.Mutation.Delete, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                    /**
+                     * Converts this Delete to JSON.
+                     * @returns JSON object
+                     */
+                    public toJSON(): { [k: string]: any };
+
+                    /**
+                     * Gets the default type url for Delete
+                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns The default type url
+                     */
+                    public static getTypeUrl(typeUrlPrefix?: string): string;
+                }
+            }
+
+            /** Properties of a ResultSet. */
+            interface IResultSet {
+
+                /** ResultSet metadata */
+                metadata?: (google.spanner.v1.IResultSetMetadata|null);
+
+                /** ResultSet rows */
+                rows?: (google.protobuf.IListValue[]|null);
+
+                /** ResultSet stats */
+                stats?: (google.spanner.v1.IResultSetStats|null);
+
+                /** ResultSet precommitToken */
+                precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
+            }
+
+            /** Represents a ResultSet. */
+            class ResultSet implements IResultSet {
+
+                /**
+                 * Constructs a new ResultSet.
+                 * @param [properties] Properties to set
+                 */
+                constructor(properties?: google.spanner.v1.IResultSet);
+
+                /** ResultSet metadata. */
+                public metadata?: (google.spanner.v1.IResultSetMetadata|null);
+
+                /** ResultSet rows. */
+                public rows: google.protobuf.IListValue[];
+
+                /** ResultSet stats. */
+                public stats?: (google.spanner.v1.IResultSetStats|null);
+
+                /** ResultSet precommitToken. */
+                public precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
+
+                /**
+                 * Creates a new ResultSet instance using the specified properties.
+                 * @param [properties] Properties to set
+                 * @returns ResultSet instance
+                 */
+                public static create(properties?: google.spanner.v1.IResultSet): google.spanner.v1.ResultSet;
+
+                /**
+                 * Encodes the specified ResultSet message. Does not implicitly {@link google.spanner.v1.ResultSet.verify|verify} messages.
+                 * @param message ResultSet message or plain object to encode
+                 * @param [writer] Writer to encode to
+                 * @returns Writer
+                 */
+                public static encode(message: google.spanner.v1.IResultSet, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                /**
+                 * Encodes the specified ResultSet message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSet.verify|verify} messages.
+                 * @param message ResultSet message or plain object to encode
+                 * @param [writer] Writer to encode to
+                 * @returns Writer
+                 */
+                public static encodeDelimited(message: google.spanner.v1.IResultSet, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                /**
+                 * Decodes a ResultSet message from the specified reader or buffer.
+                 * @param reader Reader or buffer to decode from
+                 * @param [length] Message length if known beforehand
+                 * @returns ResultSet
+                 * @throws {Error} If the payload is not a reader or valid buffer
+                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                 */
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.ResultSet;
+
+                /**
+                 * Decodes a ResultSet message from the specified reader or buffer, length delimited.
+                 * @param reader Reader or buffer to decode from
+                 * @returns ResultSet
+                 * @throws {Error} If the payload is not a reader or valid buffer
+                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                 */
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.ResultSet;
+
+                /**
+                 * Verifies a ResultSet message.
+                 * @param message Plain object to verify
+                 * @returns `null` if valid, otherwise the reason why it is not
+                 */
+                public static verify(message: { [k: string]: any }): (string|null);
+
+                /**
+                 * Creates a ResultSet message from a plain object. Also converts values to their respective internal types.
+                 * @param object Plain object
+                 * @returns ResultSet
+                 */
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.ResultSet;
+
+                /**
+                 * Creates a plain object from a ResultSet message. Also converts values to other types if specified.
+                 * @param message ResultSet
+                 * @param [options] Conversion options
+                 * @returns Plain object
+                 */
+                public static toObject(message: google.spanner.v1.ResultSet, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                /**
+                 * Converts this ResultSet to JSON.
+                 * @returns JSON object
+                 */
+                public toJSON(): { [k: string]: any };
+
+                /**
+                 * Gets the default type url for ResultSet
+                 * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                 * @returns The default type url
+                 */
+                public static getTypeUrl(typeUrlPrefix?: string): string;
+            }
+
+            /** Properties of a PartialResultSet. */
+            interface IPartialResultSet {
+
+                /** PartialResultSet metadata */
+                metadata?: (google.spanner.v1.IResultSetMetadata|null);
+
+                /** PartialResultSet values */
+                values?: (google.protobuf.IValue[]|null);
+
+                /** PartialResultSet chunkedValue */
+                chunkedValue?: (boolean|null);
+
+                /** PartialResultSet resumeToken */
+                resumeToken?: (Uint8Array|string|null);
+
+                /** PartialResultSet stats */
+                stats?: (google.spanner.v1.IResultSetStats|null);
+
+                /** PartialResultSet precommitToken */
+                precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
+            }
+
+            /** Represents a PartialResultSet. */
+            class PartialResultSet implements IPartialResultSet {
+
+                /**
+                 * Constructs a new PartialResultSet.
+                 * @param [properties] Properties to set
+                 */
+                constructor(properties?: google.spanner.v1.IPartialResultSet);
+
+                /** PartialResultSet metadata. */
+                public metadata?: (google.spanner.v1.IResultSetMetadata|null);
+
+                /** PartialResultSet values. */
+                public values: google.protobuf.IValue[];
+
+                /** PartialResultSet chunkedValue. */
+                public chunkedValue: boolean;
+
+                /** PartialResultSet resumeToken. */
+                public resumeToken: (Uint8Array|string);
+
+                /** PartialResultSet stats. */
+                public stats?: (google.spanner.v1.IResultSetStats|null);
+
+                /** PartialResultSet precommitToken. */
+                public precommitToken?: (google.spanner.v1.IMultiplexedSessionPrecommitToken|null);
+
+                /**
+                 * Creates a new PartialResultSet instance using the specified properties.
+                 * @param [properties] Properties to set
+                 * @returns PartialResultSet instance
+                 */
+                public static create(properties?: google.spanner.v1.IPartialResultSet): google.spanner.v1.PartialResultSet;
+
+                /**
+                 * Encodes the specified PartialResultSet message. Does not implicitly {@link google.spanner.v1.PartialResultSet.verify|verify} messages.
+                 * @param message PartialResultSet message or plain object to encode
+                 * @param [writer] Writer to encode to
+                 * @returns Writer
+                 */
+                public static encode(message: google.spanner.v1.IPartialResultSet, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                /**
+                 * Encodes the specified PartialResultSet message, length delimited. Does not implicitly {@link google.spanner.v1.PartialResultSet.verify|verify} messages.
+                 * @param message PartialResultSet message or plain object to encode
+                 * @param [writer] Writer to encode to
+                 * @returns Writer
+                 */
+                public static encodeDelimited(message: google.spanner.v1.IPartialResultSet, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                /**
+                 * Decodes a PartialResultSet message from the specified reader or buffer.
+                 * @param reader Reader or buffer to decode from
+                 * @param [length] Message length if known beforehand
+                 * @returns PartialResultSet
+                 * @throws {Error} If the payload is not a reader or valid buffer
+                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                 */
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.PartialResultSet;
+
+                /**
+                 * Decodes a PartialResultSet message from the specified reader or buffer, length delimited.
+                 * @param reader Reader or buffer to decode from
+                 * @returns PartialResultSet
+                 * @throws {Error} If the payload is not a reader or valid buffer
+                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                 */
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.PartialResultSet;
+
+                /**
+                 * Verifies a PartialResultSet message.
+                 * @param message Plain object to verify
+                 * @returns `null` if valid, otherwise the reason why it is not
+                 */
+                public static verify(message: { [k: string]: any }): (string|null);
+
+                /**
+                 * Creates a PartialResultSet message from a plain object. Also converts values to their respective internal types.
+                 * @param object Plain object
+                 * @returns PartialResultSet
+                 */
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.PartialResultSet;
+
+                /**
+                 * Creates a plain object from a PartialResultSet message. Also converts values to other types if specified.
+                 * @param message PartialResultSet
+                 * @param [options] Conversion options
+                 * @returns Plain object
+                 */
+                public static toObject(message: google.spanner.v1.PartialResultSet, options?: $protobuf.IConversionOptions): { [k: string]: any };
+
+                /**
+                 * Converts this PartialResultSet to JSON.
+                 * @returns JSON object
+                 */
+                public toJSON(): { [k: string]: any };
+
+                /**
+                 * Gets the default type url for PartialResultSet
+                 * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                 * @returns The default type url
+                 */
+                public static getTypeUrl(typeUrlPrefix?: string): string;
+            }
+
+            /** Properties of a ResultSetMetadata. */
+            interface IResultSetMetadata {
+
+                /** ResultSetMetadata rowType */
+                rowType?: (google.spanner.v1.IStructType|null);
+
+                /** ResultSetMetadata transaction */
+                transaction?: (google.spanner.v1.ITransaction|null);
+
+                /** ResultSetMetadata undeclaredParameters */
+                undeclaredParameters?: (google.spanner.v1.IStructType|null);
+            }
+
+            /** Represents a ResultSetMetadata. */
+            class ResultSetMetadata implements IResultSetMetadata {
+
+                /**
+                 * Constructs a new ResultSetMetadata.
+                 * @param [properties] Properties to set
+                 */
+                constructor(properties?: google.spanner.v1.IResultSetMetadata);
+
+                /** ResultSetMetadata rowType. */
+                public rowType?: (google.spanner.v1.IStructType|null);
+
+                /** ResultSetMetadata transaction. */
+                public transaction?: (google.spanner.v1.ITransaction|null);
+
+                /** ResultSetMetadata undeclaredParameters. */
+                public undeclaredParameters?: (google.spanner.v1.IStructType|null);
+
+                /**
+                 * Creates a new ResultSetMetadata instance using the specified properties.
+                 * @param [properties] Properties to set
+                 * @returns ResultSetMetadata instance
+                 */
+                public static create(properties?: google.spanner.v1.IResultSetMetadata): google.spanner.v1.ResultSetMetadata;
+
+                /**
+                 * Encodes the specified ResultSetMetadata message. Does not implicitly {@link google.spanner.v1.ResultSetMetadata.verify|verify} messages.
+                 * @param message ResultSetMetadata message or plain object to encode
+                 * @param [writer] Writer to encode to
+                 * @returns Writer
+                 */
+                public static encode(message: google.spanner.v1.IResultSetMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                /**
+                 * Encodes the specified ResultSetMetadata message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSetMetadata.verify|verify} messages.
+                 * @param message ResultSetMetadata message or plain object to encode
+                 * @param [writer] Writer to encode to
+                 * @returns Writer
+                 */
+                public static encodeDelimited(message: google.spanner.v1.IResultSetMetadata, writer?: $protobuf.Writer): $protobuf.Writer;
+
+                /**
+                 * Decodes a ResultSetMetadata message from the specified reader or buffer.
+                 * @param reader Reader or buffer to decode from
+                 * @param [length] Message length if known beforehand
+                 * @returns ResultSetMetadata
+                 * @throws {Error} If the payload is not a reader or valid buffer
+                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                 */
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.ResultSetMetadata;
+
+                /**
+                 * Decodes a ResultSetMetadata message from the specified reader or buffer, length delimited.
+                 * @param reader Reader or buffer to decode from
+                 * @returns ResultSetMetadata
+                 * @throws {Error} If the payload is not a reader or valid buffer
+                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                 */
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.ResultSetMetadata;
 
-                    /**
-                     * Encodes the specified ShortRepresentation message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.ShortRepresentation.verify|verify} messages.
-                     * @param message ShortRepresentation message or plain object to encode
-                     * @param [writer] Writer to encode to
-                     * @returns Writer
-                     */
-                    public static encodeDelimited(message: google.spanner.v1.PlanNode.IShortRepresentation, writer?: $protobuf.Writer): $protobuf.Writer;
+                /**
+                 * Verifies a ResultSetMetadata message.
+                 * @param message Plain object to verify
+                 * @returns `null` if valid, otherwise the reason why it is not
+                 */
+                public static verify(message: { [k: string]: any }): (string|null);
 
-                    /**
-                     * Decodes a ShortRepresentation message from the specified reader or buffer.
-                     * @param reader Reader or buffer to decode from
-                     * @param [length] Message length if known beforehand
-                     * @returns ShortRepresentation
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.PlanNode.ShortRepresentation;
+                /**
+                 * Creates a ResultSetMetadata message from a plain object. Also converts values to their respective internal types.
+                 * @param object Plain object
+                 * @returns ResultSetMetadata
+                 */
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.ResultSetMetadata;
 
-                    /**
-                     * Decodes a ShortRepresentation message from the specified reader or buffer, length delimited.
-                     * @param reader Reader or buffer to decode from
-                     * @returns ShortRepresentation
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.PlanNode.ShortRepresentation;
+                /**
+                 * Creates a plain object from a ResultSetMetadata message. Also converts values to other types if specified.
+                 * @param message ResultSetMetadata
+                 * @param [options] Conversion options
+                 * @returns Plain object
+                 */
+                public static toObject(message: google.spanner.v1.ResultSetMetadata, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
-                    /**
-                     * Verifies a ShortRepresentation message.
-                     * @param message Plain object to verify
-                     * @returns `null` if valid, otherwise the reason why it is not
-                     */
-                    public static verify(message: { [k: string]: any }): (string|null);
+                /**
+                 * Converts this ResultSetMetadata to JSON.
+                 * @returns JSON object
+                 */
+                public toJSON(): { [k: string]: any };
 
-                    /**
-                     * Creates a ShortRepresentation message from a plain object. Also converts values to their respective internal types.
-                     * @param object Plain object
-                     * @returns ShortRepresentation
-                     */
-                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.PlanNode.ShortRepresentation;
+                /**
+                 * Gets the default type url for ResultSetMetadata
+                 * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                 * @returns The default type url
+                 */
+                public static getTypeUrl(typeUrlPrefix?: string): string;
+            }
 
-                    /**
-                     * Creates a plain object from a ShortRepresentation message. Also converts values to other types if specified.
-                     * @param message ShortRepresentation
-                     * @param [options] Conversion options
-                     * @returns Plain object
-                     */
-                    public static toObject(message: google.spanner.v1.PlanNode.ShortRepresentation, options?: $protobuf.IConversionOptions): { [k: string]: any };
+            /** Properties of a ResultSetStats. */
+            interface IResultSetStats {
 
-                    /**
-                     * Converts this ShortRepresentation to JSON.
-                     * @returns JSON object
-                     */
-                    public toJSON(): { [k: string]: any };
+                /** ResultSetStats queryPlan */
+                queryPlan?: (google.spanner.v1.IQueryPlan|null);
 
-                    /**
-                     * Gets the default type url for ShortRepresentation
-                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                     * @returns The default type url
-                     */
-                    public static getTypeUrl(typeUrlPrefix?: string): string;
-                }
-            }
+                /** ResultSetStats queryStats */
+                queryStats?: (google.protobuf.IStruct|null);
 
-            /** Properties of a QueryPlan. */
-            interface IQueryPlan {
+                /** ResultSetStats rowCountExact */
+                rowCountExact?: (number|Long|string|null);
 
-                /** QueryPlan planNodes */
-                planNodes?: (google.spanner.v1.IPlanNode[]|null);
+                /** ResultSetStats rowCountLowerBound */
+                rowCountLowerBound?: (number|Long|string|null);
             }
 
-            /** Represents a QueryPlan. */
-            class QueryPlan implements IQueryPlan {
+            /** Represents a ResultSetStats. */
+            class ResultSetStats implements IResultSetStats {
 
                 /**
-                 * Constructs a new QueryPlan.
+                 * Constructs a new ResultSetStats.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.IQueryPlan);
+                constructor(properties?: google.spanner.v1.IResultSetStats);
 
-                /** QueryPlan planNodes. */
-                public planNodes: google.spanner.v1.IPlanNode[];
+                /** ResultSetStats queryPlan. */
+                public queryPlan?: (google.spanner.v1.IQueryPlan|null);
+
+                /** ResultSetStats queryStats. */
+                public queryStats?: (google.protobuf.IStruct|null);
+
+                /** ResultSetStats rowCountExact. */
+                public rowCountExact?: (number|Long|string|null);
+
+                /** ResultSetStats rowCountLowerBound. */
+                public rowCountLowerBound?: (number|Long|string|null);
+
+                /** ResultSetStats rowCount. */
+                public rowCount?: ("rowCountExact"|"rowCountLowerBound");
 
                 /**
-                 * Creates a new QueryPlan instance using the specified properties.
+                 * Creates a new ResultSetStats instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns QueryPlan instance
+                 * @returns ResultSetStats instance
                  */
-                public static create(properties?: google.spanner.v1.IQueryPlan): google.spanner.v1.QueryPlan;
+                public static create(properties?: google.spanner.v1.IResultSetStats): google.spanner.v1.ResultSetStats;
 
                 /**
-                 * Encodes the specified QueryPlan message. Does not implicitly {@link google.spanner.v1.QueryPlan.verify|verify} messages.
-                 * @param message QueryPlan message or plain object to encode
+                 * Encodes the specified ResultSetStats message. Does not implicitly {@link google.spanner.v1.ResultSetStats.verify|verify} messages.
+                 * @param message ResultSetStats message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.IQueryPlan, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.IResultSetStats, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified QueryPlan message, length delimited. Does not implicitly {@link google.spanner.v1.QueryPlan.verify|verify} messages.
-                 * @param message QueryPlan message or plain object to encode
+                 * Encodes the specified ResultSetStats message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSetStats.verify|verify} messages.
+                 * @param message ResultSetStats message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.IQueryPlan, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.IResultSetStats, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a QueryPlan message from the specified reader or buffer.
+                 * Decodes a ResultSetStats message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns QueryPlan
+                 * @returns ResultSetStats
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.QueryPlan;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.ResultSetStats;
 
                 /**
-                 * Decodes a QueryPlan message from the specified reader or buffer, length delimited.
+                 * Decodes a ResultSetStats message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns QueryPlan
+                 * @returns ResultSetStats
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.QueryPlan;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.ResultSetStats;
 
                 /**
-                 * Verifies a QueryPlan message.
+                 * Verifies a ResultSetStats message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a QueryPlan message from a plain object. Also converts values to their respective internal types.
+                 * Creates a ResultSetStats message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns QueryPlan
+                 * @returns ResultSetStats
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.QueryPlan;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.ResultSetStats;
 
                 /**
-                 * Creates a plain object from a QueryPlan message. Also converts values to other types if specified.
-                 * @param message QueryPlan
+                 * Creates a plain object from a ResultSetStats message. Also converts values to other types if specified.
+                 * @param message ResultSetStats
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.QueryPlan, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.ResultSetStats, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this QueryPlan to JSON.
+                 * Converts this ResultSetStats to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for QueryPlan
+                 * Gets the default type url for ResultSetStats
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
                 public static getTypeUrl(typeUrlPrefix?: string): string;
             }
 
-            /** Properties of a TransactionOptions. */
-            interface ITransactionOptions {
+            /** Properties of a PlanNode. */
+            interface IPlanNode {
 
-                /** TransactionOptions readWrite */
-                readWrite?: (google.spanner.v1.TransactionOptions.IReadWrite|null);
+                /** PlanNode index */
+                index?: (number|null);
 
-                /** TransactionOptions partitionedDml */
-                partitionedDml?: (google.spanner.v1.TransactionOptions.IPartitionedDml|null);
+                /** PlanNode kind */
+                kind?: (google.spanner.v1.PlanNode.Kind|keyof typeof google.spanner.v1.PlanNode.Kind|null);
 
-                /** TransactionOptions readOnly */
-                readOnly?: (google.spanner.v1.TransactionOptions.IReadOnly|null);
+                /** PlanNode displayName */
+                displayName?: (string|null);
 
-                /** TransactionOptions excludeTxnFromChangeStreams */
-                excludeTxnFromChangeStreams?: (boolean|null);
+                /** PlanNode childLinks */
+                childLinks?: (google.spanner.v1.PlanNode.IChildLink[]|null);
+
+                /** PlanNode shortRepresentation */
+                shortRepresentation?: (google.spanner.v1.PlanNode.IShortRepresentation|null);
+
+                /** PlanNode metadata */
+                metadata?: (google.protobuf.IStruct|null);
+
+                /** PlanNode executionStats */
+                executionStats?: (google.protobuf.IStruct|null);
             }
 
-            /** Represents a TransactionOptions. */
-            class TransactionOptions implements ITransactionOptions {
+            /** Represents a PlanNode. */
+            class PlanNode implements IPlanNode {
 
                 /**
-                 * Constructs a new TransactionOptions.
+                 * Constructs a new PlanNode.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.ITransactionOptions);
+                constructor(properties?: google.spanner.v1.IPlanNode);
 
-                /** TransactionOptions readWrite. */
-                public readWrite?: (google.spanner.v1.TransactionOptions.IReadWrite|null);
+                /** PlanNode index. */
+                public index: number;
 
-                /** TransactionOptions partitionedDml. */
-                public partitionedDml?: (google.spanner.v1.TransactionOptions.IPartitionedDml|null);
+                /** PlanNode kind. */
+                public kind: (google.spanner.v1.PlanNode.Kind|keyof typeof google.spanner.v1.PlanNode.Kind);
 
-                /** TransactionOptions readOnly. */
-                public readOnly?: (google.spanner.v1.TransactionOptions.IReadOnly|null);
+                /** PlanNode displayName. */
+                public displayName: string;
 
-                /** TransactionOptions excludeTxnFromChangeStreams. */
-                public excludeTxnFromChangeStreams: boolean;
+                /** PlanNode childLinks. */
+                public childLinks: google.spanner.v1.PlanNode.IChildLink[];
 
-                /** TransactionOptions mode. */
-                public mode?: ("readWrite"|"partitionedDml"|"readOnly");
+                /** PlanNode shortRepresentation. */
+                public shortRepresentation?: (google.spanner.v1.PlanNode.IShortRepresentation|null);
+
+                /** PlanNode metadata. */
+                public metadata?: (google.protobuf.IStruct|null);
+
+                /** PlanNode executionStats. */
+                public executionStats?: (google.protobuf.IStruct|null);
 
                 /**
-                 * Creates a new TransactionOptions instance using the specified properties.
+                 * Creates a new PlanNode instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns TransactionOptions instance
+                 * @returns PlanNode instance
                  */
-                public static create(properties?: google.spanner.v1.ITransactionOptions): google.spanner.v1.TransactionOptions;
+                public static create(properties?: google.spanner.v1.IPlanNode): google.spanner.v1.PlanNode;
 
                 /**
-                 * Encodes the specified TransactionOptions message. Does not implicitly {@link google.spanner.v1.TransactionOptions.verify|verify} messages.
-                 * @param message TransactionOptions message or plain object to encode
+                 * Encodes the specified PlanNode message. Does not implicitly {@link google.spanner.v1.PlanNode.verify|verify} messages.
+                 * @param message PlanNode message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.ITransactionOptions, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.IPlanNode, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified TransactionOptions message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.verify|verify} messages.
-                 * @param message TransactionOptions message or plain object to encode
+                 * Encodes the specified PlanNode message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.verify|verify} messages.
+                 * @param message PlanNode message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.ITransactionOptions, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.IPlanNode, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a TransactionOptions message from the specified reader or buffer.
+                 * Decodes a PlanNode message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns TransactionOptions
+                 * @returns PlanNode
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionOptions;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.PlanNode;
 
                 /**
-                 * Decodes a TransactionOptions message from the specified reader or buffer, length delimited.
+                 * Decodes a PlanNode message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns TransactionOptions
+                 * @returns PlanNode
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionOptions;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.PlanNode;
 
                 /**
-                 * Verifies a TransactionOptions message.
+                 * Verifies a PlanNode message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a TransactionOptions message from a plain object. Also converts values to their respective internal types.
+                 * Creates a PlanNode message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns TransactionOptions
+                 * @returns PlanNode
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionOptions;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.PlanNode;
 
                 /**
-                 * Creates a plain object from a TransactionOptions message. Also converts values to other types if specified.
-                 * @param message TransactionOptions
+                 * Creates a plain object from a PlanNode message. Also converts values to other types if specified.
+                 * @param message PlanNode
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.TransactionOptions, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.PlanNode, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this TransactionOptions to JSON.
+                 * Converts this PlanNode to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for TransactionOptions
+                 * Gets the default type url for PlanNode
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
                 public static getTypeUrl(typeUrlPrefix?: string): string;
             }
 
-            namespace TransactionOptions {
-
-                /** Properties of a ReadWrite. */
-                interface IReadWrite {
+            namespace PlanNode {
 
-                    /** ReadWrite readLockMode */
-                    readLockMode?: (google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode|keyof typeof google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode|null);
+                /** Kind enum. */
+                enum Kind {
+                    KIND_UNSPECIFIED = 0,
+                    RELATIONAL = 1,
+                    SCALAR = 2
                 }
 
-                /** Represents a ReadWrite. */
-                class ReadWrite implements IReadWrite {
-
-                    /**
-                     * Constructs a new ReadWrite.
-                     * @param [properties] Properties to set
-                     */
-                    constructor(properties?: google.spanner.v1.TransactionOptions.IReadWrite);
-
-                    /** ReadWrite readLockMode. */
-                    public readLockMode: (google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode|keyof typeof google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode);
-
-                    /**
-                     * Creates a new ReadWrite instance using the specified properties.
-                     * @param [properties] Properties to set
-                     * @returns ReadWrite instance
-                     */
-                    public static create(properties?: google.spanner.v1.TransactionOptions.IReadWrite): google.spanner.v1.TransactionOptions.ReadWrite;
-
-                    /**
-                     * Encodes the specified ReadWrite message. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadWrite.verify|verify} messages.
-                     * @param message ReadWrite message or plain object to encode
-                     * @param [writer] Writer to encode to
-                     * @returns Writer
-                     */
-                    public static encode(message: google.spanner.v1.TransactionOptions.IReadWrite, writer?: $protobuf.Writer): $protobuf.Writer;
-
-                    /**
-                     * Encodes the specified ReadWrite message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadWrite.verify|verify} messages.
-                     * @param message ReadWrite message or plain object to encode
-                     * @param [writer] Writer to encode to
-                     * @returns Writer
-                     */
-                    public static encodeDelimited(message: google.spanner.v1.TransactionOptions.IReadWrite, writer?: $protobuf.Writer): $protobuf.Writer;
-
-                    /**
-                     * Decodes a ReadWrite message from the specified reader or buffer.
-                     * @param reader Reader or buffer to decode from
-                     * @param [length] Message length if known beforehand
-                     * @returns ReadWrite
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionOptions.ReadWrite;
-
-                    /**
-                     * Decodes a ReadWrite message from the specified reader or buffer, length delimited.
-                     * @param reader Reader or buffer to decode from
-                     * @returns ReadWrite
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionOptions.ReadWrite;
+                /** Properties of a ChildLink. */
+                interface IChildLink {
 
-                    /**
-                     * Verifies a ReadWrite message.
-                     * @param message Plain object to verify
-                     * @returns `null` if valid, otherwise the reason why it is not
-                     */
-                    public static verify(message: { [k: string]: any }): (string|null);
+                    /** ChildLink childIndex */
+                    childIndex?: (number|null);
 
-                    /**
-                     * Creates a ReadWrite message from a plain object. Also converts values to their respective internal types.
-                     * @param object Plain object
-                     * @returns ReadWrite
-                     */
-                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionOptions.ReadWrite;
+                    /** ChildLink type */
+                    type?: (string|null);
 
-                    /**
-                     * Creates a plain object from a ReadWrite message. Also converts values to other types if specified.
-                     * @param message ReadWrite
-                     * @param [options] Conversion options
-                     * @returns Plain object
-                     */
-                    public static toObject(message: google.spanner.v1.TransactionOptions.ReadWrite, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    /** ChildLink variable */
+                    variable?: (string|null);
+                }
 
-                    /**
-                     * Converts this ReadWrite to JSON.
-                     * @returns JSON object
-                     */
-                    public toJSON(): { [k: string]: any };
+                /** Represents a ChildLink. */
+                class ChildLink implements IChildLink {
 
                     /**
-                     * Gets the default type url for ReadWrite
-                     * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                     * @returns The default type url
+                     * Constructs a new ChildLink.
+                     * @param [properties] Properties to set
                      */
-                    public static getTypeUrl(typeUrlPrefix?: string): string;
-                }
-
-                namespace ReadWrite {
-
-                    /** ReadLockMode enum. */
-                    enum ReadLockMode {
-                        READ_LOCK_MODE_UNSPECIFIED = 0,
-                        PESSIMISTIC = 1,
-                        OPTIMISTIC = 2
-                    }
-                }
+                    constructor(properties?: google.spanner.v1.PlanNode.IChildLink);
 
-                /** Properties of a PartitionedDml. */
-                interface IPartitionedDml {
-                }
+                    /** ChildLink childIndex. */
+                    public childIndex: number;
 
-                /** Represents a PartitionedDml. */
-                class PartitionedDml implements IPartitionedDml {
+                    /** ChildLink type. */
+                    public type: string;
 
-                    /**
-                     * Constructs a new PartitionedDml.
-                     * @param [properties] Properties to set
-                     */
-                    constructor(properties?: google.spanner.v1.TransactionOptions.IPartitionedDml);
+                    /** ChildLink variable. */
+                    public variable: string;
 
                     /**
-                     * Creates a new PartitionedDml instance using the specified properties.
+                     * Creates a new ChildLink instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns PartitionedDml instance
+                     * @returns ChildLink instance
                      */
-                    public static create(properties?: google.spanner.v1.TransactionOptions.IPartitionedDml): google.spanner.v1.TransactionOptions.PartitionedDml;
+                    public static create(properties?: google.spanner.v1.PlanNode.IChildLink): google.spanner.v1.PlanNode.ChildLink;
 
                     /**
-                     * Encodes the specified PartitionedDml message. Does not implicitly {@link google.spanner.v1.TransactionOptions.PartitionedDml.verify|verify} messages.
-                     * @param message PartitionedDml message or plain object to encode
+                     * Encodes the specified ChildLink message. Does not implicitly {@link google.spanner.v1.PlanNode.ChildLink.verify|verify} messages.
+                     * @param message ChildLink message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.spanner.v1.TransactionOptions.IPartitionedDml, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.spanner.v1.PlanNode.IChildLink, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified PartitionedDml message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.PartitionedDml.verify|verify} messages.
-                     * @param message PartitionedDml message or plain object to encode
+                     * Encodes the specified ChildLink message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.ChildLink.verify|verify} messages.
+                     * @param message ChildLink message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.spanner.v1.TransactionOptions.IPartitionedDml, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.spanner.v1.PlanNode.IChildLink, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a PartitionedDml message from the specified reader or buffer.
+                     * Decodes a ChildLink message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns PartitionedDml
+                     * @returns ChildLink
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionOptions.PartitionedDml;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.PlanNode.ChildLink;
 
                     /**
-                     * Decodes a PartitionedDml message from the specified reader or buffer, length delimited.
+                     * Decodes a ChildLink message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns PartitionedDml
+                     * @returns ChildLink
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionOptions.PartitionedDml;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.PlanNode.ChildLink;
 
                     /**
-                     * Verifies a PartitionedDml message.
+                     * Verifies a ChildLink message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a PartitionedDml message from a plain object. Also converts values to their respective internal types.
+                     * Creates a ChildLink message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns PartitionedDml
+                     * @returns ChildLink
                      */
-                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionOptions.PartitionedDml;
+                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.PlanNode.ChildLink;
 
                     /**
-                     * Creates a plain object from a PartitionedDml message. Also converts values to other types if specified.
-                     * @param message PartitionedDml
+                     * Creates a plain object from a ChildLink message. Also converts values to other types if specified.
+                     * @param message ChildLink
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.spanner.v1.TransactionOptions.PartitionedDml, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.spanner.v1.PlanNode.ChildLink, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this PartitionedDml to JSON.
+                     * Converts this ChildLink to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for PartitionedDml
+                     * Gets the default type url for ChildLink
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
                     public static getTypeUrl(typeUrlPrefix?: string): string;
                 }
 
-                /** Properties of a ReadOnly. */
-                interface IReadOnly {
-
-                    /** ReadOnly strong */
-                    strong?: (boolean|null);
-
-                    /** ReadOnly minReadTimestamp */
-                    minReadTimestamp?: (google.protobuf.ITimestamp|null);
-
-                    /** ReadOnly maxStaleness */
-                    maxStaleness?: (google.protobuf.IDuration|null);
-
-                    /** ReadOnly readTimestamp */
-                    readTimestamp?: (google.protobuf.ITimestamp|null);
-
-                    /** ReadOnly exactStaleness */
-                    exactStaleness?: (google.protobuf.IDuration|null);
-
-                    /** ReadOnly returnReadTimestamp */
-                    returnReadTimestamp?: (boolean|null);
-                }
-
-                /** Represents a ReadOnly. */
-                class ReadOnly implements IReadOnly {
-
-                    /**
-                     * Constructs a new ReadOnly.
-                     * @param [properties] Properties to set
-                     */
-                    constructor(properties?: google.spanner.v1.TransactionOptions.IReadOnly);
-
-                    /** ReadOnly strong. */
-                    public strong?: (boolean|null);
+                /** Properties of a ShortRepresentation. */
+                interface IShortRepresentation {
 
-                    /** ReadOnly minReadTimestamp. */
-                    public minReadTimestamp?: (google.protobuf.ITimestamp|null);
+                    /** ShortRepresentation description */
+                    description?: (string|null);
 
-                    /** ReadOnly maxStaleness. */
-                    public maxStaleness?: (google.protobuf.IDuration|null);
+                    /** ShortRepresentation subqueries */
+                    subqueries?: ({ [k: string]: number }|null);
+                }
 
-                    /** ReadOnly readTimestamp. */
-                    public readTimestamp?: (google.protobuf.ITimestamp|null);
+                /** Represents a ShortRepresentation. */
+                class ShortRepresentation implements IShortRepresentation {
 
-                    /** ReadOnly exactStaleness. */
-                    public exactStaleness?: (google.protobuf.IDuration|null);
+                    /**
+                     * Constructs a new ShortRepresentation.
+                     * @param [properties] Properties to set
+                     */
+                    constructor(properties?: google.spanner.v1.PlanNode.IShortRepresentation);
 
-                    /** ReadOnly returnReadTimestamp. */
-                    public returnReadTimestamp: boolean;
+                    /** ShortRepresentation description. */
+                    public description: string;
 
-                    /** ReadOnly timestampBound. */
-                    public timestampBound?: ("strong"|"minReadTimestamp"|"maxStaleness"|"readTimestamp"|"exactStaleness");
+                    /** ShortRepresentation subqueries. */
+                    public subqueries: { [k: string]: number };
 
                     /**
-                     * Creates a new ReadOnly instance using the specified properties.
+                     * Creates a new ShortRepresentation instance using the specified properties.
                      * @param [properties] Properties to set
-                     * @returns ReadOnly instance
+                     * @returns ShortRepresentation instance
                      */
-                    public static create(properties?: google.spanner.v1.TransactionOptions.IReadOnly): google.spanner.v1.TransactionOptions.ReadOnly;
+                    public static create(properties?: google.spanner.v1.PlanNode.IShortRepresentation): google.spanner.v1.PlanNode.ShortRepresentation;
 
                     /**
-                     * Encodes the specified ReadOnly message. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadOnly.verify|verify} messages.
-                     * @param message ReadOnly message or plain object to encode
+                     * Encodes the specified ShortRepresentation message. Does not implicitly {@link google.spanner.v1.PlanNode.ShortRepresentation.verify|verify} messages.
+                     * @param message ShortRepresentation message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encode(message: google.spanner.v1.TransactionOptions.IReadOnly, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encode(message: google.spanner.v1.PlanNode.IShortRepresentation, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Encodes the specified ReadOnly message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadOnly.verify|verify} messages.
-                     * @param message ReadOnly message or plain object to encode
+                     * Encodes the specified ShortRepresentation message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.ShortRepresentation.verify|verify} messages.
+                     * @param message ShortRepresentation message or plain object to encode
                      * @param [writer] Writer to encode to
                      * @returns Writer
                      */
-                    public static encodeDelimited(message: google.spanner.v1.TransactionOptions.IReadOnly, writer?: $protobuf.Writer): $protobuf.Writer;
+                    public static encodeDelimited(message: google.spanner.v1.PlanNode.IShortRepresentation, writer?: $protobuf.Writer): $protobuf.Writer;
 
                     /**
-                     * Decodes a ReadOnly message from the specified reader or buffer.
+                     * Decodes a ShortRepresentation message from the specified reader or buffer.
                      * @param reader Reader or buffer to decode from
                      * @param [length] Message length if known beforehand
-                     * @returns ReadOnly
+                     * @returns ShortRepresentation
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionOptions.ReadOnly;
+                    public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.PlanNode.ShortRepresentation;
 
                     /**
-                     * Decodes a ReadOnly message from the specified reader or buffer, length delimited.
+                     * Decodes a ShortRepresentation message from the specified reader or buffer, length delimited.
                      * @param reader Reader or buffer to decode from
-                     * @returns ReadOnly
+                     * @returns ShortRepresentation
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionOptions.ReadOnly;
+                    public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.PlanNode.ShortRepresentation;
 
                     /**
-                     * Verifies a ReadOnly message.
+                     * Verifies a ShortRepresentation message.
                      * @param message Plain object to verify
                      * @returns `null` if valid, otherwise the reason why it is not
                      */
                     public static verify(message: { [k: string]: any }): (string|null);
 
                     /**
-                     * Creates a ReadOnly message from a plain object. Also converts values to their respective internal types.
+                     * Creates a ShortRepresentation message from a plain object. Also converts values to their respective internal types.
                      * @param object Plain object
-                     * @returns ReadOnly
+                     * @returns ShortRepresentation
                      */
-                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionOptions.ReadOnly;
+                    public static fromObject(object: { [k: string]: any }): google.spanner.v1.PlanNode.ShortRepresentation;
 
                     /**
-                     * Creates a plain object from a ReadOnly message. Also converts values to other types if specified.
-                     * @param message ReadOnly
+                     * Creates a plain object from a ShortRepresentation message. Also converts values to other types if specified.
+                     * @param message ShortRepresentation
                      * @param [options] Conversion options
                      * @returns Plain object
                      */
-                    public static toObject(message: google.spanner.v1.TransactionOptions.ReadOnly, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                    public static toObject(message: google.spanner.v1.PlanNode.ShortRepresentation, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                     /**
-                     * Converts this ReadOnly to JSON.
+                     * Converts this ShortRepresentation to JSON.
                      * @returns JSON object
                      */
                     public toJSON(): { [k: string]: any };
 
                     /**
-                     * Gets the default type url for ReadOnly
+                     * Gets the default type url for ShortRepresentation
                      * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns The default type url
                      */
@@ -33206,215 +33923,97 @@ export namespace google {
                 }
             }
 
-            /** Properties of a Transaction. */
-            interface ITransaction {
-
-                /** Transaction id */
-                id?: (Uint8Array|string|null);
-
-                /** Transaction readTimestamp */
-                readTimestamp?: (google.protobuf.ITimestamp|null);
-            }
-
-            /** Represents a Transaction. */
-            class Transaction implements ITransaction {
-
-                /**
-                 * Constructs a new Transaction.
-                 * @param [properties] Properties to set
-                 */
-                constructor(properties?: google.spanner.v1.ITransaction);
-
-                /** Transaction id. */
-                public id: (Uint8Array|string);
-
-                /** Transaction readTimestamp. */
-                public readTimestamp?: (google.protobuf.ITimestamp|null);
-
-                /**
-                 * Creates a new Transaction instance using the specified properties.
-                 * @param [properties] Properties to set
-                 * @returns Transaction instance
-                 */
-                public static create(properties?: google.spanner.v1.ITransaction): google.spanner.v1.Transaction;
-
-                /**
-                 * Encodes the specified Transaction message. Does not implicitly {@link google.spanner.v1.Transaction.verify|verify} messages.
-                 * @param message Transaction message or plain object to encode
-                 * @param [writer] Writer to encode to
-                 * @returns Writer
-                 */
-                public static encode(message: google.spanner.v1.ITransaction, writer?: $protobuf.Writer): $protobuf.Writer;
-
-                /**
-                 * Encodes the specified Transaction message, length delimited. Does not implicitly {@link google.spanner.v1.Transaction.verify|verify} messages.
-                 * @param message Transaction message or plain object to encode
-                 * @param [writer] Writer to encode to
-                 * @returns Writer
-                 */
-                public static encodeDelimited(message: google.spanner.v1.ITransaction, writer?: $protobuf.Writer): $protobuf.Writer;
-
-                /**
-                 * Decodes a Transaction message from the specified reader or buffer.
-                 * @param reader Reader or buffer to decode from
-                 * @param [length] Message length if known beforehand
-                 * @returns Transaction
-                 * @throws {Error} If the payload is not a reader or valid buffer
-                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                 */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.Transaction;
-
-                /**
-                 * Decodes a Transaction message from the specified reader or buffer, length delimited.
-                 * @param reader Reader or buffer to decode from
-                 * @returns Transaction
-                 * @throws {Error} If the payload is not a reader or valid buffer
-                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                 */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.Transaction;
-
-                /**
-                 * Verifies a Transaction message.
-                 * @param message Plain object to verify
-                 * @returns `null` if valid, otherwise the reason why it is not
-                 */
-                public static verify(message: { [k: string]: any }): (string|null);
-
-                /**
-                 * Creates a Transaction message from a plain object. Also converts values to their respective internal types.
-                 * @param object Plain object
-                 * @returns Transaction
-                 */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.Transaction;
-
-                /**
-                 * Creates a plain object from a Transaction message. Also converts values to other types if specified.
-                 * @param message Transaction
-                 * @param [options] Conversion options
-                 * @returns Plain object
-                 */
-                public static toObject(message: google.spanner.v1.Transaction, options?: $protobuf.IConversionOptions): { [k: string]: any };
-
-                /**
-                 * Converts this Transaction to JSON.
-                 * @returns JSON object
-                 */
-                public toJSON(): { [k: string]: any };
-
-                /**
-                 * Gets the default type url for Transaction
-                 * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                 * @returns The default type url
-                 */
-                public static getTypeUrl(typeUrlPrefix?: string): string;
-            }
-
-            /** Properties of a TransactionSelector. */
-            interface ITransactionSelector {
-
-                /** TransactionSelector singleUse */
-                singleUse?: (google.spanner.v1.ITransactionOptions|null);
-
-                /** TransactionSelector id */
-                id?: (Uint8Array|string|null);
+            /** Properties of a QueryPlan. */
+            interface IQueryPlan {
 
-                /** TransactionSelector begin */
-                begin?: (google.spanner.v1.ITransactionOptions|null);
+                /** QueryPlan planNodes */
+                planNodes?: (google.spanner.v1.IPlanNode[]|null);
             }
 
-            /** Represents a TransactionSelector. */
-            class TransactionSelector implements ITransactionSelector {
+            /** Represents a QueryPlan. */
+            class QueryPlan implements IQueryPlan {
 
                 /**
-                 * Constructs a new TransactionSelector.
+                 * Constructs a new QueryPlan.
                  * @param [properties] Properties to set
                  */
-                constructor(properties?: google.spanner.v1.ITransactionSelector);
-
-                /** TransactionSelector singleUse. */
-                public singleUse?: (google.spanner.v1.ITransactionOptions|null);
-
-                /** TransactionSelector id. */
-                public id?: (Uint8Array|string|null);
-
-                /** TransactionSelector begin. */
-                public begin?: (google.spanner.v1.ITransactionOptions|null);
+                constructor(properties?: google.spanner.v1.IQueryPlan);
 
-                /** TransactionSelector selector. */
-                public selector?: ("singleUse"|"id"|"begin");
+                /** QueryPlan planNodes. */
+                public planNodes: google.spanner.v1.IPlanNode[];
 
                 /**
-                 * Creates a new TransactionSelector instance using the specified properties.
+                 * Creates a new QueryPlan instance using the specified properties.
                  * @param [properties] Properties to set
-                 * @returns TransactionSelector instance
+                 * @returns QueryPlan instance
                  */
-                public static create(properties?: google.spanner.v1.ITransactionSelector): google.spanner.v1.TransactionSelector;
+                public static create(properties?: google.spanner.v1.IQueryPlan): google.spanner.v1.QueryPlan;
 
                 /**
-                 * Encodes the specified TransactionSelector message. Does not implicitly {@link google.spanner.v1.TransactionSelector.verify|verify} messages.
-                 * @param message TransactionSelector message or plain object to encode
+                 * Encodes the specified QueryPlan message. Does not implicitly {@link google.spanner.v1.QueryPlan.verify|verify} messages.
+                 * @param message QueryPlan message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encode(message: google.spanner.v1.ITransactionSelector, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encode(message: google.spanner.v1.IQueryPlan, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Encodes the specified TransactionSelector message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionSelector.verify|verify} messages.
-                 * @param message TransactionSelector message or plain object to encode
+                 * Encodes the specified QueryPlan message, length delimited. Does not implicitly {@link google.spanner.v1.QueryPlan.verify|verify} messages.
+                 * @param message QueryPlan message or plain object to encode
                  * @param [writer] Writer to encode to
                  * @returns Writer
                  */
-                public static encodeDelimited(message: google.spanner.v1.ITransactionSelector, writer?: $protobuf.Writer): $protobuf.Writer;
+                public static encodeDelimited(message: google.spanner.v1.IQueryPlan, writer?: $protobuf.Writer): $protobuf.Writer;
 
                 /**
-                 * Decodes a TransactionSelector message from the specified reader or buffer.
+                 * Decodes a QueryPlan message from the specified reader or buffer.
                  * @param reader Reader or buffer to decode from
                  * @param [length] Message length if known beforehand
-                 * @returns TransactionSelector
+                 * @returns QueryPlan
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.TransactionSelector;
+                public static decode(reader: ($protobuf.Reader|Uint8Array), length?: number): google.spanner.v1.QueryPlan;
 
                 /**
-                 * Decodes a TransactionSelector message from the specified reader or buffer, length delimited.
+                 * Decodes a QueryPlan message from the specified reader or buffer, length delimited.
                  * @param reader Reader or buffer to decode from
-                 * @returns TransactionSelector
+                 * @returns QueryPlan
                  * @throws {Error} If the payload is not a reader or valid buffer
                  * @throws {$protobuf.util.ProtocolError} If required fields are missing
                  */
-                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.TransactionSelector;
+                public static decodeDelimited(reader: ($protobuf.Reader|Uint8Array)): google.spanner.v1.QueryPlan;
 
                 /**
-                 * Verifies a TransactionSelector message.
+                 * Verifies a QueryPlan message.
                  * @param message Plain object to verify
                  * @returns `null` if valid, otherwise the reason why it is not
                  */
                 public static verify(message: { [k: string]: any }): (string|null);
 
                 /**
-                 * Creates a TransactionSelector message from a plain object. Also converts values to their respective internal types.
+                 * Creates a QueryPlan message from a plain object. Also converts values to their respective internal types.
                  * @param object Plain object
-                 * @returns TransactionSelector
+                 * @returns QueryPlan
                  */
-                public static fromObject(object: { [k: string]: any }): google.spanner.v1.TransactionSelector;
+                public static fromObject(object: { [k: string]: any }): google.spanner.v1.QueryPlan;
 
                 /**
-                 * Creates a plain object from a TransactionSelector message. Also converts values to other types if specified.
-                 * @param message TransactionSelector
+                 * Creates a plain object from a QueryPlan message. Also converts values to other types if specified.
+                 * @param message QueryPlan
                  * @param [options] Conversion options
                  * @returns Plain object
                  */
-                public static toObject(message: google.spanner.v1.TransactionSelector, options?: $protobuf.IConversionOptions): { [k: string]: any };
+                public static toObject(message: google.spanner.v1.QueryPlan, options?: $protobuf.IConversionOptions): { [k: string]: any };
 
                 /**
-                 * Converts this TransactionSelector to JSON.
+                 * Converts this QueryPlan to JSON.
                  * @returns JSON object
                  */
                 public toJSON(): { [k: string]: any };
 
                 /**
-                 * Gets the default type url for TransactionSelector
+                 * Gets the default type url for QueryPlan
                  * @param [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                  * @returns The default type url
                  */
@@ -33761,7 +34360,8 @@ export namespace google {
                 NUMERIC = 10,
                 JSON = 11,
                 PROTO = 13,
-                ENUM = 14
+                ENUM = 14,
+                INTERVAL = 16
             }
 
             /** TypeAnnotationCode enum. */
diff --git a/protos/protos.js b/protos/protos.js
index 46bf7d127..3d9b1fbe7 100644
--- a/protos/protos.js
+++ b/protos/protos.js
@@ -33533,6 +33533,209 @@
                             return values;
                         })();
     
+                        v1.ReplicaSelection = (function() {
+    
+                            /**
+                             * Properties of a ReplicaSelection.
+                             * @memberof google.spanner.admin.instance.v1
+                             * @interface IReplicaSelection
+                             * @property {string|null} [location] ReplicaSelection location
+                             */
+    
+                            /**
+                             * Constructs a new ReplicaSelection.
+                             * @memberof google.spanner.admin.instance.v1
+                             * @classdesc Represents a ReplicaSelection.
+                             * @implements IReplicaSelection
+                             * @constructor
+                             * @param {google.spanner.admin.instance.v1.IReplicaSelection=} [properties] Properties to set
+                             */
+                            function ReplicaSelection(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * ReplicaSelection location.
+                             * @member {string} location
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @instance
+                             */
+                            ReplicaSelection.prototype.location = "";
+    
+                            /**
+                             * Creates a new ReplicaSelection instance using the specified properties.
+                             * @function create
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IReplicaSelection=} [properties] Properties to set
+                             * @returns {google.spanner.admin.instance.v1.ReplicaSelection} ReplicaSelection instance
+                             */
+                            ReplicaSelection.create = function create(properties) {
+                                return new ReplicaSelection(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified ReplicaSelection message. Does not implicitly {@link google.spanner.admin.instance.v1.ReplicaSelection.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IReplicaSelection} message ReplicaSelection message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            ReplicaSelection.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.location != null && Object.hasOwnProperty.call(message, "location"))
+                                    writer.uint32(/* id 1, wireType 2 =*/10).string(message.location);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified ReplicaSelection message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.ReplicaSelection.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IReplicaSelection} message ReplicaSelection message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            ReplicaSelection.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a ReplicaSelection message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.spanner.admin.instance.v1.ReplicaSelection} ReplicaSelection
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            ReplicaSelection.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.admin.instance.v1.ReplicaSelection();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.location = reader.string();
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a ReplicaSelection message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.spanner.admin.instance.v1.ReplicaSelection} ReplicaSelection
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            ReplicaSelection.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a ReplicaSelection message.
+                             * @function verify
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            ReplicaSelection.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                if (message.location != null && message.hasOwnProperty("location"))
+                                    if (!$util.isString(message.location))
+                                        return "location: string expected";
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a ReplicaSelection message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.spanner.admin.instance.v1.ReplicaSelection} ReplicaSelection
+                             */
+                            ReplicaSelection.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.spanner.admin.instance.v1.ReplicaSelection)
+                                    return object;
+                                var message = new $root.google.spanner.admin.instance.v1.ReplicaSelection();
+                                if (object.location != null)
+                                    message.location = String(object.location);
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a ReplicaSelection message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.ReplicaSelection} message ReplicaSelection
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            ReplicaSelection.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults)
+                                    object.location = "";
+                                if (message.location != null && message.hasOwnProperty("location"))
+                                    object.location = message.location;
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this ReplicaSelection to JSON.
+                             * @function toJSON
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            ReplicaSelection.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for ReplicaSelection
+                             * @function getTypeUrl
+                             * @memberof google.spanner.admin.instance.v1.ReplicaSelection
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            ReplicaSelection.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.spanner.admin.instance.v1.ReplicaSelection";
+                            };
+    
+                            return ReplicaSelection;
+                        })();
+    
                         v1.InstanceAdmin = (function() {
     
                             /**
@@ -35168,6 +35371,285 @@
                             return InstanceConfig;
                         })();
     
+                        v1.ReplicaComputeCapacity = (function() {
+    
+                            /**
+                             * Properties of a ReplicaComputeCapacity.
+                             * @memberof google.spanner.admin.instance.v1
+                             * @interface IReplicaComputeCapacity
+                             * @property {google.spanner.admin.instance.v1.IReplicaSelection|null} [replicaSelection] ReplicaComputeCapacity replicaSelection
+                             * @property {number|null} [nodeCount] ReplicaComputeCapacity nodeCount
+                             * @property {number|null} [processingUnits] ReplicaComputeCapacity processingUnits
+                             */
+    
+                            /**
+                             * Constructs a new ReplicaComputeCapacity.
+                             * @memberof google.spanner.admin.instance.v1
+                             * @classdesc Represents a ReplicaComputeCapacity.
+                             * @implements IReplicaComputeCapacity
+                             * @constructor
+                             * @param {google.spanner.admin.instance.v1.IReplicaComputeCapacity=} [properties] Properties to set
+                             */
+                            function ReplicaComputeCapacity(properties) {
+                                if (properties)
+                                    for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                        if (properties[keys[i]] != null)
+                                            this[keys[i]] = properties[keys[i]];
+                            }
+    
+                            /**
+                             * ReplicaComputeCapacity replicaSelection.
+                             * @member {google.spanner.admin.instance.v1.IReplicaSelection|null|undefined} replicaSelection
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @instance
+                             */
+                            ReplicaComputeCapacity.prototype.replicaSelection = null;
+    
+                            /**
+                             * ReplicaComputeCapacity nodeCount.
+                             * @member {number|null|undefined} nodeCount
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @instance
+                             */
+                            ReplicaComputeCapacity.prototype.nodeCount = null;
+    
+                            /**
+                             * ReplicaComputeCapacity processingUnits.
+                             * @member {number|null|undefined} processingUnits
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @instance
+                             */
+                            ReplicaComputeCapacity.prototype.processingUnits = null;
+    
+                            // OneOf field names bound to virtual getters and setters
+                            var $oneOfFields;
+    
+                            /**
+                             * ReplicaComputeCapacity computeCapacity.
+                             * @member {"nodeCount"|"processingUnits"|undefined} computeCapacity
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @instance
+                             */
+                            Object.defineProperty(ReplicaComputeCapacity.prototype, "computeCapacity", {
+                                get: $util.oneOfGetter($oneOfFields = ["nodeCount", "processingUnits"]),
+                                set: $util.oneOfSetter($oneOfFields)
+                            });
+    
+                            /**
+                             * Creates a new ReplicaComputeCapacity instance using the specified properties.
+                             * @function create
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IReplicaComputeCapacity=} [properties] Properties to set
+                             * @returns {google.spanner.admin.instance.v1.ReplicaComputeCapacity} ReplicaComputeCapacity instance
+                             */
+                            ReplicaComputeCapacity.create = function create(properties) {
+                                return new ReplicaComputeCapacity(properties);
+                            };
+    
+                            /**
+                             * Encodes the specified ReplicaComputeCapacity message. Does not implicitly {@link google.spanner.admin.instance.v1.ReplicaComputeCapacity.verify|verify} messages.
+                             * @function encode
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IReplicaComputeCapacity} message ReplicaComputeCapacity message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            ReplicaComputeCapacity.encode = function encode(message, writer) {
+                                if (!writer)
+                                    writer = $Writer.create();
+                                if (message.replicaSelection != null && Object.hasOwnProperty.call(message, "replicaSelection"))
+                                    $root.google.spanner.admin.instance.v1.ReplicaSelection.encode(message.replicaSelection, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                if (message.nodeCount != null && Object.hasOwnProperty.call(message, "nodeCount"))
+                                    writer.uint32(/* id 2, wireType 0 =*/16).int32(message.nodeCount);
+                                if (message.processingUnits != null && Object.hasOwnProperty.call(message, "processingUnits"))
+                                    writer.uint32(/* id 3, wireType 0 =*/24).int32(message.processingUnits);
+                                return writer;
+                            };
+    
+                            /**
+                             * Encodes the specified ReplicaComputeCapacity message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.ReplicaComputeCapacity.verify|verify} messages.
+                             * @function encodeDelimited
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.IReplicaComputeCapacity} message ReplicaComputeCapacity message or plain object to encode
+                             * @param {$protobuf.Writer} [writer] Writer to encode to
+                             * @returns {$protobuf.Writer} Writer
+                             */
+                            ReplicaComputeCapacity.encodeDelimited = function encodeDelimited(message, writer) {
+                                return this.encode(message, writer).ldelim();
+                            };
+    
+                            /**
+                             * Decodes a ReplicaComputeCapacity message from the specified reader or buffer.
+                             * @function decode
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @param {number} [length] Message length if known beforehand
+                             * @returns {google.spanner.admin.instance.v1.ReplicaComputeCapacity} ReplicaComputeCapacity
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            ReplicaComputeCapacity.decode = function decode(reader, length) {
+                                if (!(reader instanceof $Reader))
+                                    reader = $Reader.create(reader);
+                                var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.admin.instance.v1.ReplicaComputeCapacity();
+                                while (reader.pos < end) {
+                                    var tag = reader.uint32();
+                                    switch (tag >>> 3) {
+                                    case 1: {
+                                            message.replicaSelection = $root.google.spanner.admin.instance.v1.ReplicaSelection.decode(reader, reader.uint32());
+                                            break;
+                                        }
+                                    case 2: {
+                                            message.nodeCount = reader.int32();
+                                            break;
+                                        }
+                                    case 3: {
+                                            message.processingUnits = reader.int32();
+                                            break;
+                                        }
+                                    default:
+                                        reader.skipType(tag & 7);
+                                        break;
+                                    }
+                                }
+                                return message;
+                            };
+    
+                            /**
+                             * Decodes a ReplicaComputeCapacity message from the specified reader or buffer, length delimited.
+                             * @function decodeDelimited
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                             * @returns {google.spanner.admin.instance.v1.ReplicaComputeCapacity} ReplicaComputeCapacity
+                             * @throws {Error} If the payload is not a reader or valid buffer
+                             * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                             */
+                            ReplicaComputeCapacity.decodeDelimited = function decodeDelimited(reader) {
+                                if (!(reader instanceof $Reader))
+                                    reader = new $Reader(reader);
+                                return this.decode(reader, reader.uint32());
+                            };
+    
+                            /**
+                             * Verifies a ReplicaComputeCapacity message.
+                             * @function verify
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {Object.<string,*>} message Plain object to verify
+                             * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                             */
+                            ReplicaComputeCapacity.verify = function verify(message) {
+                                if (typeof message !== "object" || message === null)
+                                    return "object expected";
+                                var properties = {};
+                                if (message.replicaSelection != null && message.hasOwnProperty("replicaSelection")) {
+                                    var error = $root.google.spanner.admin.instance.v1.ReplicaSelection.verify(message.replicaSelection);
+                                    if (error)
+                                        return "replicaSelection." + error;
+                                }
+                                if (message.nodeCount != null && message.hasOwnProperty("nodeCount")) {
+                                    properties.computeCapacity = 1;
+                                    if (!$util.isInteger(message.nodeCount))
+                                        return "nodeCount: integer expected";
+                                }
+                                if (message.processingUnits != null && message.hasOwnProperty("processingUnits")) {
+                                    if (properties.computeCapacity === 1)
+                                        return "computeCapacity: multiple values";
+                                    properties.computeCapacity = 1;
+                                    if (!$util.isInteger(message.processingUnits))
+                                        return "processingUnits: integer expected";
+                                }
+                                return null;
+                            };
+    
+                            /**
+                             * Creates a ReplicaComputeCapacity message from a plain object. Also converts values to their respective internal types.
+                             * @function fromObject
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {Object.<string,*>} object Plain object
+                             * @returns {google.spanner.admin.instance.v1.ReplicaComputeCapacity} ReplicaComputeCapacity
+                             */
+                            ReplicaComputeCapacity.fromObject = function fromObject(object) {
+                                if (object instanceof $root.google.spanner.admin.instance.v1.ReplicaComputeCapacity)
+                                    return object;
+                                var message = new $root.google.spanner.admin.instance.v1.ReplicaComputeCapacity();
+                                if (object.replicaSelection != null) {
+                                    if (typeof object.replicaSelection !== "object")
+                                        throw TypeError(".google.spanner.admin.instance.v1.ReplicaComputeCapacity.replicaSelection: object expected");
+                                    message.replicaSelection = $root.google.spanner.admin.instance.v1.ReplicaSelection.fromObject(object.replicaSelection);
+                                }
+                                if (object.nodeCount != null)
+                                    message.nodeCount = object.nodeCount | 0;
+                                if (object.processingUnits != null)
+                                    message.processingUnits = object.processingUnits | 0;
+                                return message;
+                            };
+    
+                            /**
+                             * Creates a plain object from a ReplicaComputeCapacity message. Also converts values to other types if specified.
+                             * @function toObject
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {google.spanner.admin.instance.v1.ReplicaComputeCapacity} message ReplicaComputeCapacity
+                             * @param {$protobuf.IConversionOptions} [options] Conversion options
+                             * @returns {Object.<string,*>} Plain object
+                             */
+                            ReplicaComputeCapacity.toObject = function toObject(message, options) {
+                                if (!options)
+                                    options = {};
+                                var object = {};
+                                if (options.defaults)
+                                    object.replicaSelection = null;
+                                if (message.replicaSelection != null && message.hasOwnProperty("replicaSelection"))
+                                    object.replicaSelection = $root.google.spanner.admin.instance.v1.ReplicaSelection.toObject(message.replicaSelection, options);
+                                if (message.nodeCount != null && message.hasOwnProperty("nodeCount")) {
+                                    object.nodeCount = message.nodeCount;
+                                    if (options.oneofs)
+                                        object.computeCapacity = "nodeCount";
+                                }
+                                if (message.processingUnits != null && message.hasOwnProperty("processingUnits")) {
+                                    object.processingUnits = message.processingUnits;
+                                    if (options.oneofs)
+                                        object.computeCapacity = "processingUnits";
+                                }
+                                return object;
+                            };
+    
+                            /**
+                             * Converts this ReplicaComputeCapacity to JSON.
+                             * @function toJSON
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @instance
+                             * @returns {Object.<string,*>} JSON object
+                             */
+                            ReplicaComputeCapacity.prototype.toJSON = function toJSON() {
+                                return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                            };
+    
+                            /**
+                             * Gets the default type url for ReplicaComputeCapacity
+                             * @function getTypeUrl
+                             * @memberof google.spanner.admin.instance.v1.ReplicaComputeCapacity
+                             * @static
+                             * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                             * @returns {string} The default type url
+                             */
+                            ReplicaComputeCapacity.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                if (typeUrlPrefix === undefined) {
+                                    typeUrlPrefix = "type.googleapis.com";
+                                }
+                                return typeUrlPrefix + "/google.spanner.admin.instance.v1.ReplicaComputeCapacity";
+                            };
+    
+                            return ReplicaComputeCapacity;
+                        })();
+    
                         v1.AutoscalingConfig = (function() {
     
                             /**
@@ -35176,6 +35658,7 @@
                              * @interface IAutoscalingConfig
                              * @property {google.spanner.admin.instance.v1.AutoscalingConfig.IAutoscalingLimits|null} [autoscalingLimits] AutoscalingConfig autoscalingLimits
                              * @property {google.spanner.admin.instance.v1.AutoscalingConfig.IAutoscalingTargets|null} [autoscalingTargets] AutoscalingConfig autoscalingTargets
+                             * @property {Array.<google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption>|null} [asymmetricAutoscalingOptions] AutoscalingConfig asymmetricAutoscalingOptions
                              */
     
                             /**
@@ -35187,6 +35670,7 @@
                              * @param {google.spanner.admin.instance.v1.IAutoscalingConfig=} [properties] Properties to set
                              */
                             function AutoscalingConfig(properties) {
+                                this.asymmetricAutoscalingOptions = [];
                                 if (properties)
                                     for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                         if (properties[keys[i]] != null)
@@ -35209,6 +35693,14 @@
                              */
                             AutoscalingConfig.prototype.autoscalingTargets = null;
     
+                            /**
+                             * AutoscalingConfig asymmetricAutoscalingOptions.
+                             * @member {Array.<google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption>} asymmetricAutoscalingOptions
+                             * @memberof google.spanner.admin.instance.v1.AutoscalingConfig
+                             * @instance
+                             */
+                            AutoscalingConfig.prototype.asymmetricAutoscalingOptions = $util.emptyArray;
+    
                             /**
                              * Creates a new AutoscalingConfig instance using the specified properties.
                              * @function create
@@ -35237,6 +35729,9 @@
                                     $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingLimits.encode(message.autoscalingLimits, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
                                 if (message.autoscalingTargets != null && Object.hasOwnProperty.call(message, "autoscalingTargets"))
                                     $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingTargets.encode(message.autoscalingTargets, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                                if (message.asymmetricAutoscalingOptions != null && message.asymmetricAutoscalingOptions.length)
+                                    for (var i = 0; i < message.asymmetricAutoscalingOptions.length; ++i)
+                                        $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.encode(message.asymmetricAutoscalingOptions[i], writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
                                 return writer;
                             };
     
@@ -35279,6 +35774,12 @@
                                             message.autoscalingTargets = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingTargets.decode(reader, reader.uint32());
                                             break;
                                         }
+                                    case 3: {
+                                            if (!(message.asymmetricAutoscalingOptions && message.asymmetricAutoscalingOptions.length))
+                                                message.asymmetricAutoscalingOptions = [];
+                                            message.asymmetricAutoscalingOptions.push($root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.decode(reader, reader.uint32()));
+                                            break;
+                                        }
                                     default:
                                         reader.skipType(tag & 7);
                                         break;
@@ -35324,6 +35825,15 @@
                                     if (error)
                                         return "autoscalingTargets." + error;
                                 }
+                                if (message.asymmetricAutoscalingOptions != null && message.hasOwnProperty("asymmetricAutoscalingOptions")) {
+                                    if (!Array.isArray(message.asymmetricAutoscalingOptions))
+                                        return "asymmetricAutoscalingOptions: array expected";
+                                    for (var i = 0; i < message.asymmetricAutoscalingOptions.length; ++i) {
+                                        var error = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.verify(message.asymmetricAutoscalingOptions[i]);
+                                        if (error)
+                                            return "asymmetricAutoscalingOptions." + error;
+                                    }
+                                }
                                 return null;
                             };
     
@@ -35349,6 +35859,16 @@
                                         throw TypeError(".google.spanner.admin.instance.v1.AutoscalingConfig.autoscalingTargets: object expected");
                                     message.autoscalingTargets = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingTargets.fromObject(object.autoscalingTargets);
                                 }
+                                if (object.asymmetricAutoscalingOptions) {
+                                    if (!Array.isArray(object.asymmetricAutoscalingOptions))
+                                        throw TypeError(".google.spanner.admin.instance.v1.AutoscalingConfig.asymmetricAutoscalingOptions: array expected");
+                                    message.asymmetricAutoscalingOptions = [];
+                                    for (var i = 0; i < object.asymmetricAutoscalingOptions.length; ++i) {
+                                        if (typeof object.asymmetricAutoscalingOptions[i] !== "object")
+                                            throw TypeError(".google.spanner.admin.instance.v1.AutoscalingConfig.asymmetricAutoscalingOptions: object expected");
+                                        message.asymmetricAutoscalingOptions[i] = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.fromObject(object.asymmetricAutoscalingOptions[i]);
+                                    }
+                                }
                                 return message;
                             };
     
@@ -35365,6 +35885,8 @@
                                 if (!options)
                                     options = {};
                                 var object = {};
+                                if (options.arrays || options.defaults)
+                                    object.asymmetricAutoscalingOptions = [];
                                 if (options.defaults) {
                                     object.autoscalingLimits = null;
                                     object.autoscalingTargets = null;
@@ -35373,6 +35895,11 @@
                                     object.autoscalingLimits = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingLimits.toObject(message.autoscalingLimits, options);
                                 if (message.autoscalingTargets != null && message.hasOwnProperty("autoscalingTargets"))
                                     object.autoscalingTargets = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingTargets.toObject(message.autoscalingTargets, options);
+                                if (message.asymmetricAutoscalingOptions && message.asymmetricAutoscalingOptions.length) {
+                                    object.asymmetricAutoscalingOptions = [];
+                                    for (var j = 0; j < message.asymmetricAutoscalingOptions.length; ++j)
+                                        object.asymmetricAutoscalingOptions[j] = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.toObject(message.asymmetricAutoscalingOptions[j], options);
+                                }
                                 return object;
                             };
     
@@ -35946,6 +36473,475 @@
                                 return AutoscalingTargets;
                             })();
     
+                            AutoscalingConfig.AsymmetricAutoscalingOption = (function() {
+    
+                                /**
+                                 * Properties of an AsymmetricAutoscalingOption.
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig
+                                 * @interface IAsymmetricAutoscalingOption
+                                 * @property {google.spanner.admin.instance.v1.IReplicaSelection|null} [replicaSelection] AsymmetricAutoscalingOption replicaSelection
+                                 * @property {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides|null} [overrides] AsymmetricAutoscalingOption overrides
+                                 */
+    
+                                /**
+                                 * Constructs a new AsymmetricAutoscalingOption.
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig
+                                 * @classdesc Represents an AsymmetricAutoscalingOption.
+                                 * @implements IAsymmetricAutoscalingOption
+                                 * @constructor
+                                 * @param {google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption=} [properties] Properties to set
+                                 */
+                                function AsymmetricAutoscalingOption(properties) {
+                                    if (properties)
+                                        for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                            if (properties[keys[i]] != null)
+                                                this[keys[i]] = properties[keys[i]];
+                                }
+    
+                                /**
+                                 * AsymmetricAutoscalingOption replicaSelection.
+                                 * @member {google.spanner.admin.instance.v1.IReplicaSelection|null|undefined} replicaSelection
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @instance
+                                 */
+                                AsymmetricAutoscalingOption.prototype.replicaSelection = null;
+    
+                                /**
+                                 * AsymmetricAutoscalingOption overrides.
+                                 * @member {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides|null|undefined} overrides
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @instance
+                                 */
+                                AsymmetricAutoscalingOption.prototype.overrides = null;
+    
+                                /**
+                                 * Creates a new AsymmetricAutoscalingOption instance using the specified properties.
+                                 * @function create
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption=} [properties] Properties to set
+                                 * @returns {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption} AsymmetricAutoscalingOption instance
+                                 */
+                                AsymmetricAutoscalingOption.create = function create(properties) {
+                                    return new AsymmetricAutoscalingOption(properties);
+                                };
+    
+                                /**
+                                 * Encodes the specified AsymmetricAutoscalingOption message. Does not implicitly {@link google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.verify|verify} messages.
+                                 * @function encode
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption} message AsymmetricAutoscalingOption message or plain object to encode
+                                 * @param {$protobuf.Writer} [writer] Writer to encode to
+                                 * @returns {$protobuf.Writer} Writer
+                                 */
+                                AsymmetricAutoscalingOption.encode = function encode(message, writer) {
+                                    if (!writer)
+                                        writer = $Writer.create();
+                                    if (message.replicaSelection != null && Object.hasOwnProperty.call(message, "replicaSelection"))
+                                        $root.google.spanner.admin.instance.v1.ReplicaSelection.encode(message.replicaSelection, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                    if (message.overrides != null && Object.hasOwnProperty.call(message, "overrides"))
+                                        $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.encode(message.overrides, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                                    return writer;
+                                };
+    
+                                /**
+                                 * Encodes the specified AsymmetricAutoscalingOption message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.verify|verify} messages.
+                                 * @function encodeDelimited
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {google.spanner.admin.instance.v1.AutoscalingConfig.IAsymmetricAutoscalingOption} message AsymmetricAutoscalingOption message or plain object to encode
+                                 * @param {$protobuf.Writer} [writer] Writer to encode to
+                                 * @returns {$protobuf.Writer} Writer
+                                 */
+                                AsymmetricAutoscalingOption.encodeDelimited = function encodeDelimited(message, writer) {
+                                    return this.encode(message, writer).ldelim();
+                                };
+    
+                                /**
+                                 * Decodes an AsymmetricAutoscalingOption message from the specified reader or buffer.
+                                 * @function decode
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                 * @param {number} [length] Message length if known beforehand
+                                 * @returns {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption} AsymmetricAutoscalingOption
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                AsymmetricAutoscalingOption.decode = function decode(reader, length) {
+                                    if (!(reader instanceof $Reader))
+                                        reader = $Reader.create(reader);
+                                    var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption();
+                                    while (reader.pos < end) {
+                                        var tag = reader.uint32();
+                                        switch (tag >>> 3) {
+                                        case 1: {
+                                                message.replicaSelection = $root.google.spanner.admin.instance.v1.ReplicaSelection.decode(reader, reader.uint32());
+                                                break;
+                                            }
+                                        case 2: {
+                                                message.overrides = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.decode(reader, reader.uint32());
+                                                break;
+                                            }
+                                        default:
+                                            reader.skipType(tag & 7);
+                                            break;
+                                        }
+                                    }
+                                    return message;
+                                };
+    
+                                /**
+                                 * Decodes an AsymmetricAutoscalingOption message from the specified reader or buffer, length delimited.
+                                 * @function decodeDelimited
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                 * @returns {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption} AsymmetricAutoscalingOption
+                                 * @throws {Error} If the payload is not a reader or valid buffer
+                                 * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                 */
+                                AsymmetricAutoscalingOption.decodeDelimited = function decodeDelimited(reader) {
+                                    if (!(reader instanceof $Reader))
+                                        reader = new $Reader(reader);
+                                    return this.decode(reader, reader.uint32());
+                                };
+    
+                                /**
+                                 * Verifies an AsymmetricAutoscalingOption message.
+                                 * @function verify
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {Object.<string,*>} message Plain object to verify
+                                 * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                                 */
+                                AsymmetricAutoscalingOption.verify = function verify(message) {
+                                    if (typeof message !== "object" || message === null)
+                                        return "object expected";
+                                    if (message.replicaSelection != null && message.hasOwnProperty("replicaSelection")) {
+                                        var error = $root.google.spanner.admin.instance.v1.ReplicaSelection.verify(message.replicaSelection);
+                                        if (error)
+                                            return "replicaSelection." + error;
+                                    }
+                                    if (message.overrides != null && message.hasOwnProperty("overrides")) {
+                                        var error = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.verify(message.overrides);
+                                        if (error)
+                                            return "overrides." + error;
+                                    }
+                                    return null;
+                                };
+    
+                                /**
+                                 * Creates an AsymmetricAutoscalingOption message from a plain object. Also converts values to their respective internal types.
+                                 * @function fromObject
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {Object.<string,*>} object Plain object
+                                 * @returns {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption} AsymmetricAutoscalingOption
+                                 */
+                                AsymmetricAutoscalingOption.fromObject = function fromObject(object) {
+                                    if (object instanceof $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption)
+                                        return object;
+                                    var message = new $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption();
+                                    if (object.replicaSelection != null) {
+                                        if (typeof object.replicaSelection !== "object")
+                                            throw TypeError(".google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.replicaSelection: object expected");
+                                        message.replicaSelection = $root.google.spanner.admin.instance.v1.ReplicaSelection.fromObject(object.replicaSelection);
+                                    }
+                                    if (object.overrides != null) {
+                                        if (typeof object.overrides !== "object")
+                                            throw TypeError(".google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.overrides: object expected");
+                                        message.overrides = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.fromObject(object.overrides);
+                                    }
+                                    return message;
+                                };
+    
+                                /**
+                                 * Creates a plain object from an AsymmetricAutoscalingOption message. Also converts values to other types if specified.
+                                 * @function toObject
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption} message AsymmetricAutoscalingOption
+                                 * @param {$protobuf.IConversionOptions} [options] Conversion options
+                                 * @returns {Object.<string,*>} Plain object
+                                 */
+                                AsymmetricAutoscalingOption.toObject = function toObject(message, options) {
+                                    if (!options)
+                                        options = {};
+                                    var object = {};
+                                    if (options.defaults) {
+                                        object.replicaSelection = null;
+                                        object.overrides = null;
+                                    }
+                                    if (message.replicaSelection != null && message.hasOwnProperty("replicaSelection"))
+                                        object.replicaSelection = $root.google.spanner.admin.instance.v1.ReplicaSelection.toObject(message.replicaSelection, options);
+                                    if (message.overrides != null && message.hasOwnProperty("overrides"))
+                                        object.overrides = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.toObject(message.overrides, options);
+                                    return object;
+                                };
+    
+                                /**
+                                 * Converts this AsymmetricAutoscalingOption to JSON.
+                                 * @function toJSON
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @instance
+                                 * @returns {Object.<string,*>} JSON object
+                                 */
+                                AsymmetricAutoscalingOption.prototype.toJSON = function toJSON() {
+                                    return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                                };
+    
+                                /**
+                                 * Gets the default type url for AsymmetricAutoscalingOption
+                                 * @function getTypeUrl
+                                 * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                 * @static
+                                 * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                                 * @returns {string} The default type url
+                                 */
+                                AsymmetricAutoscalingOption.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                    if (typeUrlPrefix === undefined) {
+                                        typeUrlPrefix = "type.googleapis.com";
+                                    }
+                                    return typeUrlPrefix + "/google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption";
+                                };
+    
+                                AsymmetricAutoscalingOption.AutoscalingConfigOverrides = (function() {
+    
+                                    /**
+                                     * Properties of an AutoscalingConfigOverrides.
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                     * @interface IAutoscalingConfigOverrides
+                                     * @property {google.spanner.admin.instance.v1.AutoscalingConfig.IAutoscalingLimits|null} [autoscalingLimits] AutoscalingConfigOverrides autoscalingLimits
+                                     * @property {number|null} [autoscalingTargetHighPriorityCpuUtilizationPercent] AutoscalingConfigOverrides autoscalingTargetHighPriorityCpuUtilizationPercent
+                                     */
+    
+                                    /**
+                                     * Constructs a new AutoscalingConfigOverrides.
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption
+                                     * @classdesc Represents an AutoscalingConfigOverrides.
+                                     * @implements IAutoscalingConfigOverrides
+                                     * @constructor
+                                     * @param {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides=} [properties] Properties to set
+                                     */
+                                    function AutoscalingConfigOverrides(properties) {
+                                        if (properties)
+                                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                                if (properties[keys[i]] != null)
+                                                    this[keys[i]] = properties[keys[i]];
+                                    }
+    
+                                    /**
+                                     * AutoscalingConfigOverrides autoscalingLimits.
+                                     * @member {google.spanner.admin.instance.v1.AutoscalingConfig.IAutoscalingLimits|null|undefined} autoscalingLimits
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @instance
+                                     */
+                                    AutoscalingConfigOverrides.prototype.autoscalingLimits = null;
+    
+                                    /**
+                                     * AutoscalingConfigOverrides autoscalingTargetHighPriorityCpuUtilizationPercent.
+                                     * @member {number} autoscalingTargetHighPriorityCpuUtilizationPercent
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @instance
+                                     */
+                                    AutoscalingConfigOverrides.prototype.autoscalingTargetHighPriorityCpuUtilizationPercent = 0;
+    
+                                    /**
+                                     * Creates a new AutoscalingConfigOverrides instance using the specified properties.
+                                     * @function create
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides=} [properties] Properties to set
+                                     * @returns {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides} AutoscalingConfigOverrides instance
+                                     */
+                                    AutoscalingConfigOverrides.create = function create(properties) {
+                                        return new AutoscalingConfigOverrides(properties);
+                                    };
+    
+                                    /**
+                                     * Encodes the specified AutoscalingConfigOverrides message. Does not implicitly {@link google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.verify|verify} messages.
+                                     * @function encode
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides} message AutoscalingConfigOverrides message or plain object to encode
+                                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                                     * @returns {$protobuf.Writer} Writer
+                                     */
+                                    AutoscalingConfigOverrides.encode = function encode(message, writer) {
+                                        if (!writer)
+                                            writer = $Writer.create();
+                                        if (message.autoscalingLimits != null && Object.hasOwnProperty.call(message, "autoscalingLimits"))
+                                            $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingLimits.encode(message.autoscalingLimits, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                                        if (message.autoscalingTargetHighPriorityCpuUtilizationPercent != null && Object.hasOwnProperty.call(message, "autoscalingTargetHighPriorityCpuUtilizationPercent"))
+                                            writer.uint32(/* id 2, wireType 0 =*/16).int32(message.autoscalingTargetHighPriorityCpuUtilizationPercent);
+                                        return writer;
+                                    };
+    
+                                    /**
+                                     * Encodes the specified AutoscalingConfigOverrides message, length delimited. Does not implicitly {@link google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.verify|verify} messages.
+                                     * @function encodeDelimited
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.IAutoscalingConfigOverrides} message AutoscalingConfigOverrides message or plain object to encode
+                                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                                     * @returns {$protobuf.Writer} Writer
+                                     */
+                                    AutoscalingConfigOverrides.encodeDelimited = function encodeDelimited(message, writer) {
+                                        return this.encode(message, writer).ldelim();
+                                    };
+    
+                                    /**
+                                     * Decodes an AutoscalingConfigOverrides message from the specified reader or buffer.
+                                     * @function decode
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                     * @param {number} [length] Message length if known beforehand
+                                     * @returns {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides} AutoscalingConfigOverrides
+                                     * @throws {Error} If the payload is not a reader or valid buffer
+                                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                     */
+                                    AutoscalingConfigOverrides.decode = function decode(reader, length) {
+                                        if (!(reader instanceof $Reader))
+                                            reader = $Reader.create(reader);
+                                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides();
+                                        while (reader.pos < end) {
+                                            var tag = reader.uint32();
+                                            switch (tag >>> 3) {
+                                            case 1: {
+                                                    message.autoscalingLimits = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingLimits.decode(reader, reader.uint32());
+                                                    break;
+                                                }
+                                            case 2: {
+                                                    message.autoscalingTargetHighPriorityCpuUtilizationPercent = reader.int32();
+                                                    break;
+                                                }
+                                            default:
+                                                reader.skipType(tag & 7);
+                                                break;
+                                            }
+                                        }
+                                        return message;
+                                    };
+    
+                                    /**
+                                     * Decodes an AutoscalingConfigOverrides message from the specified reader or buffer, length delimited.
+                                     * @function decodeDelimited
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                                     * @returns {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides} AutoscalingConfigOverrides
+                                     * @throws {Error} If the payload is not a reader or valid buffer
+                                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                                     */
+                                    AutoscalingConfigOverrides.decodeDelimited = function decodeDelimited(reader) {
+                                        if (!(reader instanceof $Reader))
+                                            reader = new $Reader(reader);
+                                        return this.decode(reader, reader.uint32());
+                                    };
+    
+                                    /**
+                                     * Verifies an AutoscalingConfigOverrides message.
+                                     * @function verify
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {Object.<string,*>} message Plain object to verify
+                                     * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                                     */
+                                    AutoscalingConfigOverrides.verify = function verify(message) {
+                                        if (typeof message !== "object" || message === null)
+                                            return "object expected";
+                                        if (message.autoscalingLimits != null && message.hasOwnProperty("autoscalingLimits")) {
+                                            var error = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingLimits.verify(message.autoscalingLimits);
+                                            if (error)
+                                                return "autoscalingLimits." + error;
+                                        }
+                                        if (message.autoscalingTargetHighPriorityCpuUtilizationPercent != null && message.hasOwnProperty("autoscalingTargetHighPriorityCpuUtilizationPercent"))
+                                            if (!$util.isInteger(message.autoscalingTargetHighPriorityCpuUtilizationPercent))
+                                                return "autoscalingTargetHighPriorityCpuUtilizationPercent: integer expected";
+                                        return null;
+                                    };
+    
+                                    /**
+                                     * Creates an AutoscalingConfigOverrides message from a plain object. Also converts values to their respective internal types.
+                                     * @function fromObject
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {Object.<string,*>} object Plain object
+                                     * @returns {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides} AutoscalingConfigOverrides
+                                     */
+                                    AutoscalingConfigOverrides.fromObject = function fromObject(object) {
+                                        if (object instanceof $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides)
+                                            return object;
+                                        var message = new $root.google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides();
+                                        if (object.autoscalingLimits != null) {
+                                            if (typeof object.autoscalingLimits !== "object")
+                                                throw TypeError(".google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides.autoscalingLimits: object expected");
+                                            message.autoscalingLimits = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingLimits.fromObject(object.autoscalingLimits);
+                                        }
+                                        if (object.autoscalingTargetHighPriorityCpuUtilizationPercent != null)
+                                            message.autoscalingTargetHighPriorityCpuUtilizationPercent = object.autoscalingTargetHighPriorityCpuUtilizationPercent | 0;
+                                        return message;
+                                    };
+    
+                                    /**
+                                     * Creates a plain object from an AutoscalingConfigOverrides message. Also converts values to other types if specified.
+                                     * @function toObject
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides} message AutoscalingConfigOverrides
+                                     * @param {$protobuf.IConversionOptions} [options] Conversion options
+                                     * @returns {Object.<string,*>} Plain object
+                                     */
+                                    AutoscalingConfigOverrides.toObject = function toObject(message, options) {
+                                        if (!options)
+                                            options = {};
+                                        var object = {};
+                                        if (options.defaults) {
+                                            object.autoscalingLimits = null;
+                                            object.autoscalingTargetHighPriorityCpuUtilizationPercent = 0;
+                                        }
+                                        if (message.autoscalingLimits != null && message.hasOwnProperty("autoscalingLimits"))
+                                            object.autoscalingLimits = $root.google.spanner.admin.instance.v1.AutoscalingConfig.AutoscalingLimits.toObject(message.autoscalingLimits, options);
+                                        if (message.autoscalingTargetHighPriorityCpuUtilizationPercent != null && message.hasOwnProperty("autoscalingTargetHighPriorityCpuUtilizationPercent"))
+                                            object.autoscalingTargetHighPriorityCpuUtilizationPercent = message.autoscalingTargetHighPriorityCpuUtilizationPercent;
+                                        return object;
+                                    };
+    
+                                    /**
+                                     * Converts this AutoscalingConfigOverrides to JSON.
+                                     * @function toJSON
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @instance
+                                     * @returns {Object.<string,*>} JSON object
+                                     */
+                                    AutoscalingConfigOverrides.prototype.toJSON = function toJSON() {
+                                        return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                                    };
+    
+                                    /**
+                                     * Gets the default type url for AutoscalingConfigOverrides
+                                     * @function getTypeUrl
+                                     * @memberof google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides
+                                     * @static
+                                     * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                                     * @returns {string} The default type url
+                                     */
+                                    AutoscalingConfigOverrides.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                                        if (typeUrlPrefix === undefined) {
+                                            typeUrlPrefix = "type.googleapis.com";
+                                        }
+                                        return typeUrlPrefix + "/google.spanner.admin.instance.v1.AutoscalingConfig.AsymmetricAutoscalingOption.AutoscalingConfigOverrides";
+                                    };
+    
+                                    return AutoscalingConfigOverrides;
+                                })();
+    
+                                return AsymmetricAutoscalingOption;
+                            })();
+    
                             return AutoscalingConfig;
                         })();
     
@@ -35960,6 +36956,7 @@
                              * @property {string|null} [displayName] Instance displayName
                              * @property {number|null} [nodeCount] Instance nodeCount
                              * @property {number|null} [processingUnits] Instance processingUnits
+                             * @property {Array.<google.spanner.admin.instance.v1.IReplicaComputeCapacity>|null} [replicaComputeCapacity] Instance replicaComputeCapacity
                              * @property {google.spanner.admin.instance.v1.IAutoscalingConfig|null} [autoscalingConfig] Instance autoscalingConfig
                              * @property {google.spanner.admin.instance.v1.Instance.State|null} [state] Instance state
                              * @property {Object.<string,string>|null} [labels] Instance labels
@@ -35967,6 +36964,7 @@
                              * @property {google.protobuf.ITimestamp|null} [createTime] Instance createTime
                              * @property {google.protobuf.ITimestamp|null} [updateTime] Instance updateTime
                              * @property {google.spanner.admin.instance.v1.Instance.Edition|null} [edition] Instance edition
+                             * @property {google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType|null} [defaultBackupScheduleType] Instance defaultBackupScheduleType
                              */
     
                             /**
@@ -35978,6 +36976,7 @@
                              * @param {google.spanner.admin.instance.v1.IInstance=} [properties] Properties to set
                              */
                             function Instance(properties) {
+                                this.replicaComputeCapacity = [];
                                 this.labels = {};
                                 this.endpointUris = [];
                                 if (properties)
@@ -36026,6 +37025,14 @@
                              */
                             Instance.prototype.processingUnits = 0;
     
+                            /**
+                             * Instance replicaComputeCapacity.
+                             * @member {Array.<google.spanner.admin.instance.v1.IReplicaComputeCapacity>} replicaComputeCapacity
+                             * @memberof google.spanner.admin.instance.v1.Instance
+                             * @instance
+                             */
+                            Instance.prototype.replicaComputeCapacity = $util.emptyArray;
+    
                             /**
                              * Instance autoscalingConfig.
                              * @member {google.spanner.admin.instance.v1.IAutoscalingConfig|null|undefined} autoscalingConfig
@@ -36082,6 +37089,14 @@
                              */
                             Instance.prototype.edition = 0;
     
+                            /**
+                             * Instance defaultBackupScheduleType.
+                             * @member {google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType} defaultBackupScheduleType
+                             * @memberof google.spanner.admin.instance.v1.Instance
+                             * @instance
+                             */
+                            Instance.prototype.defaultBackupScheduleType = 0;
+    
                             /**
                              * Creates a new Instance instance using the specified properties.
                              * @function create
@@ -36130,8 +37145,13 @@
                                     $root.google.protobuf.Timestamp.encode(message.updateTime, writer.uint32(/* id 12, wireType 2 =*/98).fork()).ldelim();
                                 if (message.autoscalingConfig != null && Object.hasOwnProperty.call(message, "autoscalingConfig"))
                                     $root.google.spanner.admin.instance.v1.AutoscalingConfig.encode(message.autoscalingConfig, writer.uint32(/* id 17, wireType 2 =*/138).fork()).ldelim();
+                                if (message.replicaComputeCapacity != null && message.replicaComputeCapacity.length)
+                                    for (var i = 0; i < message.replicaComputeCapacity.length; ++i)
+                                        $root.google.spanner.admin.instance.v1.ReplicaComputeCapacity.encode(message.replicaComputeCapacity[i], writer.uint32(/* id 19, wireType 2 =*/154).fork()).ldelim();
                                 if (message.edition != null && Object.hasOwnProperty.call(message, "edition"))
                                     writer.uint32(/* id 20, wireType 0 =*/160).int32(message.edition);
+                                if (message.defaultBackupScheduleType != null && Object.hasOwnProperty.call(message, "defaultBackupScheduleType"))
+                                    writer.uint32(/* id 23, wireType 0 =*/184).int32(message.defaultBackupScheduleType);
                                 return writer;
                             };
     
@@ -36186,6 +37206,12 @@
                                             message.processingUnits = reader.int32();
                                             break;
                                         }
+                                    case 19: {
+                                            if (!(message.replicaComputeCapacity && message.replicaComputeCapacity.length))
+                                                message.replicaComputeCapacity = [];
+                                            message.replicaComputeCapacity.push($root.google.spanner.admin.instance.v1.ReplicaComputeCapacity.decode(reader, reader.uint32()));
+                                            break;
+                                        }
                                     case 17: {
                                             message.autoscalingConfig = $root.google.spanner.admin.instance.v1.AutoscalingConfig.decode(reader, reader.uint32());
                                             break;
@@ -36235,6 +37261,10 @@
                                             message.edition = reader.int32();
                                             break;
                                         }
+                                    case 23: {
+                                            message.defaultBackupScheduleType = reader.int32();
+                                            break;
+                                        }
                                     default:
                                         reader.skipType(tag & 7);
                                         break;
@@ -36285,6 +37315,15 @@
                                 if (message.processingUnits != null && message.hasOwnProperty("processingUnits"))
                                     if (!$util.isInteger(message.processingUnits))
                                         return "processingUnits: integer expected";
+                                if (message.replicaComputeCapacity != null && message.hasOwnProperty("replicaComputeCapacity")) {
+                                    if (!Array.isArray(message.replicaComputeCapacity))
+                                        return "replicaComputeCapacity: array expected";
+                                    for (var i = 0; i < message.replicaComputeCapacity.length; ++i) {
+                                        var error = $root.google.spanner.admin.instance.v1.ReplicaComputeCapacity.verify(message.replicaComputeCapacity[i]);
+                                        if (error)
+                                            return "replicaComputeCapacity." + error;
+                                    }
+                                }
                                 if (message.autoscalingConfig != null && message.hasOwnProperty("autoscalingConfig")) {
                                     var error = $root.google.spanner.admin.instance.v1.AutoscalingConfig.verify(message.autoscalingConfig);
                                     if (error)
@@ -36334,6 +37373,15 @@
                                     case 3:
                                         break;
                                     }
+                                if (message.defaultBackupScheduleType != null && message.hasOwnProperty("defaultBackupScheduleType"))
+                                    switch (message.defaultBackupScheduleType) {
+                                    default:
+                                        return "defaultBackupScheduleType: enum value expected";
+                                    case 0:
+                                    case 1:
+                                    case 2:
+                                        break;
+                                    }
                                 return null;
                             };
     
@@ -36359,6 +37407,16 @@
                                     message.nodeCount = object.nodeCount | 0;
                                 if (object.processingUnits != null)
                                     message.processingUnits = object.processingUnits | 0;
+                                if (object.replicaComputeCapacity) {
+                                    if (!Array.isArray(object.replicaComputeCapacity))
+                                        throw TypeError(".google.spanner.admin.instance.v1.Instance.replicaComputeCapacity: array expected");
+                                    message.replicaComputeCapacity = [];
+                                    for (var i = 0; i < object.replicaComputeCapacity.length; ++i) {
+                                        if (typeof object.replicaComputeCapacity[i] !== "object")
+                                            throw TypeError(".google.spanner.admin.instance.v1.Instance.replicaComputeCapacity: object expected");
+                                        message.replicaComputeCapacity[i] = $root.google.spanner.admin.instance.v1.ReplicaComputeCapacity.fromObject(object.replicaComputeCapacity[i]);
+                                    }
+                                }
                                 if (object.autoscalingConfig != null) {
                                     if (typeof object.autoscalingConfig !== "object")
                                         throw TypeError(".google.spanner.admin.instance.v1.Instance.autoscalingConfig: object expected");
@@ -36432,6 +37490,26 @@
                                     message.edition = 3;
                                     break;
                                 }
+                                switch (object.defaultBackupScheduleType) {
+                                default:
+                                    if (typeof object.defaultBackupScheduleType === "number") {
+                                        message.defaultBackupScheduleType = object.defaultBackupScheduleType;
+                                        break;
+                                    }
+                                    break;
+                                case "DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED":
+                                case 0:
+                                    message.defaultBackupScheduleType = 0;
+                                    break;
+                                case "NONE":
+                                case 1:
+                                    message.defaultBackupScheduleType = 1;
+                                    break;
+                                case "AUTOMATIC":
+                                case 2:
+                                    message.defaultBackupScheduleType = 2;
+                                    break;
+                                }
                                 return message;
                             };
     
@@ -36448,8 +37526,10 @@
                                 if (!options)
                                     options = {};
                                 var object = {};
-                                if (options.arrays || options.defaults)
+                                if (options.arrays || options.defaults) {
                                     object.endpointUris = [];
+                                    object.replicaComputeCapacity = [];
+                                }
                                 if (options.objects || options.defaults)
                                     object.labels = {};
                                 if (options.defaults) {
@@ -36463,6 +37543,7 @@
                                     object.updateTime = null;
                                     object.autoscalingConfig = null;
                                     object.edition = options.enums === String ? "EDITION_UNSPECIFIED" : 0;
+                                    object.defaultBackupScheduleType = options.enums === String ? "DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED" : 0;
                                 }
                                 if (message.name != null && message.hasOwnProperty("name"))
                                     object.name = message.name;
@@ -36493,8 +37574,15 @@
                                     object.updateTime = $root.google.protobuf.Timestamp.toObject(message.updateTime, options);
                                 if (message.autoscalingConfig != null && message.hasOwnProperty("autoscalingConfig"))
                                     object.autoscalingConfig = $root.google.spanner.admin.instance.v1.AutoscalingConfig.toObject(message.autoscalingConfig, options);
+                                if (message.replicaComputeCapacity && message.replicaComputeCapacity.length) {
+                                    object.replicaComputeCapacity = [];
+                                    for (var j = 0; j < message.replicaComputeCapacity.length; ++j)
+                                        object.replicaComputeCapacity[j] = $root.google.spanner.admin.instance.v1.ReplicaComputeCapacity.toObject(message.replicaComputeCapacity[j], options);
+                                }
                                 if (message.edition != null && message.hasOwnProperty("edition"))
                                     object.edition = options.enums === String ? $root.google.spanner.admin.instance.v1.Instance.Edition[message.edition] === undefined ? message.edition : $root.google.spanner.admin.instance.v1.Instance.Edition[message.edition] : message.edition;
+                                if (message.defaultBackupScheduleType != null && message.hasOwnProperty("defaultBackupScheduleType"))
+                                    object.defaultBackupScheduleType = options.enums === String ? $root.google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType[message.defaultBackupScheduleType] === undefined ? message.defaultBackupScheduleType : $root.google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType[message.defaultBackupScheduleType] : message.defaultBackupScheduleType;
                                 return object;
                             };
     
@@ -36558,6 +37646,22 @@
                                 return values;
                             })();
     
+                            /**
+                             * DefaultBackupScheduleType enum.
+                             * @name google.spanner.admin.instance.v1.Instance.DefaultBackupScheduleType
+                             * @enum {number}
+                             * @property {number} DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED=0 DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED value
+                             * @property {number} NONE=1 NONE value
+                             * @property {number} AUTOMATIC=2 AUTOMATIC value
+                             */
+                            Instance.DefaultBackupScheduleType = (function() {
+                                var valuesById = {}, values = Object.create(valuesById);
+                                values[valuesById[0] = "DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED"] = 0;
+                                values[valuesById[1] = "NONE"] = 1;
+                                values[valuesById[2] = "AUTOMATIC"] = 2;
+                                return values;
+                            })();
+    
                             return Instance;
                         })();
     
@@ -74314,6 +75418,8 @@
                             case 0:
                             case 1:
                             case 2:
+                            case 3:
+                            case 4:
                                 break;
                             }
                         if (message.partitionToken != null && message.hasOwnProperty("partitionToken"))
@@ -74403,6 +75509,14 @@
                         case 2:
                             message.queryMode = 2;
                             break;
+                        case "WITH_STATS":
+                        case 3:
+                            message.queryMode = 3;
+                            break;
+                        case "WITH_PLAN_AND_STATS":
+                        case 4:
+                            message.queryMode = 4;
+                            break;
                         }
                         if (object.partitionToken != null)
                             if (typeof object.partitionToken === "string")
@@ -74552,12 +75666,16 @@
                      * @property {number} NORMAL=0 NORMAL value
                      * @property {number} PLAN=1 PLAN value
                      * @property {number} PROFILE=2 PROFILE value
+                     * @property {number} WITH_STATS=3 WITH_STATS value
+                     * @property {number} WITH_PLAN_AND_STATS=4 WITH_PLAN_AND_STATS value
                      */
                     ExecuteSqlRequest.QueryMode = (function() {
                         var valuesById = {}, values = Object.create(valuesById);
                         values[valuesById[0] = "NORMAL"] = 0;
                         values[valuesById[1] = "PLAN"] = 1;
                         values[valuesById[2] = "PROFILE"] = 2;
+                        values[valuesById[3] = "WITH_STATS"] = 3;
+                        values[valuesById[4] = "WITH_PLAN_AND_STATS"] = 4;
                         return values;
                     })();
     
@@ -75439,6 +76557,7 @@
                      * @interface IExecuteBatchDmlResponse
                      * @property {Array.<google.spanner.v1.IResultSet>|null} [resultSets] ExecuteBatchDmlResponse resultSets
                      * @property {google.rpc.IStatus|null} [status] ExecuteBatchDmlResponse status
+                     * @property {google.spanner.v1.IMultiplexedSessionPrecommitToken|null} [precommitToken] ExecuteBatchDmlResponse precommitToken
                      */
     
                     /**
@@ -75473,6 +76592,14 @@
                      */
                     ExecuteBatchDmlResponse.prototype.status = null;
     
+                    /**
+                     * ExecuteBatchDmlResponse precommitToken.
+                     * @member {google.spanner.v1.IMultiplexedSessionPrecommitToken|null|undefined} precommitToken
+                     * @memberof google.spanner.v1.ExecuteBatchDmlResponse
+                     * @instance
+                     */
+                    ExecuteBatchDmlResponse.prototype.precommitToken = null;
+    
                     /**
                      * Creates a new ExecuteBatchDmlResponse instance using the specified properties.
                      * @function create
@@ -75502,6 +76629,8 @@
                                 $root.google.spanner.v1.ResultSet.encode(message.resultSets[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
                         if (message.status != null && Object.hasOwnProperty.call(message, "status"))
                             $root.google.rpc.Status.encode(message.status, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.precommitToken != null && Object.hasOwnProperty.call(message, "precommitToken"))
+                            $root.google.spanner.v1.MultiplexedSessionPrecommitToken.encode(message.precommitToken, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
                         return writer;
                     };
     
@@ -75546,6 +76675,10 @@
                                     message.status = $root.google.rpc.Status.decode(reader, reader.uint32());
                                     break;
                                 }
+                            case 3: {
+                                    message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.decode(reader, reader.uint32());
+                                    break;
+                                }
                             default:
                                 reader.skipType(tag & 7);
                                 break;
@@ -75595,6 +76728,11 @@
                             if (error)
                                 return "status." + error;
                         }
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken")) {
+                            var error = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.verify(message.precommitToken);
+                            if (error)
+                                return "precommitToken." + error;
+                        }
                         return null;
                     };
     
@@ -75625,6 +76763,11 @@
                                 throw TypeError(".google.spanner.v1.ExecuteBatchDmlResponse.status: object expected");
                             message.status = $root.google.rpc.Status.fromObject(object.status);
                         }
+                        if (object.precommitToken != null) {
+                            if (typeof object.precommitToken !== "object")
+                                throw TypeError(".google.spanner.v1.ExecuteBatchDmlResponse.precommitToken: object expected");
+                            message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.fromObject(object.precommitToken);
+                        }
                         return message;
                     };
     
@@ -75643,8 +76786,10 @@
                         var object = {};
                         if (options.arrays || options.defaults)
                             object.resultSets = [];
-                        if (options.defaults)
+                        if (options.defaults) {
                             object.status = null;
+                            object.precommitToken = null;
+                        }
                         if (message.resultSets && message.resultSets.length) {
                             object.resultSets = [];
                             for (var j = 0; j < message.resultSets.length; ++j)
@@ -75652,6 +76797,8 @@
                         }
                         if (message.status != null && message.hasOwnProperty("status"))
                             object.status = $root.google.rpc.Status.toObject(message.status, options);
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken"))
+                            object.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.toObject(message.precommitToken, options);
                         return object;
                     };
     
@@ -77816,6 +78963,7 @@
                      * @property {string|null} [session] BeginTransactionRequest session
                      * @property {google.spanner.v1.ITransactionOptions|null} [options] BeginTransactionRequest options
                      * @property {google.spanner.v1.IRequestOptions|null} [requestOptions] BeginTransactionRequest requestOptions
+                     * @property {google.spanner.v1.IMutation|null} [mutationKey] BeginTransactionRequest mutationKey
                      */
     
                     /**
@@ -77857,6 +79005,14 @@
                      */
                     BeginTransactionRequest.prototype.requestOptions = null;
     
+                    /**
+                     * BeginTransactionRequest mutationKey.
+                     * @member {google.spanner.v1.IMutation|null|undefined} mutationKey
+                     * @memberof google.spanner.v1.BeginTransactionRequest
+                     * @instance
+                     */
+                    BeginTransactionRequest.prototype.mutationKey = null;
+    
                     /**
                      * Creates a new BeginTransactionRequest instance using the specified properties.
                      * @function create
@@ -77887,6 +79043,8 @@
                             $root.google.spanner.v1.TransactionOptions.encode(message.options, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
                         if (message.requestOptions != null && Object.hasOwnProperty.call(message, "requestOptions"))
                             $root.google.spanner.v1.RequestOptions.encode(message.requestOptions, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        if (message.mutationKey != null && Object.hasOwnProperty.call(message, "mutationKey"))
+                            $root.google.spanner.v1.Mutation.encode(message.mutationKey, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
                         return writer;
                     };
     
@@ -77933,6 +79091,10 @@
                                     message.requestOptions = $root.google.spanner.v1.RequestOptions.decode(reader, reader.uint32());
                                     break;
                                 }
+                            case 4: {
+                                    message.mutationKey = $root.google.spanner.v1.Mutation.decode(reader, reader.uint32());
+                                    break;
+                                }
                             default:
                                 reader.skipType(tag & 7);
                                 break;
@@ -77981,6 +79143,11 @@
                             if (error)
                                 return "requestOptions." + error;
                         }
+                        if (message.mutationKey != null && message.hasOwnProperty("mutationKey")) {
+                            var error = $root.google.spanner.v1.Mutation.verify(message.mutationKey);
+                            if (error)
+                                return "mutationKey." + error;
+                        }
                         return null;
                     };
     
@@ -78008,6 +79175,11 @@
                                 throw TypeError(".google.spanner.v1.BeginTransactionRequest.requestOptions: object expected");
                             message.requestOptions = $root.google.spanner.v1.RequestOptions.fromObject(object.requestOptions);
                         }
+                        if (object.mutationKey != null) {
+                            if (typeof object.mutationKey !== "object")
+                                throw TypeError(".google.spanner.v1.BeginTransactionRequest.mutationKey: object expected");
+                            message.mutationKey = $root.google.spanner.v1.Mutation.fromObject(object.mutationKey);
+                        }
                         return message;
                     };
     
@@ -78028,6 +79200,7 @@
                             object.session = "";
                             object.options = null;
                             object.requestOptions = null;
+                            object.mutationKey = null;
                         }
                         if (message.session != null && message.hasOwnProperty("session"))
                             object.session = message.session;
@@ -78035,6 +79208,8 @@
                             object.options = $root.google.spanner.v1.TransactionOptions.toObject(message.options, options);
                         if (message.requestOptions != null && message.hasOwnProperty("requestOptions"))
                             object.requestOptions = $root.google.spanner.v1.RequestOptions.toObject(message.requestOptions, options);
+                        if (message.mutationKey != null && message.hasOwnProperty("mutationKey"))
+                            object.mutationKey = $root.google.spanner.v1.Mutation.toObject(message.mutationKey, options);
                         return object;
                     };
     
@@ -78080,6 +79255,7 @@
                      * @property {boolean|null} [returnCommitStats] CommitRequest returnCommitStats
                      * @property {google.protobuf.IDuration|null} [maxCommitDelay] CommitRequest maxCommitDelay
                      * @property {google.spanner.v1.IRequestOptions|null} [requestOptions] CommitRequest requestOptions
+                     * @property {google.spanner.v1.IMultiplexedSessionPrecommitToken|null} [precommitToken] CommitRequest precommitToken
                      */
     
                     /**
@@ -78154,6 +79330,14 @@
                      */
                     CommitRequest.prototype.requestOptions = null;
     
+                    /**
+                     * CommitRequest precommitToken.
+                     * @member {google.spanner.v1.IMultiplexedSessionPrecommitToken|null|undefined} precommitToken
+                     * @memberof google.spanner.v1.CommitRequest
+                     * @instance
+                     */
+                    CommitRequest.prototype.precommitToken = null;
+    
                     // OneOf field names bound to virtual getters and setters
                     var $oneOfFields;
     
@@ -78207,6 +79391,8 @@
                             $root.google.spanner.v1.RequestOptions.encode(message.requestOptions, writer.uint32(/* id 6, wireType 2 =*/50).fork()).ldelim();
                         if (message.maxCommitDelay != null && Object.hasOwnProperty.call(message, "maxCommitDelay"))
                             $root.google.protobuf.Duration.encode(message.maxCommitDelay, writer.uint32(/* id 8, wireType 2 =*/66).fork()).ldelim();
+                        if (message.precommitToken != null && Object.hasOwnProperty.call(message, "precommitToken"))
+                            $root.google.spanner.v1.MultiplexedSessionPrecommitToken.encode(message.precommitToken, writer.uint32(/* id 9, wireType 2 =*/74).fork()).ldelim();
                         return writer;
                     };
     
@@ -78271,6 +79457,10 @@
                                     message.requestOptions = $root.google.spanner.v1.RequestOptions.decode(reader, reader.uint32());
                                     break;
                                 }
+                            case 9: {
+                                    message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.decode(reader, reader.uint32());
+                                    break;
+                                }
                             default:
                                 reader.skipType(tag & 7);
                                 break;
@@ -78347,6 +79537,11 @@
                             if (error)
                                 return "requestOptions." + error;
                         }
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken")) {
+                            var error = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.verify(message.precommitToken);
+                            if (error)
+                                return "precommitToken." + error;
+                        }
                         return null;
                     };
     
@@ -78396,6 +79591,11 @@
                                 throw TypeError(".google.spanner.v1.CommitRequest.requestOptions: object expected");
                             message.requestOptions = $root.google.spanner.v1.RequestOptions.fromObject(object.requestOptions);
                         }
+                        if (object.precommitToken != null) {
+                            if (typeof object.precommitToken !== "object")
+                                throw TypeError(".google.spanner.v1.CommitRequest.precommitToken: object expected");
+                            message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.fromObject(object.precommitToken);
+                        }
                         return message;
                     };
     
@@ -78419,6 +79619,7 @@
                             object.returnCommitStats = false;
                             object.requestOptions = null;
                             object.maxCommitDelay = null;
+                            object.precommitToken = null;
                         }
                         if (message.session != null && message.hasOwnProperty("session"))
                             object.session = message.session;
@@ -78443,6 +79644,8 @@
                             object.requestOptions = $root.google.spanner.v1.RequestOptions.toObject(message.requestOptions, options);
                         if (message.maxCommitDelay != null && message.hasOwnProperty("maxCommitDelay"))
                             object.maxCommitDelay = $root.google.protobuf.Duration.toObject(message.maxCommitDelay, options);
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken"))
+                            object.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.toObject(message.precommitToken, options);
                         return object;
                     };
     
@@ -79528,6 +80731,7 @@
                      * @interface ICommitResponse
                      * @property {google.protobuf.ITimestamp|null} [commitTimestamp] CommitResponse commitTimestamp
                      * @property {google.spanner.v1.CommitResponse.ICommitStats|null} [commitStats] CommitResponse commitStats
+                     * @property {google.spanner.v1.IMultiplexedSessionPrecommitToken|null} [precommitToken] CommitResponse precommitToken
                      */
     
                     /**
@@ -79561,6 +80765,28 @@
                      */
                     CommitResponse.prototype.commitStats = null;
     
+                    /**
+                     * CommitResponse precommitToken.
+                     * @member {google.spanner.v1.IMultiplexedSessionPrecommitToken|null|undefined} precommitToken
+                     * @memberof google.spanner.v1.CommitResponse
+                     * @instance
+                     */
+                    CommitResponse.prototype.precommitToken = null;
+    
+                    // OneOf field names bound to virtual getters and setters
+                    var $oneOfFields;
+    
+                    /**
+                     * CommitResponse MultiplexedSessionRetry.
+                     * @member {"precommitToken"|undefined} MultiplexedSessionRetry
+                     * @memberof google.spanner.v1.CommitResponse
+                     * @instance
+                     */
+                    Object.defineProperty(CommitResponse.prototype, "MultiplexedSessionRetry", {
+                        get: $util.oneOfGetter($oneOfFields = ["precommitToken"]),
+                        set: $util.oneOfSetter($oneOfFields)
+                    });
+    
                     /**
                      * Creates a new CommitResponse instance using the specified properties.
                      * @function create
@@ -79589,6 +80815,8 @@
                             $root.google.protobuf.Timestamp.encode(message.commitTimestamp, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
                         if (message.commitStats != null && Object.hasOwnProperty.call(message, "commitStats"))
                             $root.google.spanner.v1.CommitResponse.CommitStats.encode(message.commitStats, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.precommitToken != null && Object.hasOwnProperty.call(message, "precommitToken"))
+                            $root.google.spanner.v1.MultiplexedSessionPrecommitToken.encode(message.precommitToken, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
                         return writer;
                     };
     
@@ -79631,6 +80859,10 @@
                                     message.commitStats = $root.google.spanner.v1.CommitResponse.CommitStats.decode(reader, reader.uint32());
                                     break;
                                 }
+                            case 4: {
+                                    message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.decode(reader, reader.uint32());
+                                    break;
+                                }
                             default:
                                 reader.skipType(tag & 7);
                                 break;
@@ -79666,6 +80898,7 @@
                     CommitResponse.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
+                        var properties = {};
                         if (message.commitTimestamp != null && message.hasOwnProperty("commitTimestamp")) {
                             var error = $root.google.protobuf.Timestamp.verify(message.commitTimestamp);
                             if (error)
@@ -79676,6 +80909,14 @@
                             if (error)
                                 return "commitStats." + error;
                         }
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken")) {
+                            properties.MultiplexedSessionRetry = 1;
+                            {
+                                var error = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.verify(message.precommitToken);
+                                if (error)
+                                    return "precommitToken." + error;
+                            }
+                        }
                         return null;
                     };
     
@@ -79701,6 +80942,11 @@
                                 throw TypeError(".google.spanner.v1.CommitResponse.commitStats: object expected");
                             message.commitStats = $root.google.spanner.v1.CommitResponse.CommitStats.fromObject(object.commitStats);
                         }
+                        if (object.precommitToken != null) {
+                            if (typeof object.precommitToken !== "object")
+                                throw TypeError(".google.spanner.v1.CommitResponse.precommitToken: object expected");
+                            message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.fromObject(object.precommitToken);
+                        }
                         return message;
                     };
     
@@ -79725,6 +80971,11 @@
                             object.commitTimestamp = $root.google.protobuf.Timestamp.toObject(message.commitTimestamp, options);
                         if (message.commitStats != null && message.hasOwnProperty("commitStats"))
                             object.commitStats = $root.google.spanner.v1.CommitResponse.CommitStats.toObject(message.commitStats, options);
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken")) {
+                            object.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.toObject(message.precommitToken, options);
+                            if (options.oneofs)
+                                object.MultiplexedSessionRetry = "precommitToken";
+                        }
                         return object;
                     };
     
@@ -79974,27 +81225,27 @@
                     return CommitResponse;
                 })();
     
-                v1.KeyRange = (function() {
+                v1.TransactionOptions = (function() {
     
                     /**
-                     * Properties of a KeyRange.
+                     * Properties of a TransactionOptions.
                      * @memberof google.spanner.v1
-                     * @interface IKeyRange
-                     * @property {google.protobuf.IListValue|null} [startClosed] KeyRange startClosed
-                     * @property {google.protobuf.IListValue|null} [startOpen] KeyRange startOpen
-                     * @property {google.protobuf.IListValue|null} [endClosed] KeyRange endClosed
-                     * @property {google.protobuf.IListValue|null} [endOpen] KeyRange endOpen
+                     * @interface ITransactionOptions
+                     * @property {google.spanner.v1.TransactionOptions.IReadWrite|null} [readWrite] TransactionOptions readWrite
+                     * @property {google.spanner.v1.TransactionOptions.IPartitionedDml|null} [partitionedDml] TransactionOptions partitionedDml
+                     * @property {google.spanner.v1.TransactionOptions.IReadOnly|null} [readOnly] TransactionOptions readOnly
+                     * @property {boolean|null} [excludeTxnFromChangeStreams] TransactionOptions excludeTxnFromChangeStreams
                      */
     
                     /**
-                     * Constructs a new KeyRange.
+                     * Constructs a new TransactionOptions.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a KeyRange.
-                     * @implements IKeyRange
+                     * @classdesc Represents a TransactionOptions.
+                     * @implements ITransactionOptions
                      * @constructor
-                     * @param {google.spanner.v1.IKeyRange=} [properties] Properties to set
+                     * @param {google.spanner.v1.ITransactionOptions=} [properties] Properties to set
                      */
-                    function KeyRange(properties) {
+                    function TransactionOptions(properties) {
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -80002,142 +81253,131 @@
                     }
     
                     /**
-                     * KeyRange startClosed.
-                     * @member {google.protobuf.IListValue|null|undefined} startClosed
-                     * @memberof google.spanner.v1.KeyRange
+                     * TransactionOptions readWrite.
+                     * @member {google.spanner.v1.TransactionOptions.IReadWrite|null|undefined} readWrite
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @instance
                      */
-                    KeyRange.prototype.startClosed = null;
+                    TransactionOptions.prototype.readWrite = null;
     
                     /**
-                     * KeyRange startOpen.
-                     * @member {google.protobuf.IListValue|null|undefined} startOpen
-                     * @memberof google.spanner.v1.KeyRange
+                     * TransactionOptions partitionedDml.
+                     * @member {google.spanner.v1.TransactionOptions.IPartitionedDml|null|undefined} partitionedDml
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @instance
                      */
-                    KeyRange.prototype.startOpen = null;
+                    TransactionOptions.prototype.partitionedDml = null;
     
                     /**
-                     * KeyRange endClosed.
-                     * @member {google.protobuf.IListValue|null|undefined} endClosed
-                     * @memberof google.spanner.v1.KeyRange
+                     * TransactionOptions readOnly.
+                     * @member {google.spanner.v1.TransactionOptions.IReadOnly|null|undefined} readOnly
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @instance
                      */
-                    KeyRange.prototype.endClosed = null;
+                    TransactionOptions.prototype.readOnly = null;
     
                     /**
-                     * KeyRange endOpen.
-                     * @member {google.protobuf.IListValue|null|undefined} endOpen
-                     * @memberof google.spanner.v1.KeyRange
+                     * TransactionOptions excludeTxnFromChangeStreams.
+                     * @member {boolean} excludeTxnFromChangeStreams
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @instance
                      */
-                    KeyRange.prototype.endOpen = null;
+                    TransactionOptions.prototype.excludeTxnFromChangeStreams = false;
     
                     // OneOf field names bound to virtual getters and setters
                     var $oneOfFields;
     
                     /**
-                     * KeyRange startKeyType.
-                     * @member {"startClosed"|"startOpen"|undefined} startKeyType
-                     * @memberof google.spanner.v1.KeyRange
-                     * @instance
-                     */
-                    Object.defineProperty(KeyRange.prototype, "startKeyType", {
-                        get: $util.oneOfGetter($oneOfFields = ["startClosed", "startOpen"]),
-                        set: $util.oneOfSetter($oneOfFields)
-                    });
-    
-                    /**
-                     * KeyRange endKeyType.
-                     * @member {"endClosed"|"endOpen"|undefined} endKeyType
-                     * @memberof google.spanner.v1.KeyRange
+                     * TransactionOptions mode.
+                     * @member {"readWrite"|"partitionedDml"|"readOnly"|undefined} mode
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @instance
                      */
-                    Object.defineProperty(KeyRange.prototype, "endKeyType", {
-                        get: $util.oneOfGetter($oneOfFields = ["endClosed", "endOpen"]),
+                    Object.defineProperty(TransactionOptions.prototype, "mode", {
+                        get: $util.oneOfGetter($oneOfFields = ["readWrite", "partitionedDml", "readOnly"]),
                         set: $util.oneOfSetter($oneOfFields)
                     });
     
                     /**
-                     * Creates a new KeyRange instance using the specified properties.
+                     * Creates a new TransactionOptions instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
-                     * @param {google.spanner.v1.IKeyRange=} [properties] Properties to set
-                     * @returns {google.spanner.v1.KeyRange} KeyRange instance
+                     * @param {google.spanner.v1.ITransactionOptions=} [properties] Properties to set
+                     * @returns {google.spanner.v1.TransactionOptions} TransactionOptions instance
                      */
-                    KeyRange.create = function create(properties) {
-                        return new KeyRange(properties);
+                    TransactionOptions.create = function create(properties) {
+                        return new TransactionOptions(properties);
                     };
     
                     /**
-                     * Encodes the specified KeyRange message. Does not implicitly {@link google.spanner.v1.KeyRange.verify|verify} messages.
+                     * Encodes the specified TransactionOptions message. Does not implicitly {@link google.spanner.v1.TransactionOptions.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
-                     * @param {google.spanner.v1.IKeyRange} message KeyRange message or plain object to encode
+                     * @param {google.spanner.v1.ITransactionOptions} message TransactionOptions message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    KeyRange.encode = function encode(message, writer) {
+                    TransactionOptions.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.startClosed != null && Object.hasOwnProperty.call(message, "startClosed"))
-                            $root.google.protobuf.ListValue.encode(message.startClosed, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.startOpen != null && Object.hasOwnProperty.call(message, "startOpen"))
-                            $root.google.protobuf.ListValue.encode(message.startOpen, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        if (message.endClosed != null && Object.hasOwnProperty.call(message, "endClosed"))
-                            $root.google.protobuf.ListValue.encode(message.endClosed, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
-                        if (message.endOpen != null && Object.hasOwnProperty.call(message, "endOpen"))
-                            $root.google.protobuf.ListValue.encode(message.endOpen, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                        if (message.readWrite != null && Object.hasOwnProperty.call(message, "readWrite"))
+                            $root.google.spanner.v1.TransactionOptions.ReadWrite.encode(message.readWrite, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.readOnly != null && Object.hasOwnProperty.call(message, "readOnly"))
+                            $root.google.spanner.v1.TransactionOptions.ReadOnly.encode(message.readOnly, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.partitionedDml != null && Object.hasOwnProperty.call(message, "partitionedDml"))
+                            $root.google.spanner.v1.TransactionOptions.PartitionedDml.encode(message.partitionedDml, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        if (message.excludeTxnFromChangeStreams != null && Object.hasOwnProperty.call(message, "excludeTxnFromChangeStreams"))
+                            writer.uint32(/* id 5, wireType 0 =*/40).bool(message.excludeTxnFromChangeStreams);
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified KeyRange message, length delimited. Does not implicitly {@link google.spanner.v1.KeyRange.verify|verify} messages.
+                     * Encodes the specified TransactionOptions message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
-                     * @param {google.spanner.v1.IKeyRange} message KeyRange message or plain object to encode
+                     * @param {google.spanner.v1.ITransactionOptions} message TransactionOptions message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    KeyRange.encodeDelimited = function encodeDelimited(message, writer) {
+                    TransactionOptions.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a KeyRange message from the specified reader or buffer.
+                     * Decodes a TransactionOptions message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.KeyRange} KeyRange
+                     * @returns {google.spanner.v1.TransactionOptions} TransactionOptions
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    KeyRange.decode = function decode(reader, length) {
+                    TransactionOptions.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.KeyRange();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionOptions();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    message.startClosed = $root.google.protobuf.ListValue.decode(reader, reader.uint32());
+                                    message.readWrite = $root.google.spanner.v1.TransactionOptions.ReadWrite.decode(reader, reader.uint32());
                                     break;
                                 }
-                            case 2: {
-                                    message.startOpen = $root.google.protobuf.ListValue.decode(reader, reader.uint32());
+                            case 3: {
+                                    message.partitionedDml = $root.google.spanner.v1.TransactionOptions.PartitionedDml.decode(reader, reader.uint32());
                                     break;
                                 }
-                            case 3: {
-                                    message.endClosed = $root.google.protobuf.ListValue.decode(reader, reader.uint32());
+                            case 2: {
+                                    message.readOnly = $root.google.spanner.v1.TransactionOptions.ReadOnly.decode(reader, reader.uint32());
                                     break;
                                 }
-                            case 4: {
-                                    message.endOpen = $root.google.protobuf.ListValue.decode(reader, reader.uint32());
+                            case 5: {
+                                    message.excludeTxnFromChangeStreams = reader.bool();
                                     break;
                                 }
                             default:
@@ -80149,851 +81389,634 @@
                     };
     
                     /**
-                     * Decodes a KeyRange message from the specified reader or buffer, length delimited.
+                     * Decodes a TransactionOptions message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.KeyRange} KeyRange
+                     * @returns {google.spanner.v1.TransactionOptions} TransactionOptions
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    KeyRange.decodeDelimited = function decodeDelimited(reader) {
+                    TransactionOptions.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a KeyRange message.
+                     * Verifies a TransactionOptions message.
                      * @function verify
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    KeyRange.verify = function verify(message) {
+                    TransactionOptions.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
                         var properties = {};
-                        if (message.startClosed != null && message.hasOwnProperty("startClosed")) {
-                            properties.startKeyType = 1;
-                            {
-                                var error = $root.google.protobuf.ListValue.verify(message.startClosed);
-                                if (error)
-                                    return "startClosed." + error;
-                            }
-                        }
-                        if (message.startOpen != null && message.hasOwnProperty("startOpen")) {
-                            if (properties.startKeyType === 1)
-                                return "startKeyType: multiple values";
-                            properties.startKeyType = 1;
+                        if (message.readWrite != null && message.hasOwnProperty("readWrite")) {
+                            properties.mode = 1;
                             {
-                                var error = $root.google.protobuf.ListValue.verify(message.startOpen);
+                                var error = $root.google.spanner.v1.TransactionOptions.ReadWrite.verify(message.readWrite);
                                 if (error)
-                                    return "startOpen." + error;
+                                    return "readWrite." + error;
                             }
                         }
-                        if (message.endClosed != null && message.hasOwnProperty("endClosed")) {
-                            properties.endKeyType = 1;
+                        if (message.partitionedDml != null && message.hasOwnProperty("partitionedDml")) {
+                            if (properties.mode === 1)
+                                return "mode: multiple values";
+                            properties.mode = 1;
                             {
-                                var error = $root.google.protobuf.ListValue.verify(message.endClosed);
+                                var error = $root.google.spanner.v1.TransactionOptions.PartitionedDml.verify(message.partitionedDml);
                                 if (error)
-                                    return "endClosed." + error;
+                                    return "partitionedDml." + error;
                             }
                         }
-                        if (message.endOpen != null && message.hasOwnProperty("endOpen")) {
-                            if (properties.endKeyType === 1)
-                                return "endKeyType: multiple values";
-                            properties.endKeyType = 1;
+                        if (message.readOnly != null && message.hasOwnProperty("readOnly")) {
+                            if (properties.mode === 1)
+                                return "mode: multiple values";
+                            properties.mode = 1;
                             {
-                                var error = $root.google.protobuf.ListValue.verify(message.endOpen);
+                                var error = $root.google.spanner.v1.TransactionOptions.ReadOnly.verify(message.readOnly);
                                 if (error)
-                                    return "endOpen." + error;
+                                    return "readOnly." + error;
                             }
                         }
+                        if (message.excludeTxnFromChangeStreams != null && message.hasOwnProperty("excludeTxnFromChangeStreams"))
+                            if (typeof message.excludeTxnFromChangeStreams !== "boolean")
+                                return "excludeTxnFromChangeStreams: boolean expected";
                         return null;
                     };
     
                     /**
-                     * Creates a KeyRange message from a plain object. Also converts values to their respective internal types.
+                     * Creates a TransactionOptions message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.KeyRange} KeyRange
+                     * @returns {google.spanner.v1.TransactionOptions} TransactionOptions
                      */
-                    KeyRange.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.KeyRange)
+                    TransactionOptions.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.TransactionOptions)
                             return object;
-                        var message = new $root.google.spanner.v1.KeyRange();
-                        if (object.startClosed != null) {
-                            if (typeof object.startClosed !== "object")
-                                throw TypeError(".google.spanner.v1.KeyRange.startClosed: object expected");
-                            message.startClosed = $root.google.protobuf.ListValue.fromObject(object.startClosed);
-                        }
-                        if (object.startOpen != null) {
-                            if (typeof object.startOpen !== "object")
-                                throw TypeError(".google.spanner.v1.KeyRange.startOpen: object expected");
-                            message.startOpen = $root.google.protobuf.ListValue.fromObject(object.startOpen);
+                        var message = new $root.google.spanner.v1.TransactionOptions();
+                        if (object.readWrite != null) {
+                            if (typeof object.readWrite !== "object")
+                                throw TypeError(".google.spanner.v1.TransactionOptions.readWrite: object expected");
+                            message.readWrite = $root.google.spanner.v1.TransactionOptions.ReadWrite.fromObject(object.readWrite);
                         }
-                        if (object.endClosed != null) {
-                            if (typeof object.endClosed !== "object")
-                                throw TypeError(".google.spanner.v1.KeyRange.endClosed: object expected");
-                            message.endClosed = $root.google.protobuf.ListValue.fromObject(object.endClosed);
+                        if (object.partitionedDml != null) {
+                            if (typeof object.partitionedDml !== "object")
+                                throw TypeError(".google.spanner.v1.TransactionOptions.partitionedDml: object expected");
+                            message.partitionedDml = $root.google.spanner.v1.TransactionOptions.PartitionedDml.fromObject(object.partitionedDml);
                         }
-                        if (object.endOpen != null) {
-                            if (typeof object.endOpen !== "object")
-                                throw TypeError(".google.spanner.v1.KeyRange.endOpen: object expected");
-                            message.endOpen = $root.google.protobuf.ListValue.fromObject(object.endOpen);
+                        if (object.readOnly != null) {
+                            if (typeof object.readOnly !== "object")
+                                throw TypeError(".google.spanner.v1.TransactionOptions.readOnly: object expected");
+                            message.readOnly = $root.google.spanner.v1.TransactionOptions.ReadOnly.fromObject(object.readOnly);
                         }
+                        if (object.excludeTxnFromChangeStreams != null)
+                            message.excludeTxnFromChangeStreams = Boolean(object.excludeTxnFromChangeStreams);
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a KeyRange message. Also converts values to other types if specified.
+                     * Creates a plain object from a TransactionOptions message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
-                     * @param {google.spanner.v1.KeyRange} message KeyRange
+                     * @param {google.spanner.v1.TransactionOptions} message TransactionOptions
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    KeyRange.toObject = function toObject(message, options) {
+                    TransactionOptions.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
-                        if (message.startClosed != null && message.hasOwnProperty("startClosed")) {
-                            object.startClosed = $root.google.protobuf.ListValue.toObject(message.startClosed, options);
-                            if (options.oneofs)
-                                object.startKeyType = "startClosed";
-                        }
-                        if (message.startOpen != null && message.hasOwnProperty("startOpen")) {
-                            object.startOpen = $root.google.protobuf.ListValue.toObject(message.startOpen, options);
+                        if (options.defaults)
+                            object.excludeTxnFromChangeStreams = false;
+                        if (message.readWrite != null && message.hasOwnProperty("readWrite")) {
+                            object.readWrite = $root.google.spanner.v1.TransactionOptions.ReadWrite.toObject(message.readWrite, options);
                             if (options.oneofs)
-                                object.startKeyType = "startOpen";
+                                object.mode = "readWrite";
                         }
-                        if (message.endClosed != null && message.hasOwnProperty("endClosed")) {
-                            object.endClosed = $root.google.protobuf.ListValue.toObject(message.endClosed, options);
+                        if (message.readOnly != null && message.hasOwnProperty("readOnly")) {
+                            object.readOnly = $root.google.spanner.v1.TransactionOptions.ReadOnly.toObject(message.readOnly, options);
                             if (options.oneofs)
-                                object.endKeyType = "endClosed";
+                                object.mode = "readOnly";
                         }
-                        if (message.endOpen != null && message.hasOwnProperty("endOpen")) {
-                            object.endOpen = $root.google.protobuf.ListValue.toObject(message.endOpen, options);
+                        if (message.partitionedDml != null && message.hasOwnProperty("partitionedDml")) {
+                            object.partitionedDml = $root.google.spanner.v1.TransactionOptions.PartitionedDml.toObject(message.partitionedDml, options);
                             if (options.oneofs)
-                                object.endKeyType = "endOpen";
+                                object.mode = "partitionedDml";
                         }
+                        if (message.excludeTxnFromChangeStreams != null && message.hasOwnProperty("excludeTxnFromChangeStreams"))
+                            object.excludeTxnFromChangeStreams = message.excludeTxnFromChangeStreams;
                         return object;
                     };
     
                     /**
-                     * Converts this KeyRange to JSON.
+                     * Converts this TransactionOptions to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    KeyRange.prototype.toJSON = function toJSON() {
+                    TransactionOptions.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for KeyRange
+                     * Gets the default type url for TransactionOptions
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.KeyRange
+                     * @memberof google.spanner.v1.TransactionOptions
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    KeyRange.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    TransactionOptions.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.KeyRange";
+                        return typeUrlPrefix + "/google.spanner.v1.TransactionOptions";
                     };
     
-                    return KeyRange;
-                })();
-    
-                v1.KeySet = (function() {
-    
-                    /**
-                     * Properties of a KeySet.
-                     * @memberof google.spanner.v1
-                     * @interface IKeySet
-                     * @property {Array.<google.protobuf.IListValue>|null} [keys] KeySet keys
-                     * @property {Array.<google.spanner.v1.IKeyRange>|null} [ranges] KeySet ranges
-                     * @property {boolean|null} [all] KeySet all
-                     */
+                    TransactionOptions.ReadWrite = (function() {
     
-                    /**
-                     * Constructs a new KeySet.
-                     * @memberof google.spanner.v1
-                     * @classdesc Represents a KeySet.
-                     * @implements IKeySet
-                     * @constructor
-                     * @param {google.spanner.v1.IKeySet=} [properties] Properties to set
-                     */
-                    function KeySet(properties) {
-                        this.keys = [];
-                        this.ranges = [];
-                        if (properties)
-                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                if (properties[keys[i]] != null)
-                                    this[keys[i]] = properties[keys[i]];
-                    }
+                        /**
+                         * Properties of a ReadWrite.
+                         * @memberof google.spanner.v1.TransactionOptions
+                         * @interface IReadWrite
+                         * @property {google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode|null} [readLockMode] ReadWrite readLockMode
+                         * @property {Uint8Array|null} [multiplexedSessionPreviousTransactionId] ReadWrite multiplexedSessionPreviousTransactionId
+                         */
     
-                    /**
-                     * KeySet keys.
-                     * @member {Array.<google.protobuf.IListValue>} keys
-                     * @memberof google.spanner.v1.KeySet
-                     * @instance
-                     */
-                    KeySet.prototype.keys = $util.emptyArray;
+                        /**
+                         * Constructs a new ReadWrite.
+                         * @memberof google.spanner.v1.TransactionOptions
+                         * @classdesc Represents a ReadWrite.
+                         * @implements IReadWrite
+                         * @constructor
+                         * @param {google.spanner.v1.TransactionOptions.IReadWrite=} [properties] Properties to set
+                         */
+                        function ReadWrite(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
     
-                    /**
-                     * KeySet ranges.
-                     * @member {Array.<google.spanner.v1.IKeyRange>} ranges
-                     * @memberof google.spanner.v1.KeySet
-                     * @instance
-                     */
-                    KeySet.prototype.ranges = $util.emptyArray;
+                        /**
+                         * ReadWrite readLockMode.
+                         * @member {google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode} readLockMode
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @instance
+                         */
+                        ReadWrite.prototype.readLockMode = 0;
     
-                    /**
-                     * KeySet all.
-                     * @member {boolean} all
-                     * @memberof google.spanner.v1.KeySet
-                     * @instance
-                     */
-                    KeySet.prototype.all = false;
+                        /**
+                         * ReadWrite multiplexedSessionPreviousTransactionId.
+                         * @member {Uint8Array} multiplexedSessionPreviousTransactionId
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @instance
+                         */
+                        ReadWrite.prototype.multiplexedSessionPreviousTransactionId = $util.newBuffer([]);
     
-                    /**
-                     * Creates a new KeySet instance using the specified properties.
-                     * @function create
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {google.spanner.v1.IKeySet=} [properties] Properties to set
-                     * @returns {google.spanner.v1.KeySet} KeySet instance
-                     */
-                    KeySet.create = function create(properties) {
-                        return new KeySet(properties);
-                    };
+                        /**
+                         * Creates a new ReadWrite instance using the specified properties.
+                         * @function create
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {google.spanner.v1.TransactionOptions.IReadWrite=} [properties] Properties to set
+                         * @returns {google.spanner.v1.TransactionOptions.ReadWrite} ReadWrite instance
+                         */
+                        ReadWrite.create = function create(properties) {
+                            return new ReadWrite(properties);
+                        };
     
-                    /**
-                     * Encodes the specified KeySet message. Does not implicitly {@link google.spanner.v1.KeySet.verify|verify} messages.
-                     * @function encode
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {google.spanner.v1.IKeySet} message KeySet message or plain object to encode
-                     * @param {$protobuf.Writer} [writer] Writer to encode to
-                     * @returns {$protobuf.Writer} Writer
-                     */
-                    KeySet.encode = function encode(message, writer) {
-                        if (!writer)
-                            writer = $Writer.create();
-                        if (message.keys != null && message.keys.length)
-                            for (var i = 0; i < message.keys.length; ++i)
-                                $root.google.protobuf.ListValue.encode(message.keys[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.ranges != null && message.ranges.length)
-                            for (var i = 0; i < message.ranges.length; ++i)
-                                $root.google.spanner.v1.KeyRange.encode(message.ranges[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        if (message.all != null && Object.hasOwnProperty.call(message, "all"))
-                            writer.uint32(/* id 3, wireType 0 =*/24).bool(message.all);
-                        return writer;
-                    };
+                        /**
+                         * Encodes the specified ReadWrite message. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadWrite.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {google.spanner.v1.TransactionOptions.IReadWrite} message ReadWrite message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        ReadWrite.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.readLockMode != null && Object.hasOwnProperty.call(message, "readLockMode"))
+                                writer.uint32(/* id 1, wireType 0 =*/8).int32(message.readLockMode);
+                            if (message.multiplexedSessionPreviousTransactionId != null && Object.hasOwnProperty.call(message, "multiplexedSessionPreviousTransactionId"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).bytes(message.multiplexedSessionPreviousTransactionId);
+                            return writer;
+                        };
     
-                    /**
-                     * Encodes the specified KeySet message, length delimited. Does not implicitly {@link google.spanner.v1.KeySet.verify|verify} messages.
-                     * @function encodeDelimited
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {google.spanner.v1.IKeySet} message KeySet message or plain object to encode
-                     * @param {$protobuf.Writer} [writer] Writer to encode to
-                     * @returns {$protobuf.Writer} Writer
-                     */
-                    KeySet.encodeDelimited = function encodeDelimited(message, writer) {
-                        return this.encode(message, writer).ldelim();
-                    };
+                        /**
+                         * Encodes the specified ReadWrite message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadWrite.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {google.spanner.v1.TransactionOptions.IReadWrite} message ReadWrite message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        ReadWrite.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
     
-                    /**
-                     * Decodes a KeySet message from the specified reader or buffer.
-                     * @function decode
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.KeySet} KeySet
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    KeySet.decode = function decode(reader, length) {
-                        if (!(reader instanceof $Reader))
-                            reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.KeySet();
-                        while (reader.pos < end) {
-                            var tag = reader.uint32();
-                            switch (tag >>> 3) {
-                            case 1: {
-                                    if (!(message.keys && message.keys.length))
-                                        message.keys = [];
-                                    message.keys.push($root.google.protobuf.ListValue.decode(reader, reader.uint32()));
+                        /**
+                         * Decodes a ReadWrite message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.spanner.v1.TransactionOptions.ReadWrite} ReadWrite
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        ReadWrite.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionOptions.ReadWrite();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.readLockMode = reader.int32();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.multiplexedSessionPreviousTransactionId = reader.bytes();
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
                                     break;
                                 }
-                            case 2: {
-                                    if (!(message.ranges && message.ranges.length))
-                                        message.ranges = [];
-                                    message.ranges.push($root.google.spanner.v1.KeyRange.decode(reader, reader.uint32()));
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a ReadWrite message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.spanner.v1.TransactionOptions.ReadWrite} ReadWrite
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        ReadWrite.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a ReadWrite message.
+                         * @function verify
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        ReadWrite.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.readLockMode != null && message.hasOwnProperty("readLockMode"))
+                                switch (message.readLockMode) {
+                                default:
+                                    return "readLockMode: enum value expected";
+                                case 0:
+                                case 1:
+                                case 2:
                                     break;
                                 }
-                            case 3: {
-                                    message.all = reader.bool();
+                            if (message.multiplexedSessionPreviousTransactionId != null && message.hasOwnProperty("multiplexedSessionPreviousTransactionId"))
+                                if (!(message.multiplexedSessionPreviousTransactionId && typeof message.multiplexedSessionPreviousTransactionId.length === "number" || $util.isString(message.multiplexedSessionPreviousTransactionId)))
+                                    return "multiplexedSessionPreviousTransactionId: buffer expected";
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a ReadWrite message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.spanner.v1.TransactionOptions.ReadWrite} ReadWrite
+                         */
+                        ReadWrite.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.spanner.v1.TransactionOptions.ReadWrite)
+                                return object;
+                            var message = new $root.google.spanner.v1.TransactionOptions.ReadWrite();
+                            switch (object.readLockMode) {
+                            default:
+                                if (typeof object.readLockMode === "number") {
+                                    message.readLockMode = object.readLockMode;
                                     break;
                                 }
-                            default:
-                                reader.skipType(tag & 7);
+                                break;
+                            case "READ_LOCK_MODE_UNSPECIFIED":
+                            case 0:
+                                message.readLockMode = 0;
+                                break;
+                            case "PESSIMISTIC":
+                            case 1:
+                                message.readLockMode = 1;
+                                break;
+                            case "OPTIMISTIC":
+                            case 2:
+                                message.readLockMode = 2;
                                 break;
                             }
-                        }
-                        return message;
-                    };
-    
-                    /**
-                     * Decodes a KeySet message from the specified reader or buffer, length delimited.
-                     * @function decodeDelimited
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.KeySet} KeySet
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    KeySet.decodeDelimited = function decodeDelimited(reader) {
-                        if (!(reader instanceof $Reader))
-                            reader = new $Reader(reader);
-                        return this.decode(reader, reader.uint32());
-                    };
+                            if (object.multiplexedSessionPreviousTransactionId != null)
+                                if (typeof object.multiplexedSessionPreviousTransactionId === "string")
+                                    $util.base64.decode(object.multiplexedSessionPreviousTransactionId, message.multiplexedSessionPreviousTransactionId = $util.newBuffer($util.base64.length(object.multiplexedSessionPreviousTransactionId)), 0);
+                                else if (object.multiplexedSessionPreviousTransactionId.length >= 0)
+                                    message.multiplexedSessionPreviousTransactionId = object.multiplexedSessionPreviousTransactionId;
+                            return message;
+                        };
     
-                    /**
-                     * Verifies a KeySet message.
-                     * @function verify
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {Object.<string,*>} message Plain object to verify
-                     * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                     */
-                    KeySet.verify = function verify(message) {
-                        if (typeof message !== "object" || message === null)
-                            return "object expected";
-                        if (message.keys != null && message.hasOwnProperty("keys")) {
-                            if (!Array.isArray(message.keys))
-                                return "keys: array expected";
-                            for (var i = 0; i < message.keys.length; ++i) {
-                                var error = $root.google.protobuf.ListValue.verify(message.keys[i]);
-                                if (error)
-                                    return "keys." + error;
-                            }
-                        }
-                        if (message.ranges != null && message.hasOwnProperty("ranges")) {
-                            if (!Array.isArray(message.ranges))
-                                return "ranges: array expected";
-                            for (var i = 0; i < message.ranges.length; ++i) {
-                                var error = $root.google.spanner.v1.KeyRange.verify(message.ranges[i]);
-                                if (error)
-                                    return "ranges." + error;
+                        /**
+                         * Creates a plain object from a ReadWrite message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {google.spanner.v1.TransactionOptions.ReadWrite} message ReadWrite
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        ReadWrite.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.readLockMode = options.enums === String ? "READ_LOCK_MODE_UNSPECIFIED" : 0;
+                                if (options.bytes === String)
+                                    object.multiplexedSessionPreviousTransactionId = "";
+                                else {
+                                    object.multiplexedSessionPreviousTransactionId = [];
+                                    if (options.bytes !== Array)
+                                        object.multiplexedSessionPreviousTransactionId = $util.newBuffer(object.multiplexedSessionPreviousTransactionId);
+                                }
                             }
-                        }
-                        if (message.all != null && message.hasOwnProperty("all"))
-                            if (typeof message.all !== "boolean")
-                                return "all: boolean expected";
-                        return null;
-                    };
-    
-                    /**
-                     * Creates a KeySet message from a plain object. Also converts values to their respective internal types.
-                     * @function fromObject
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.KeySet} KeySet
-                     */
-                    KeySet.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.KeySet)
+                            if (message.readLockMode != null && message.hasOwnProperty("readLockMode"))
+                                object.readLockMode = options.enums === String ? $root.google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode[message.readLockMode] === undefined ? message.readLockMode : $root.google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode[message.readLockMode] : message.readLockMode;
+                            if (message.multiplexedSessionPreviousTransactionId != null && message.hasOwnProperty("multiplexedSessionPreviousTransactionId"))
+                                object.multiplexedSessionPreviousTransactionId = options.bytes === String ? $util.base64.encode(message.multiplexedSessionPreviousTransactionId, 0, message.multiplexedSessionPreviousTransactionId.length) : options.bytes === Array ? Array.prototype.slice.call(message.multiplexedSessionPreviousTransactionId) : message.multiplexedSessionPreviousTransactionId;
                             return object;
-                        var message = new $root.google.spanner.v1.KeySet();
-                        if (object.keys) {
-                            if (!Array.isArray(object.keys))
-                                throw TypeError(".google.spanner.v1.KeySet.keys: array expected");
-                            message.keys = [];
-                            for (var i = 0; i < object.keys.length; ++i) {
-                                if (typeof object.keys[i] !== "object")
-                                    throw TypeError(".google.spanner.v1.KeySet.keys: object expected");
-                                message.keys[i] = $root.google.protobuf.ListValue.fromObject(object.keys[i]);
-                            }
-                        }
-                        if (object.ranges) {
-                            if (!Array.isArray(object.ranges))
-                                throw TypeError(".google.spanner.v1.KeySet.ranges: array expected");
-                            message.ranges = [];
-                            for (var i = 0; i < object.ranges.length; ++i) {
-                                if (typeof object.ranges[i] !== "object")
-                                    throw TypeError(".google.spanner.v1.KeySet.ranges: object expected");
-                                message.ranges[i] = $root.google.spanner.v1.KeyRange.fromObject(object.ranges[i]);
-                            }
-                        }
-                        if (object.all != null)
-                            message.all = Boolean(object.all);
-                        return message;
-                    };
-    
-                    /**
-                     * Creates a plain object from a KeySet message. Also converts values to other types if specified.
-                     * @function toObject
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {google.spanner.v1.KeySet} message KeySet
-                     * @param {$protobuf.IConversionOptions} [options] Conversion options
-                     * @returns {Object.<string,*>} Plain object
-                     */
-                    KeySet.toObject = function toObject(message, options) {
-                        if (!options)
-                            options = {};
-                        var object = {};
-                        if (options.arrays || options.defaults) {
-                            object.keys = [];
-                            object.ranges = [];
-                        }
-                        if (options.defaults)
-                            object.all = false;
-                        if (message.keys && message.keys.length) {
-                            object.keys = [];
-                            for (var j = 0; j < message.keys.length; ++j)
-                                object.keys[j] = $root.google.protobuf.ListValue.toObject(message.keys[j], options);
-                        }
-                        if (message.ranges && message.ranges.length) {
-                            object.ranges = [];
-                            for (var j = 0; j < message.ranges.length; ++j)
-                                object.ranges[j] = $root.google.spanner.v1.KeyRange.toObject(message.ranges[j], options);
-                        }
-                        if (message.all != null && message.hasOwnProperty("all"))
-                            object.all = message.all;
-                        return object;
-                    };
+                        };
     
-                    /**
-                     * Converts this KeySet to JSON.
-                     * @function toJSON
-                     * @memberof google.spanner.v1.KeySet
-                     * @instance
-                     * @returns {Object.<string,*>} JSON object
-                     */
-                    KeySet.prototype.toJSON = function toJSON() {
-                        return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                    };
+                        /**
+                         * Converts this ReadWrite to JSON.
+                         * @function toJSON
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        ReadWrite.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
     
-                    /**
-                     * Gets the default type url for KeySet
-                     * @function getTypeUrl
-                     * @memberof google.spanner.v1.KeySet
-                     * @static
-                     * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                     * @returns {string} The default type url
-                     */
-                    KeySet.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                        if (typeUrlPrefix === undefined) {
-                            typeUrlPrefix = "type.googleapis.com";
-                        }
-                        return typeUrlPrefix + "/google.spanner.v1.KeySet";
-                    };
+                        /**
+                         * Gets the default type url for ReadWrite
+                         * @function getTypeUrl
+                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        ReadWrite.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.spanner.v1.TransactionOptions.ReadWrite";
+                        };
     
-                    return KeySet;
-                })();
+                        /**
+                         * ReadLockMode enum.
+                         * @name google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode
+                         * @enum {number}
+                         * @property {number} READ_LOCK_MODE_UNSPECIFIED=0 READ_LOCK_MODE_UNSPECIFIED value
+                         * @property {number} PESSIMISTIC=1 PESSIMISTIC value
+                         * @property {number} OPTIMISTIC=2 OPTIMISTIC value
+                         */
+                        ReadWrite.ReadLockMode = (function() {
+                            var valuesById = {}, values = Object.create(valuesById);
+                            values[valuesById[0] = "READ_LOCK_MODE_UNSPECIFIED"] = 0;
+                            values[valuesById[1] = "PESSIMISTIC"] = 1;
+                            values[valuesById[2] = "OPTIMISTIC"] = 2;
+                            return values;
+                        })();
     
-                v1.Mutation = (function() {
+                        return ReadWrite;
+                    })();
     
-                    /**
-                     * Properties of a Mutation.
-                     * @memberof google.spanner.v1
-                     * @interface IMutation
-                     * @property {google.spanner.v1.Mutation.IWrite|null} [insert] Mutation insert
-                     * @property {google.spanner.v1.Mutation.IWrite|null} [update] Mutation update
-                     * @property {google.spanner.v1.Mutation.IWrite|null} [insertOrUpdate] Mutation insertOrUpdate
-                     * @property {google.spanner.v1.Mutation.IWrite|null} [replace] Mutation replace
-                     * @property {google.spanner.v1.Mutation.IDelete|null} ["delete"] Mutation delete
-                     */
+                    TransactionOptions.PartitionedDml = (function() {
     
-                    /**
-                     * Constructs a new Mutation.
-                     * @memberof google.spanner.v1
-                     * @classdesc Represents a Mutation.
-                     * @implements IMutation
-                     * @constructor
-                     * @param {google.spanner.v1.IMutation=} [properties] Properties to set
-                     */
-                    function Mutation(properties) {
-                        if (properties)
-                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                if (properties[keys[i]] != null)
-                                    this[keys[i]] = properties[keys[i]];
-                    }
+                        /**
+                         * Properties of a PartitionedDml.
+                         * @memberof google.spanner.v1.TransactionOptions
+                         * @interface IPartitionedDml
+                         */
     
-                    /**
-                     * Mutation insert.
-                     * @member {google.spanner.v1.Mutation.IWrite|null|undefined} insert
-                     * @memberof google.spanner.v1.Mutation
-                     * @instance
-                     */
-                    Mutation.prototype.insert = null;
+                        /**
+                         * Constructs a new PartitionedDml.
+                         * @memberof google.spanner.v1.TransactionOptions
+                         * @classdesc Represents a PartitionedDml.
+                         * @implements IPartitionedDml
+                         * @constructor
+                         * @param {google.spanner.v1.TransactionOptions.IPartitionedDml=} [properties] Properties to set
+                         */
+                        function PartitionedDml(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
     
-                    /**
-                     * Mutation update.
-                     * @member {google.spanner.v1.Mutation.IWrite|null|undefined} update
-                     * @memberof google.spanner.v1.Mutation
-                     * @instance
-                     */
-                    Mutation.prototype.update = null;
+                        /**
+                         * Creates a new PartitionedDml instance using the specified properties.
+                         * @function create
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {google.spanner.v1.TransactionOptions.IPartitionedDml=} [properties] Properties to set
+                         * @returns {google.spanner.v1.TransactionOptions.PartitionedDml} PartitionedDml instance
+                         */
+                        PartitionedDml.create = function create(properties) {
+                            return new PartitionedDml(properties);
+                        };
     
-                    /**
-                     * Mutation insertOrUpdate.
-                     * @member {google.spanner.v1.Mutation.IWrite|null|undefined} insertOrUpdate
-                     * @memberof google.spanner.v1.Mutation
-                     * @instance
-                     */
-                    Mutation.prototype.insertOrUpdate = null;
+                        /**
+                         * Encodes the specified PartitionedDml message. Does not implicitly {@link google.spanner.v1.TransactionOptions.PartitionedDml.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {google.spanner.v1.TransactionOptions.IPartitionedDml} message PartitionedDml message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        PartitionedDml.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            return writer;
+                        };
     
-                    /**
-                     * Mutation replace.
-                     * @member {google.spanner.v1.Mutation.IWrite|null|undefined} replace
-                     * @memberof google.spanner.v1.Mutation
-                     * @instance
-                     */
-                    Mutation.prototype.replace = null;
+                        /**
+                         * Encodes the specified PartitionedDml message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.PartitionedDml.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {google.spanner.v1.TransactionOptions.IPartitionedDml} message PartitionedDml message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        PartitionedDml.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
     
-                    /**
-                     * Mutation delete.
-                     * @member {google.spanner.v1.Mutation.IDelete|null|undefined} delete
-                     * @memberof google.spanner.v1.Mutation
-                     * @instance
-                     */
-                    Mutation.prototype["delete"] = null;
+                        /**
+                         * Decodes a PartitionedDml message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.spanner.v1.TransactionOptions.PartitionedDml} PartitionedDml
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        PartitionedDml.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionOptions.PartitionedDml();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
     
-                    // OneOf field names bound to virtual getters and setters
-                    var $oneOfFields;
+                        /**
+                         * Decodes a PartitionedDml message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.spanner.v1.TransactionOptions.PartitionedDml} PartitionedDml
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        PartitionedDml.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
     
-                    /**
-                     * Mutation operation.
-                     * @member {"insert"|"update"|"insertOrUpdate"|"replace"|"delete"|undefined} operation
-                     * @memberof google.spanner.v1.Mutation
-                     * @instance
-                     */
-                    Object.defineProperty(Mutation.prototype, "operation", {
-                        get: $util.oneOfGetter($oneOfFields = ["insert", "update", "insertOrUpdate", "replace", "delete"]),
-                        set: $util.oneOfSetter($oneOfFields)
-                    });
+                        /**
+                         * Verifies a PartitionedDml message.
+                         * @function verify
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        PartitionedDml.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            return null;
+                        };
     
-                    /**
-                     * Creates a new Mutation instance using the specified properties.
-                     * @function create
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {google.spanner.v1.IMutation=} [properties] Properties to set
-                     * @returns {google.spanner.v1.Mutation} Mutation instance
-                     */
-                    Mutation.create = function create(properties) {
-                        return new Mutation(properties);
-                    };
-    
-                    /**
-                     * Encodes the specified Mutation message. Does not implicitly {@link google.spanner.v1.Mutation.verify|verify} messages.
-                     * @function encode
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {google.spanner.v1.IMutation} message Mutation message or plain object to encode
-                     * @param {$protobuf.Writer} [writer] Writer to encode to
-                     * @returns {$protobuf.Writer} Writer
-                     */
-                    Mutation.encode = function encode(message, writer) {
-                        if (!writer)
-                            writer = $Writer.create();
-                        if (message.insert != null && Object.hasOwnProperty.call(message, "insert"))
-                            $root.google.spanner.v1.Mutation.Write.encode(message.insert, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.update != null && Object.hasOwnProperty.call(message, "update"))
-                            $root.google.spanner.v1.Mutation.Write.encode(message.update, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        if (message.insertOrUpdate != null && Object.hasOwnProperty.call(message, "insertOrUpdate"))
-                            $root.google.spanner.v1.Mutation.Write.encode(message.insertOrUpdate, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
-                        if (message.replace != null && Object.hasOwnProperty.call(message, "replace"))
-                            $root.google.spanner.v1.Mutation.Write.encode(message.replace, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
-                        if (message["delete"] != null && Object.hasOwnProperty.call(message, "delete"))
-                            $root.google.spanner.v1.Mutation.Delete.encode(message["delete"], writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
-                        return writer;
-                    };
-    
-                    /**
-                     * Encodes the specified Mutation message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.verify|verify} messages.
-                     * @function encodeDelimited
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {google.spanner.v1.IMutation} message Mutation message or plain object to encode
-                     * @param {$protobuf.Writer} [writer] Writer to encode to
-                     * @returns {$protobuf.Writer} Writer
-                     */
-                    Mutation.encodeDelimited = function encodeDelimited(message, writer) {
-                        return this.encode(message, writer).ldelim();
-                    };
+                        /**
+                         * Creates a PartitionedDml message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.spanner.v1.TransactionOptions.PartitionedDml} PartitionedDml
+                         */
+                        PartitionedDml.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.spanner.v1.TransactionOptions.PartitionedDml)
+                                return object;
+                            return new $root.google.spanner.v1.TransactionOptions.PartitionedDml();
+                        };
     
-                    /**
-                     * Decodes a Mutation message from the specified reader or buffer.
-                     * @function decode
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.Mutation} Mutation
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    Mutation.decode = function decode(reader, length) {
-                        if (!(reader instanceof $Reader))
-                            reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.Mutation();
-                        while (reader.pos < end) {
-                            var tag = reader.uint32();
-                            switch (tag >>> 3) {
-                            case 1: {
-                                    message.insert = $root.google.spanner.v1.Mutation.Write.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            case 2: {
-                                    message.update = $root.google.spanner.v1.Mutation.Write.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            case 3: {
-                                    message.insertOrUpdate = $root.google.spanner.v1.Mutation.Write.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            case 4: {
-                                    message.replace = $root.google.spanner.v1.Mutation.Write.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            case 5: {
-                                    message["delete"] = $root.google.spanner.v1.Mutation.Delete.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            default:
-                                reader.skipType(tag & 7);
-                                break;
-                            }
-                        }
-                        return message;
-                    };
+                        /**
+                         * Creates a plain object from a PartitionedDml message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {google.spanner.v1.TransactionOptions.PartitionedDml} message PartitionedDml
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        PartitionedDml.toObject = function toObject() {
+                            return {};
+                        };
     
-                    /**
-                     * Decodes a Mutation message from the specified reader or buffer, length delimited.
-                     * @function decodeDelimited
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.Mutation} Mutation
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    Mutation.decodeDelimited = function decodeDelimited(reader) {
-                        if (!(reader instanceof $Reader))
-                            reader = new $Reader(reader);
-                        return this.decode(reader, reader.uint32());
-                    };
+                        /**
+                         * Converts this PartitionedDml to JSON.
+                         * @function toJSON
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        PartitionedDml.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
     
-                    /**
-                     * Verifies a Mutation message.
-                     * @function verify
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {Object.<string,*>} message Plain object to verify
-                     * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                     */
-                    Mutation.verify = function verify(message) {
-                        if (typeof message !== "object" || message === null)
-                            return "object expected";
-                        var properties = {};
-                        if (message.insert != null && message.hasOwnProperty("insert")) {
-                            properties.operation = 1;
-                            {
-                                var error = $root.google.spanner.v1.Mutation.Write.verify(message.insert);
-                                if (error)
-                                    return "insert." + error;
-                            }
-                        }
-                        if (message.update != null && message.hasOwnProperty("update")) {
-                            if (properties.operation === 1)
-                                return "operation: multiple values";
-                            properties.operation = 1;
-                            {
-                                var error = $root.google.spanner.v1.Mutation.Write.verify(message.update);
-                                if (error)
-                                    return "update." + error;
-                            }
-                        }
-                        if (message.insertOrUpdate != null && message.hasOwnProperty("insertOrUpdate")) {
-                            if (properties.operation === 1)
-                                return "operation: multiple values";
-                            properties.operation = 1;
-                            {
-                                var error = $root.google.spanner.v1.Mutation.Write.verify(message.insertOrUpdate);
-                                if (error)
-                                    return "insertOrUpdate." + error;
-                            }
-                        }
-                        if (message.replace != null && message.hasOwnProperty("replace")) {
-                            if (properties.operation === 1)
-                                return "operation: multiple values";
-                            properties.operation = 1;
-                            {
-                                var error = $root.google.spanner.v1.Mutation.Write.verify(message.replace);
-                                if (error)
-                                    return "replace." + error;
-                            }
-                        }
-                        if (message["delete"] != null && message.hasOwnProperty("delete")) {
-                            if (properties.operation === 1)
-                                return "operation: multiple values";
-                            properties.operation = 1;
-                            {
-                                var error = $root.google.spanner.v1.Mutation.Delete.verify(message["delete"]);
-                                if (error)
-                                    return "delete." + error;
+                        /**
+                         * Gets the default type url for PartitionedDml
+                         * @function getTypeUrl
+                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        PartitionedDml.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
                             }
-                        }
-                        return null;
-                    };
-    
-                    /**
-                     * Creates a Mutation message from a plain object. Also converts values to their respective internal types.
-                     * @function fromObject
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.Mutation} Mutation
-                     */
-                    Mutation.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.Mutation)
-                            return object;
-                        var message = new $root.google.spanner.v1.Mutation();
-                        if (object.insert != null) {
-                            if (typeof object.insert !== "object")
-                                throw TypeError(".google.spanner.v1.Mutation.insert: object expected");
-                            message.insert = $root.google.spanner.v1.Mutation.Write.fromObject(object.insert);
-                        }
-                        if (object.update != null) {
-                            if (typeof object.update !== "object")
-                                throw TypeError(".google.spanner.v1.Mutation.update: object expected");
-                            message.update = $root.google.spanner.v1.Mutation.Write.fromObject(object.update);
-                        }
-                        if (object.insertOrUpdate != null) {
-                            if (typeof object.insertOrUpdate !== "object")
-                                throw TypeError(".google.spanner.v1.Mutation.insertOrUpdate: object expected");
-                            message.insertOrUpdate = $root.google.spanner.v1.Mutation.Write.fromObject(object.insertOrUpdate);
-                        }
-                        if (object.replace != null) {
-                            if (typeof object.replace !== "object")
-                                throw TypeError(".google.spanner.v1.Mutation.replace: object expected");
-                            message.replace = $root.google.spanner.v1.Mutation.Write.fromObject(object.replace);
-                        }
-                        if (object["delete"] != null) {
-                            if (typeof object["delete"] !== "object")
-                                throw TypeError(".google.spanner.v1.Mutation.delete: object expected");
-                            message["delete"] = $root.google.spanner.v1.Mutation.Delete.fromObject(object["delete"]);
-                        }
-                        return message;
-                    };
-    
-                    /**
-                     * Creates a plain object from a Mutation message. Also converts values to other types if specified.
-                     * @function toObject
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {google.spanner.v1.Mutation} message Mutation
-                     * @param {$protobuf.IConversionOptions} [options] Conversion options
-                     * @returns {Object.<string,*>} Plain object
-                     */
-                    Mutation.toObject = function toObject(message, options) {
-                        if (!options)
-                            options = {};
-                        var object = {};
-                        if (message.insert != null && message.hasOwnProperty("insert")) {
-                            object.insert = $root.google.spanner.v1.Mutation.Write.toObject(message.insert, options);
-                            if (options.oneofs)
-                                object.operation = "insert";
-                        }
-                        if (message.update != null && message.hasOwnProperty("update")) {
-                            object.update = $root.google.spanner.v1.Mutation.Write.toObject(message.update, options);
-                            if (options.oneofs)
-                                object.operation = "update";
-                        }
-                        if (message.insertOrUpdate != null && message.hasOwnProperty("insertOrUpdate")) {
-                            object.insertOrUpdate = $root.google.spanner.v1.Mutation.Write.toObject(message.insertOrUpdate, options);
-                            if (options.oneofs)
-                                object.operation = "insertOrUpdate";
-                        }
-                        if (message.replace != null && message.hasOwnProperty("replace")) {
-                            object.replace = $root.google.spanner.v1.Mutation.Write.toObject(message.replace, options);
-                            if (options.oneofs)
-                                object.operation = "replace";
-                        }
-                        if (message["delete"] != null && message.hasOwnProperty("delete")) {
-                            object["delete"] = $root.google.spanner.v1.Mutation.Delete.toObject(message["delete"], options);
-                            if (options.oneofs)
-                                object.operation = "delete";
-                        }
-                        return object;
-                    };
-    
-                    /**
-                     * Converts this Mutation to JSON.
-                     * @function toJSON
-                     * @memberof google.spanner.v1.Mutation
-                     * @instance
-                     * @returns {Object.<string,*>} JSON object
-                     */
-                    Mutation.prototype.toJSON = function toJSON() {
-                        return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                    };
+                            return typeUrlPrefix + "/google.spanner.v1.TransactionOptions.PartitionedDml";
+                        };
     
-                    /**
-                     * Gets the default type url for Mutation
-                     * @function getTypeUrl
-                     * @memberof google.spanner.v1.Mutation
-                     * @static
-                     * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                     * @returns {string} The default type url
-                     */
-                    Mutation.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                        if (typeUrlPrefix === undefined) {
-                            typeUrlPrefix = "type.googleapis.com";
-                        }
-                        return typeUrlPrefix + "/google.spanner.v1.Mutation";
-                    };
+                        return PartitionedDml;
+                    })();
     
-                    Mutation.Write = (function() {
+                    TransactionOptions.ReadOnly = (function() {
     
                         /**
-                         * Properties of a Write.
-                         * @memberof google.spanner.v1.Mutation
-                         * @interface IWrite
-                         * @property {string|null} [table] Write table
-                         * @property {Array.<string>|null} [columns] Write columns
-                         * @property {Array.<google.protobuf.IListValue>|null} [values] Write values
+                         * Properties of a ReadOnly.
+                         * @memberof google.spanner.v1.TransactionOptions
+                         * @interface IReadOnly
+                         * @property {boolean|null} [strong] ReadOnly strong
+                         * @property {google.protobuf.ITimestamp|null} [minReadTimestamp] ReadOnly minReadTimestamp
+                         * @property {google.protobuf.IDuration|null} [maxStaleness] ReadOnly maxStaleness
+                         * @property {google.protobuf.ITimestamp|null} [readTimestamp] ReadOnly readTimestamp
+                         * @property {google.protobuf.IDuration|null} [exactStaleness] ReadOnly exactStaleness
+                         * @property {boolean|null} [returnReadTimestamp] ReadOnly returnReadTimestamp
                          */
     
                         /**
-                         * Constructs a new Write.
-                         * @memberof google.spanner.v1.Mutation
-                         * @classdesc Represents a Write.
-                         * @implements IWrite
+                         * Constructs a new ReadOnly.
+                         * @memberof google.spanner.v1.TransactionOptions
+                         * @classdesc Represents a ReadOnly.
+                         * @implements IReadOnly
                          * @constructor
-                         * @param {google.spanner.v1.Mutation.IWrite=} [properties] Properties to set
+                         * @param {google.spanner.v1.TransactionOptions.IReadOnly=} [properties] Properties to set
                          */
-                        function Write(properties) {
-                            this.columns = [];
-                            this.values = [];
+                        function ReadOnly(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -81001,109 +82024,159 @@
                         }
     
                         /**
-                         * Write table.
-                         * @member {string} table
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * ReadOnly strong.
+                         * @member {boolean|null|undefined} strong
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @instance
                          */
-                        Write.prototype.table = "";
+                        ReadOnly.prototype.strong = null;
     
                         /**
-                         * Write columns.
-                         * @member {Array.<string>} columns
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * ReadOnly minReadTimestamp.
+                         * @member {google.protobuf.ITimestamp|null|undefined} minReadTimestamp
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @instance
                          */
-                        Write.prototype.columns = $util.emptyArray;
+                        ReadOnly.prototype.minReadTimestamp = null;
     
                         /**
-                         * Write values.
-                         * @member {Array.<google.protobuf.IListValue>} values
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * ReadOnly maxStaleness.
+                         * @member {google.protobuf.IDuration|null|undefined} maxStaleness
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @instance
                          */
-                        Write.prototype.values = $util.emptyArray;
+                        ReadOnly.prototype.maxStaleness = null;
     
                         /**
-                         * Creates a new Write instance using the specified properties.
+                         * ReadOnly readTimestamp.
+                         * @member {google.protobuf.ITimestamp|null|undefined} readTimestamp
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @instance
+                         */
+                        ReadOnly.prototype.readTimestamp = null;
+    
+                        /**
+                         * ReadOnly exactStaleness.
+                         * @member {google.protobuf.IDuration|null|undefined} exactStaleness
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @instance
+                         */
+                        ReadOnly.prototype.exactStaleness = null;
+    
+                        /**
+                         * ReadOnly returnReadTimestamp.
+                         * @member {boolean} returnReadTimestamp
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @instance
+                         */
+                        ReadOnly.prototype.returnReadTimestamp = false;
+    
+                        // OneOf field names bound to virtual getters and setters
+                        var $oneOfFields;
+    
+                        /**
+                         * ReadOnly timestampBound.
+                         * @member {"strong"|"minReadTimestamp"|"maxStaleness"|"readTimestamp"|"exactStaleness"|undefined} timestampBound
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @instance
+                         */
+                        Object.defineProperty(ReadOnly.prototype, "timestampBound", {
+                            get: $util.oneOfGetter($oneOfFields = ["strong", "minReadTimestamp", "maxStaleness", "readTimestamp", "exactStaleness"]),
+                            set: $util.oneOfSetter($oneOfFields)
+                        });
+    
+                        /**
+                         * Creates a new ReadOnly instance using the specified properties.
                          * @function create
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
-                         * @param {google.spanner.v1.Mutation.IWrite=} [properties] Properties to set
-                         * @returns {google.spanner.v1.Mutation.Write} Write instance
+                         * @param {google.spanner.v1.TransactionOptions.IReadOnly=} [properties] Properties to set
+                         * @returns {google.spanner.v1.TransactionOptions.ReadOnly} ReadOnly instance
                          */
-                        Write.create = function create(properties) {
-                            return new Write(properties);
+                        ReadOnly.create = function create(properties) {
+                            return new ReadOnly(properties);
                         };
     
                         /**
-                         * Encodes the specified Write message. Does not implicitly {@link google.spanner.v1.Mutation.Write.verify|verify} messages.
+                         * Encodes the specified ReadOnly message. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadOnly.verify|verify} messages.
                          * @function encode
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
-                         * @param {google.spanner.v1.Mutation.IWrite} message Write message or plain object to encode
+                         * @param {google.spanner.v1.TransactionOptions.IReadOnly} message ReadOnly message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        Write.encode = function encode(message, writer) {
+                        ReadOnly.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.table != null && Object.hasOwnProperty.call(message, "table"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.table);
-                            if (message.columns != null && message.columns.length)
-                                for (var i = 0; i < message.columns.length; ++i)
-                                    writer.uint32(/* id 2, wireType 2 =*/18).string(message.columns[i]);
-                            if (message.values != null && message.values.length)
-                                for (var i = 0; i < message.values.length; ++i)
-                                    $root.google.protobuf.ListValue.encode(message.values[i], writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                            if (message.strong != null && Object.hasOwnProperty.call(message, "strong"))
+                                writer.uint32(/* id 1, wireType 0 =*/8).bool(message.strong);
+                            if (message.minReadTimestamp != null && Object.hasOwnProperty.call(message, "minReadTimestamp"))
+                                $root.google.protobuf.Timestamp.encode(message.minReadTimestamp, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            if (message.maxStaleness != null && Object.hasOwnProperty.call(message, "maxStaleness"))
+                                $root.google.protobuf.Duration.encode(message.maxStaleness, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                            if (message.readTimestamp != null && Object.hasOwnProperty.call(message, "readTimestamp"))
+                                $root.google.protobuf.Timestamp.encode(message.readTimestamp, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                            if (message.exactStaleness != null && Object.hasOwnProperty.call(message, "exactStaleness"))
+                                $root.google.protobuf.Duration.encode(message.exactStaleness, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                            if (message.returnReadTimestamp != null && Object.hasOwnProperty.call(message, "returnReadTimestamp"))
+                                writer.uint32(/* id 6, wireType 0 =*/48).bool(message.returnReadTimestamp);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified Write message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.Write.verify|verify} messages.
+                         * Encodes the specified ReadOnly message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadOnly.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
-                         * @param {google.spanner.v1.Mutation.IWrite} message Write message or plain object to encode
+                         * @param {google.spanner.v1.TransactionOptions.IReadOnly} message ReadOnly message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        Write.encodeDelimited = function encodeDelimited(message, writer) {
+                        ReadOnly.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a Write message from the specified reader or buffer.
+                         * Decodes a ReadOnly message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.spanner.v1.Mutation.Write} Write
+                         * @returns {google.spanner.v1.TransactionOptions.ReadOnly} ReadOnly
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        Write.decode = function decode(reader, length) {
+                        ReadOnly.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.Mutation.Write();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionOptions.ReadOnly();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.table = reader.string();
+                                        message.strong = reader.bool();
                                         break;
                                     }
                                 case 2: {
-                                        if (!(message.columns && message.columns.length))
-                                            message.columns = [];
-                                        message.columns.push(reader.string());
+                                        message.minReadTimestamp = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                         break;
                                     }
                                 case 3: {
-                                        if (!(message.values && message.values.length))
-                                            message.values = [];
-                                        message.values.push($root.google.protobuf.ListValue.decode(reader, reader.uint32()));
+                                        message.maxStaleness = $root.google.protobuf.Duration.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 4: {
+                                        message.readTimestamp = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 5: {
+                                        message.exactStaleness = $root.google.protobuf.Duration.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                case 6: {
+                                        message.returnReadTimestamp = reader.bool();
                                         break;
                                     }
                                 default:
@@ -81115,407 +82188,220 @@
                         };
     
                         /**
-                         * Decodes a Write message from the specified reader or buffer, length delimited.
+                         * Decodes a ReadOnly message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.spanner.v1.Mutation.Write} Write
+                         * @returns {google.spanner.v1.TransactionOptions.ReadOnly} ReadOnly
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        Write.decodeDelimited = function decodeDelimited(reader) {
+                        ReadOnly.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a Write message.
+                         * Verifies a ReadOnly message.
                          * @function verify
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        Write.verify = function verify(message) {
+                        ReadOnly.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.table != null && message.hasOwnProperty("table"))
-                                if (!$util.isString(message.table))
-                                    return "table: string expected";
-                            if (message.columns != null && message.hasOwnProperty("columns")) {
-                                if (!Array.isArray(message.columns))
-                                    return "columns: array expected";
-                                for (var i = 0; i < message.columns.length; ++i)
-                                    if (!$util.isString(message.columns[i]))
-                                        return "columns: string[] expected";
+                            var properties = {};
+                            if (message.strong != null && message.hasOwnProperty("strong")) {
+                                properties.timestampBound = 1;
+                                if (typeof message.strong !== "boolean")
+                                    return "strong: boolean expected";
                             }
-                            if (message.values != null && message.hasOwnProperty("values")) {
-                                if (!Array.isArray(message.values))
-                                    return "values: array expected";
-                                for (var i = 0; i < message.values.length; ++i) {
-                                    var error = $root.google.protobuf.ListValue.verify(message.values[i]);
+                            if (message.minReadTimestamp != null && message.hasOwnProperty("minReadTimestamp")) {
+                                if (properties.timestampBound === 1)
+                                    return "timestampBound: multiple values";
+                                properties.timestampBound = 1;
+                                {
+                                    var error = $root.google.protobuf.Timestamp.verify(message.minReadTimestamp);
                                     if (error)
-                                        return "values." + error;
+                                        return "minReadTimestamp." + error;
+                                }
+                            }
+                            if (message.maxStaleness != null && message.hasOwnProperty("maxStaleness")) {
+                                if (properties.timestampBound === 1)
+                                    return "timestampBound: multiple values";
+                                properties.timestampBound = 1;
+                                {
+                                    var error = $root.google.protobuf.Duration.verify(message.maxStaleness);
+                                    if (error)
+                                        return "maxStaleness." + error;
                                 }
                             }
+                            if (message.readTimestamp != null && message.hasOwnProperty("readTimestamp")) {
+                                if (properties.timestampBound === 1)
+                                    return "timestampBound: multiple values";
+                                properties.timestampBound = 1;
+                                {
+                                    var error = $root.google.protobuf.Timestamp.verify(message.readTimestamp);
+                                    if (error)
+                                        return "readTimestamp." + error;
+                                }
+                            }
+                            if (message.exactStaleness != null && message.hasOwnProperty("exactStaleness")) {
+                                if (properties.timestampBound === 1)
+                                    return "timestampBound: multiple values";
+                                properties.timestampBound = 1;
+                                {
+                                    var error = $root.google.protobuf.Duration.verify(message.exactStaleness);
+                                    if (error)
+                                        return "exactStaleness." + error;
+                                }
+                            }
+                            if (message.returnReadTimestamp != null && message.hasOwnProperty("returnReadTimestamp"))
+                                if (typeof message.returnReadTimestamp !== "boolean")
+                                    return "returnReadTimestamp: boolean expected";
                             return null;
                         };
     
                         /**
-                         * Creates a Write message from a plain object. Also converts values to their respective internal types.
+                         * Creates a ReadOnly message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.spanner.v1.Mutation.Write} Write
+                         * @returns {google.spanner.v1.TransactionOptions.ReadOnly} ReadOnly
                          */
-                        Write.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.spanner.v1.Mutation.Write)
+                        ReadOnly.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.spanner.v1.TransactionOptions.ReadOnly)
                                 return object;
-                            var message = new $root.google.spanner.v1.Mutation.Write();
-                            if (object.table != null)
-                                message.table = String(object.table);
-                            if (object.columns) {
-                                if (!Array.isArray(object.columns))
-                                    throw TypeError(".google.spanner.v1.Mutation.Write.columns: array expected");
-                                message.columns = [];
-                                for (var i = 0; i < object.columns.length; ++i)
-                                    message.columns[i] = String(object.columns[i]);
+                            var message = new $root.google.spanner.v1.TransactionOptions.ReadOnly();
+                            if (object.strong != null)
+                                message.strong = Boolean(object.strong);
+                            if (object.minReadTimestamp != null) {
+                                if (typeof object.minReadTimestamp !== "object")
+                                    throw TypeError(".google.spanner.v1.TransactionOptions.ReadOnly.minReadTimestamp: object expected");
+                                message.minReadTimestamp = $root.google.protobuf.Timestamp.fromObject(object.minReadTimestamp);
                             }
-                            if (object.values) {
-                                if (!Array.isArray(object.values))
-                                    throw TypeError(".google.spanner.v1.Mutation.Write.values: array expected");
-                                message.values = [];
-                                for (var i = 0; i < object.values.length; ++i) {
-                                    if (typeof object.values[i] !== "object")
-                                        throw TypeError(".google.spanner.v1.Mutation.Write.values: object expected");
-                                    message.values[i] = $root.google.protobuf.ListValue.fromObject(object.values[i]);
-                                }
+                            if (object.maxStaleness != null) {
+                                if (typeof object.maxStaleness !== "object")
+                                    throw TypeError(".google.spanner.v1.TransactionOptions.ReadOnly.maxStaleness: object expected");
+                                message.maxStaleness = $root.google.protobuf.Duration.fromObject(object.maxStaleness);
+                            }
+                            if (object.readTimestamp != null) {
+                                if (typeof object.readTimestamp !== "object")
+                                    throw TypeError(".google.spanner.v1.TransactionOptions.ReadOnly.readTimestamp: object expected");
+                                message.readTimestamp = $root.google.protobuf.Timestamp.fromObject(object.readTimestamp);
+                            }
+                            if (object.exactStaleness != null) {
+                                if (typeof object.exactStaleness !== "object")
+                                    throw TypeError(".google.spanner.v1.TransactionOptions.ReadOnly.exactStaleness: object expected");
+                                message.exactStaleness = $root.google.protobuf.Duration.fromObject(object.exactStaleness);
                             }
+                            if (object.returnReadTimestamp != null)
+                                message.returnReadTimestamp = Boolean(object.returnReadTimestamp);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a Write message. Also converts values to other types if specified.
+                         * Creates a plain object from a ReadOnly message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.spanner.v1.Mutation.Write
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
-                         * @param {google.spanner.v1.Mutation.Write} message Write
+                         * @param {google.spanner.v1.TransactionOptions.ReadOnly} message ReadOnly
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        Write.toObject = function toObject(message, options) {
+                        ReadOnly.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.arrays || options.defaults) {
-                                object.columns = [];
-                                object.values = [];
-                            }
                             if (options.defaults)
-                                object.table = "";
-                            if (message.table != null && message.hasOwnProperty("table"))
-                                object.table = message.table;
-                            if (message.columns && message.columns.length) {
-                                object.columns = [];
-                                for (var j = 0; j < message.columns.length; ++j)
-                                    object.columns[j] = message.columns[j];
-                            }
-                            if (message.values && message.values.length) {
-                                object.values = [];
-                                for (var j = 0; j < message.values.length; ++j)
-                                    object.values[j] = $root.google.protobuf.ListValue.toObject(message.values[j], options);
-                            }
-                            return object;
-                        };
-    
-                        /**
-                         * Converts this Write to JSON.
-                         * @function toJSON
-                         * @memberof google.spanner.v1.Mutation.Write
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        Write.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
-    
-                        /**
-                         * Gets the default type url for Write
-                         * @function getTypeUrl
-                         * @memberof google.spanner.v1.Mutation.Write
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
-                         */
-                        Write.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
+                                object.returnReadTimestamp = false;
+                            if (message.strong != null && message.hasOwnProperty("strong")) {
+                                object.strong = message.strong;
+                                if (options.oneofs)
+                                    object.timestampBound = "strong";
                             }
-                            return typeUrlPrefix + "/google.spanner.v1.Mutation.Write";
-                        };
-    
-                        return Write;
-                    })();
-    
-                    Mutation.Delete = (function() {
-    
-                        /**
-                         * Properties of a Delete.
-                         * @memberof google.spanner.v1.Mutation
-                         * @interface IDelete
-                         * @property {string|null} [table] Delete table
-                         * @property {google.spanner.v1.IKeySet|null} [keySet] Delete keySet
-                         */
-    
-                        /**
-                         * Constructs a new Delete.
-                         * @memberof google.spanner.v1.Mutation
-                         * @classdesc Represents a Delete.
-                         * @implements IDelete
-                         * @constructor
-                         * @param {google.spanner.v1.Mutation.IDelete=} [properties] Properties to set
-                         */
-                        function Delete(properties) {
-                            if (properties)
-                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                    if (properties[keys[i]] != null)
-                                        this[keys[i]] = properties[keys[i]];
-                        }
-    
-                        /**
-                         * Delete table.
-                         * @member {string} table
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @instance
-                         */
-                        Delete.prototype.table = "";
-    
-                        /**
-                         * Delete keySet.
-                         * @member {google.spanner.v1.IKeySet|null|undefined} keySet
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @instance
-                         */
-                        Delete.prototype.keySet = null;
-    
-                        /**
-                         * Creates a new Delete instance using the specified properties.
-                         * @function create
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @static
-                         * @param {google.spanner.v1.Mutation.IDelete=} [properties] Properties to set
-                         * @returns {google.spanner.v1.Mutation.Delete} Delete instance
-                         */
-                        Delete.create = function create(properties) {
-                            return new Delete(properties);
-                        };
-    
-                        /**
-                         * Encodes the specified Delete message. Does not implicitly {@link google.spanner.v1.Mutation.Delete.verify|verify} messages.
-                         * @function encode
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @static
-                         * @param {google.spanner.v1.Mutation.IDelete} message Delete message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        Delete.encode = function encode(message, writer) {
-                            if (!writer)
-                                writer = $Writer.create();
-                            if (message.table != null && Object.hasOwnProperty.call(message, "table"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.table);
-                            if (message.keySet != null && Object.hasOwnProperty.call(message, "keySet"))
-                                $root.google.spanner.v1.KeySet.encode(message.keySet, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                            return writer;
-                        };
-    
-                        /**
-                         * Encodes the specified Delete message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.Delete.verify|verify} messages.
-                         * @function encodeDelimited
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @static
-                         * @param {google.spanner.v1.Mutation.IDelete} message Delete message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        Delete.encodeDelimited = function encodeDelimited(message, writer) {
-                            return this.encode(message, writer).ldelim();
-                        };
-    
-                        /**
-                         * Decodes a Delete message from the specified reader or buffer.
-                         * @function decode
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @param {number} [length] Message length if known beforehand
-                         * @returns {google.spanner.v1.Mutation.Delete} Delete
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        Delete.decode = function decode(reader, length) {
-                            if (!(reader instanceof $Reader))
-                                reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.Mutation.Delete();
-                            while (reader.pos < end) {
-                                var tag = reader.uint32();
-                                switch (tag >>> 3) {
-                                case 1: {
-                                        message.table = reader.string();
-                                        break;
-                                    }
-                                case 2: {
-                                        message.keySet = $root.google.spanner.v1.KeySet.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                default:
-                                    reader.skipType(tag & 7);
-                                    break;
-                                }
+                            if (message.minReadTimestamp != null && message.hasOwnProperty("minReadTimestamp")) {
+                                object.minReadTimestamp = $root.google.protobuf.Timestamp.toObject(message.minReadTimestamp, options);
+                                if (options.oneofs)
+                                    object.timestampBound = "minReadTimestamp";
                             }
-                            return message;
-                        };
-    
-                        /**
-                         * Decodes a Delete message from the specified reader or buffer, length delimited.
-                         * @function decodeDelimited
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.spanner.v1.Mutation.Delete} Delete
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        Delete.decodeDelimited = function decodeDelimited(reader) {
-                            if (!(reader instanceof $Reader))
-                                reader = new $Reader(reader);
-                            return this.decode(reader, reader.uint32());
-                        };
-    
-                        /**
-                         * Verifies a Delete message.
-                         * @function verify
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @static
-                         * @param {Object.<string,*>} message Plain object to verify
-                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                         */
-                        Delete.verify = function verify(message) {
-                            if (typeof message !== "object" || message === null)
-                                return "object expected";
-                            if (message.table != null && message.hasOwnProperty("table"))
-                                if (!$util.isString(message.table))
-                                    return "table: string expected";
-                            if (message.keySet != null && message.hasOwnProperty("keySet")) {
-                                var error = $root.google.spanner.v1.KeySet.verify(message.keySet);
-                                if (error)
-                                    return "keySet." + error;
+                            if (message.maxStaleness != null && message.hasOwnProperty("maxStaleness")) {
+                                object.maxStaleness = $root.google.protobuf.Duration.toObject(message.maxStaleness, options);
+                                if (options.oneofs)
+                                    object.timestampBound = "maxStaleness";
                             }
-                            return null;
-                        };
-    
-                        /**
-                         * Creates a Delete message from a plain object. Also converts values to their respective internal types.
-                         * @function fromObject
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @static
-                         * @param {Object.<string,*>} object Plain object
-                         * @returns {google.spanner.v1.Mutation.Delete} Delete
-                         */
-                        Delete.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.spanner.v1.Mutation.Delete)
-                                return object;
-                            var message = new $root.google.spanner.v1.Mutation.Delete();
-                            if (object.table != null)
-                                message.table = String(object.table);
-                            if (object.keySet != null) {
-                                if (typeof object.keySet !== "object")
-                                    throw TypeError(".google.spanner.v1.Mutation.Delete.keySet: object expected");
-                                message.keySet = $root.google.spanner.v1.KeySet.fromObject(object.keySet);
+                            if (message.readTimestamp != null && message.hasOwnProperty("readTimestamp")) {
+                                object.readTimestamp = $root.google.protobuf.Timestamp.toObject(message.readTimestamp, options);
+                                if (options.oneofs)
+                                    object.timestampBound = "readTimestamp";
                             }
-                            return message;
-                        };
-    
-                        /**
-                         * Creates a plain object from a Delete message. Also converts values to other types if specified.
-                         * @function toObject
-                         * @memberof google.spanner.v1.Mutation.Delete
-                         * @static
-                         * @param {google.spanner.v1.Mutation.Delete} message Delete
-                         * @param {$protobuf.IConversionOptions} [options] Conversion options
-                         * @returns {Object.<string,*>} Plain object
-                         */
-                        Delete.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.defaults) {
-                                object.table = "";
-                                object.keySet = null;
+                            if (message.exactStaleness != null && message.hasOwnProperty("exactStaleness")) {
+                                object.exactStaleness = $root.google.protobuf.Duration.toObject(message.exactStaleness, options);
+                                if (options.oneofs)
+                                    object.timestampBound = "exactStaleness";
                             }
-                            if (message.table != null && message.hasOwnProperty("table"))
-                                object.table = message.table;
-                            if (message.keySet != null && message.hasOwnProperty("keySet"))
-                                object.keySet = $root.google.spanner.v1.KeySet.toObject(message.keySet, options);
+                            if (message.returnReadTimestamp != null && message.hasOwnProperty("returnReadTimestamp"))
+                                object.returnReadTimestamp = message.returnReadTimestamp;
                             return object;
                         };
     
                         /**
-                         * Converts this Delete to JSON.
+                         * Converts this ReadOnly to JSON.
                          * @function toJSON
-                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        Delete.prototype.toJSON = function toJSON() {
+                        ReadOnly.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for Delete
+                         * Gets the default type url for ReadOnly
                          * @function getTypeUrl
-                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        Delete.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ReadOnly.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.spanner.v1.Mutation.Delete";
+                            return typeUrlPrefix + "/google.spanner.v1.TransactionOptions.ReadOnly";
                         };
     
-                        return Delete;
+                        return ReadOnly;
                     })();
     
-                    return Mutation;
+                    return TransactionOptions;
                 })();
     
-                v1.ResultSet = (function() {
+                v1.Transaction = (function() {
     
                     /**
-                     * Properties of a ResultSet.
+                     * Properties of a Transaction.
                      * @memberof google.spanner.v1
-                     * @interface IResultSet
-                     * @property {google.spanner.v1.IResultSetMetadata|null} [metadata] ResultSet metadata
-                     * @property {Array.<google.protobuf.IListValue>|null} [rows] ResultSet rows
-                     * @property {google.spanner.v1.IResultSetStats|null} [stats] ResultSet stats
+                     * @interface ITransaction
+                     * @property {Uint8Array|null} [id] Transaction id
+                     * @property {google.protobuf.ITimestamp|null} [readTimestamp] Transaction readTimestamp
+                     * @property {google.spanner.v1.IMultiplexedSessionPrecommitToken|null} [precommitToken] Transaction precommitToken
                      */
     
                     /**
-                     * Constructs a new ResultSet.
+                     * Constructs a new Transaction.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a ResultSet.
-                     * @implements IResultSet
+                     * @classdesc Represents a Transaction.
+                     * @implements ITransaction
                      * @constructor
-                     * @param {google.spanner.v1.IResultSet=} [properties] Properties to set
+                     * @param {google.spanner.v1.ITransaction=} [properties] Properties to set
                      */
-                    function ResultSet(properties) {
-                        this.rows = [];
+                    function Transaction(properties) {
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -81523,106 +82409,103 @@
                     }
     
                     /**
-                     * ResultSet metadata.
-                     * @member {google.spanner.v1.IResultSetMetadata|null|undefined} metadata
-                     * @memberof google.spanner.v1.ResultSet
+                     * Transaction id.
+                     * @member {Uint8Array} id
+                     * @memberof google.spanner.v1.Transaction
                      * @instance
                      */
-                    ResultSet.prototype.metadata = null;
+                    Transaction.prototype.id = $util.newBuffer([]);
     
                     /**
-                     * ResultSet rows.
-                     * @member {Array.<google.protobuf.IListValue>} rows
-                     * @memberof google.spanner.v1.ResultSet
+                     * Transaction readTimestamp.
+                     * @member {google.protobuf.ITimestamp|null|undefined} readTimestamp
+                     * @memberof google.spanner.v1.Transaction
                      * @instance
                      */
-                    ResultSet.prototype.rows = $util.emptyArray;
+                    Transaction.prototype.readTimestamp = null;
     
                     /**
-                     * ResultSet stats.
-                     * @member {google.spanner.v1.IResultSetStats|null|undefined} stats
-                     * @memberof google.spanner.v1.ResultSet
+                     * Transaction precommitToken.
+                     * @member {google.spanner.v1.IMultiplexedSessionPrecommitToken|null|undefined} precommitToken
+                     * @memberof google.spanner.v1.Transaction
                      * @instance
                      */
-                    ResultSet.prototype.stats = null;
+                    Transaction.prototype.precommitToken = null;
     
                     /**
-                     * Creates a new ResultSet instance using the specified properties.
+                     * Creates a new Transaction instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
-                     * @param {google.spanner.v1.IResultSet=} [properties] Properties to set
-                     * @returns {google.spanner.v1.ResultSet} ResultSet instance
+                     * @param {google.spanner.v1.ITransaction=} [properties] Properties to set
+                     * @returns {google.spanner.v1.Transaction} Transaction instance
                      */
-                    ResultSet.create = function create(properties) {
-                        return new ResultSet(properties);
+                    Transaction.create = function create(properties) {
+                        return new Transaction(properties);
                     };
     
                     /**
-                     * Encodes the specified ResultSet message. Does not implicitly {@link google.spanner.v1.ResultSet.verify|verify} messages.
+                     * Encodes the specified Transaction message. Does not implicitly {@link google.spanner.v1.Transaction.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
-                     * @param {google.spanner.v1.IResultSet} message ResultSet message or plain object to encode
+                     * @param {google.spanner.v1.ITransaction} message Transaction message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    ResultSet.encode = function encode(message, writer) {
+                    Transaction.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.metadata != null && Object.hasOwnProperty.call(message, "metadata"))
-                            $root.google.spanner.v1.ResultSetMetadata.encode(message.metadata, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.rows != null && message.rows.length)
-                            for (var i = 0; i < message.rows.length; ++i)
-                                $root.google.protobuf.ListValue.encode(message.rows[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        if (message.stats != null && Object.hasOwnProperty.call(message, "stats"))
-                            $root.google.spanner.v1.ResultSetStats.encode(message.stats, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        if (message.id != null && Object.hasOwnProperty.call(message, "id"))
+                            writer.uint32(/* id 1, wireType 2 =*/10).bytes(message.id);
+                        if (message.readTimestamp != null && Object.hasOwnProperty.call(message, "readTimestamp"))
+                            $root.google.protobuf.Timestamp.encode(message.readTimestamp, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.precommitToken != null && Object.hasOwnProperty.call(message, "precommitToken"))
+                            $root.google.spanner.v1.MultiplexedSessionPrecommitToken.encode(message.precommitToken, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified ResultSet message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSet.verify|verify} messages.
+                     * Encodes the specified Transaction message, length delimited. Does not implicitly {@link google.spanner.v1.Transaction.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
-                     * @param {google.spanner.v1.IResultSet} message ResultSet message or plain object to encode
+                     * @param {google.spanner.v1.ITransaction} message Transaction message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    ResultSet.encodeDelimited = function encodeDelimited(message, writer) {
+                    Transaction.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a ResultSet message from the specified reader or buffer.
+                     * Decodes a Transaction message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.ResultSet} ResultSet
+                     * @returns {google.spanner.v1.Transaction} Transaction
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    ResultSet.decode = function decode(reader, length) {
+                    Transaction.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.ResultSet();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.Transaction();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    message.metadata = $root.google.spanner.v1.ResultSetMetadata.decode(reader, reader.uint32());
+                                    message.id = reader.bytes();
                                     break;
                                 }
                             case 2: {
-                                    if (!(message.rows && message.rows.length))
-                                        message.rows = [];
-                                    message.rows.push($root.google.protobuf.ListValue.decode(reader, reader.uint32()));
+                                    message.readTimestamp = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
                                     break;
                                 }
                             case 3: {
-                                    message.stats = $root.google.spanner.v1.ResultSetStats.decode(reader, reader.uint32());
+                                    message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.decode(reader, reader.uint32());
                                     break;
                                 }
                             default:
@@ -81634,172 +82517,160 @@
                     };
     
                     /**
-                     * Decodes a ResultSet message from the specified reader or buffer, length delimited.
+                     * Decodes a Transaction message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.ResultSet} ResultSet
+                     * @returns {google.spanner.v1.Transaction} Transaction
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    ResultSet.decodeDelimited = function decodeDelimited(reader) {
+                    Transaction.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a ResultSet message.
+                     * Verifies a Transaction message.
                      * @function verify
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    ResultSet.verify = function verify(message) {
+                    Transaction.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
-                        if (message.metadata != null && message.hasOwnProperty("metadata")) {
-                            var error = $root.google.spanner.v1.ResultSetMetadata.verify(message.metadata);
+                        if (message.id != null && message.hasOwnProperty("id"))
+                            if (!(message.id && typeof message.id.length === "number" || $util.isString(message.id)))
+                                return "id: buffer expected";
+                        if (message.readTimestamp != null && message.hasOwnProperty("readTimestamp")) {
+                            var error = $root.google.protobuf.Timestamp.verify(message.readTimestamp);
                             if (error)
-                                return "metadata." + error;
-                        }
-                        if (message.rows != null && message.hasOwnProperty("rows")) {
-                            if (!Array.isArray(message.rows))
-                                return "rows: array expected";
-                            for (var i = 0; i < message.rows.length; ++i) {
-                                var error = $root.google.protobuf.ListValue.verify(message.rows[i]);
-                                if (error)
-                                    return "rows." + error;
-                            }
+                                return "readTimestamp." + error;
                         }
-                        if (message.stats != null && message.hasOwnProperty("stats")) {
-                            var error = $root.google.spanner.v1.ResultSetStats.verify(message.stats);
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken")) {
+                            var error = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.verify(message.precommitToken);
                             if (error)
-                                return "stats." + error;
+                                return "precommitToken." + error;
                         }
                         return null;
                     };
     
                     /**
-                     * Creates a ResultSet message from a plain object. Also converts values to their respective internal types.
+                     * Creates a Transaction message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.ResultSet} ResultSet
+                     * @returns {google.spanner.v1.Transaction} Transaction
                      */
-                    ResultSet.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.ResultSet)
+                    Transaction.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.Transaction)
                             return object;
-                        var message = new $root.google.spanner.v1.ResultSet();
-                        if (object.metadata != null) {
-                            if (typeof object.metadata !== "object")
-                                throw TypeError(".google.spanner.v1.ResultSet.metadata: object expected");
-                            message.metadata = $root.google.spanner.v1.ResultSetMetadata.fromObject(object.metadata);
-                        }
-                        if (object.rows) {
-                            if (!Array.isArray(object.rows))
-                                throw TypeError(".google.spanner.v1.ResultSet.rows: array expected");
-                            message.rows = [];
-                            for (var i = 0; i < object.rows.length; ++i) {
-                                if (typeof object.rows[i] !== "object")
-                                    throw TypeError(".google.spanner.v1.ResultSet.rows: object expected");
-                                message.rows[i] = $root.google.protobuf.ListValue.fromObject(object.rows[i]);
-                            }
+                        var message = new $root.google.spanner.v1.Transaction();
+                        if (object.id != null)
+                            if (typeof object.id === "string")
+                                $util.base64.decode(object.id, message.id = $util.newBuffer($util.base64.length(object.id)), 0);
+                            else if (object.id.length >= 0)
+                                message.id = object.id;
+                        if (object.readTimestamp != null) {
+                            if (typeof object.readTimestamp !== "object")
+                                throw TypeError(".google.spanner.v1.Transaction.readTimestamp: object expected");
+                            message.readTimestamp = $root.google.protobuf.Timestamp.fromObject(object.readTimestamp);
                         }
-                        if (object.stats != null) {
-                            if (typeof object.stats !== "object")
-                                throw TypeError(".google.spanner.v1.ResultSet.stats: object expected");
-                            message.stats = $root.google.spanner.v1.ResultSetStats.fromObject(object.stats);
+                        if (object.precommitToken != null) {
+                            if (typeof object.precommitToken !== "object")
+                                throw TypeError(".google.spanner.v1.Transaction.precommitToken: object expected");
+                            message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.fromObject(object.precommitToken);
                         }
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a ResultSet message. Also converts values to other types if specified.
+                     * Creates a plain object from a Transaction message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
-                     * @param {google.spanner.v1.ResultSet} message ResultSet
+                     * @param {google.spanner.v1.Transaction} message Transaction
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    ResultSet.toObject = function toObject(message, options) {
+                    Transaction.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
-                        if (options.arrays || options.defaults)
-                            object.rows = [];
                         if (options.defaults) {
-                            object.metadata = null;
-                            object.stats = null;
-                        }
-                        if (message.metadata != null && message.hasOwnProperty("metadata"))
-                            object.metadata = $root.google.spanner.v1.ResultSetMetadata.toObject(message.metadata, options);
-                        if (message.rows && message.rows.length) {
-                            object.rows = [];
-                            for (var j = 0; j < message.rows.length; ++j)
-                                object.rows[j] = $root.google.protobuf.ListValue.toObject(message.rows[j], options);
+                            if (options.bytes === String)
+                                object.id = "";
+                            else {
+                                object.id = [];
+                                if (options.bytes !== Array)
+                                    object.id = $util.newBuffer(object.id);
+                            }
+                            object.readTimestamp = null;
+                            object.precommitToken = null;
                         }
-                        if (message.stats != null && message.hasOwnProperty("stats"))
-                            object.stats = $root.google.spanner.v1.ResultSetStats.toObject(message.stats, options);
+                        if (message.id != null && message.hasOwnProperty("id"))
+                            object.id = options.bytes === String ? $util.base64.encode(message.id, 0, message.id.length) : options.bytes === Array ? Array.prototype.slice.call(message.id) : message.id;
+                        if (message.readTimestamp != null && message.hasOwnProperty("readTimestamp"))
+                            object.readTimestamp = $root.google.protobuf.Timestamp.toObject(message.readTimestamp, options);
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken"))
+                            object.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.toObject(message.precommitToken, options);
                         return object;
                     };
     
                     /**
-                     * Converts this ResultSet to JSON.
+                     * Converts this Transaction to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    ResultSet.prototype.toJSON = function toJSON() {
+                    Transaction.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for ResultSet
+                     * Gets the default type url for Transaction
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.ResultSet
+                     * @memberof google.spanner.v1.Transaction
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    ResultSet.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    Transaction.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.ResultSet";
+                        return typeUrlPrefix + "/google.spanner.v1.Transaction";
                     };
     
-                    return ResultSet;
+                    return Transaction;
                 })();
     
-                v1.PartialResultSet = (function() {
+                v1.TransactionSelector = (function() {
     
                     /**
-                     * Properties of a PartialResultSet.
+                     * Properties of a TransactionSelector.
                      * @memberof google.spanner.v1
-                     * @interface IPartialResultSet
-                     * @property {google.spanner.v1.IResultSetMetadata|null} [metadata] PartialResultSet metadata
-                     * @property {Array.<google.protobuf.IValue>|null} [values] PartialResultSet values
-                     * @property {boolean|null} [chunkedValue] PartialResultSet chunkedValue
-                     * @property {Uint8Array|null} [resumeToken] PartialResultSet resumeToken
-                     * @property {google.spanner.v1.IResultSetStats|null} [stats] PartialResultSet stats
+                     * @interface ITransactionSelector
+                     * @property {google.spanner.v1.ITransactionOptions|null} [singleUse] TransactionSelector singleUse
+                     * @property {Uint8Array|null} [id] TransactionSelector id
+                     * @property {google.spanner.v1.ITransactionOptions|null} [begin] TransactionSelector begin
                      */
     
                     /**
-                     * Constructs a new PartialResultSet.
+                     * Constructs a new TransactionSelector.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a PartialResultSet.
-                     * @implements IPartialResultSet
+                     * @classdesc Represents a TransactionSelector.
+                     * @implements ITransactionSelector
                      * @constructor
-                     * @param {google.spanner.v1.IPartialResultSet=} [properties] Properties to set
+                     * @param {google.spanner.v1.ITransactionSelector=} [properties] Properties to set
                      */
-                    function PartialResultSet(properties) {
-                        this.values = [];
+                    function TransactionSelector(properties) {
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -81807,134 +82678,117 @@
                     }
     
                     /**
-                     * PartialResultSet metadata.
-                     * @member {google.spanner.v1.IResultSetMetadata|null|undefined} metadata
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * TransactionSelector singleUse.
+                     * @member {google.spanner.v1.ITransactionOptions|null|undefined} singleUse
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @instance
                      */
-                    PartialResultSet.prototype.metadata = null;
+                    TransactionSelector.prototype.singleUse = null;
     
                     /**
-                     * PartialResultSet values.
-                     * @member {Array.<google.protobuf.IValue>} values
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * TransactionSelector id.
+                     * @member {Uint8Array|null|undefined} id
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @instance
                      */
-                    PartialResultSet.prototype.values = $util.emptyArray;
+                    TransactionSelector.prototype.id = null;
     
                     /**
-                     * PartialResultSet chunkedValue.
-                     * @member {boolean} chunkedValue
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * TransactionSelector begin.
+                     * @member {google.spanner.v1.ITransactionOptions|null|undefined} begin
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @instance
                      */
-                    PartialResultSet.prototype.chunkedValue = false;
+                    TransactionSelector.prototype.begin = null;
     
-                    /**
-                     * PartialResultSet resumeToken.
-                     * @member {Uint8Array} resumeToken
-                     * @memberof google.spanner.v1.PartialResultSet
-                     * @instance
-                     */
-                    PartialResultSet.prototype.resumeToken = $util.newBuffer([]);
+                    // OneOf field names bound to virtual getters and setters
+                    var $oneOfFields;
     
                     /**
-                     * PartialResultSet stats.
-                     * @member {google.spanner.v1.IResultSetStats|null|undefined} stats
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * TransactionSelector selector.
+                     * @member {"singleUse"|"id"|"begin"|undefined} selector
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @instance
                      */
-                    PartialResultSet.prototype.stats = null;
+                    Object.defineProperty(TransactionSelector.prototype, "selector", {
+                        get: $util.oneOfGetter($oneOfFields = ["singleUse", "id", "begin"]),
+                        set: $util.oneOfSetter($oneOfFields)
+                    });
     
                     /**
-                     * Creates a new PartialResultSet instance using the specified properties.
+                     * Creates a new TransactionSelector instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
-                     * @param {google.spanner.v1.IPartialResultSet=} [properties] Properties to set
-                     * @returns {google.spanner.v1.PartialResultSet} PartialResultSet instance
+                     * @param {google.spanner.v1.ITransactionSelector=} [properties] Properties to set
+                     * @returns {google.spanner.v1.TransactionSelector} TransactionSelector instance
                      */
-                    PartialResultSet.create = function create(properties) {
-                        return new PartialResultSet(properties);
+                    TransactionSelector.create = function create(properties) {
+                        return new TransactionSelector(properties);
                     };
     
                     /**
-                     * Encodes the specified PartialResultSet message. Does not implicitly {@link google.spanner.v1.PartialResultSet.verify|verify} messages.
+                     * Encodes the specified TransactionSelector message. Does not implicitly {@link google.spanner.v1.TransactionSelector.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
-                     * @param {google.spanner.v1.IPartialResultSet} message PartialResultSet message or plain object to encode
+                     * @param {google.spanner.v1.ITransactionSelector} message TransactionSelector message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    PartialResultSet.encode = function encode(message, writer) {
+                    TransactionSelector.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.metadata != null && Object.hasOwnProperty.call(message, "metadata"))
-                            $root.google.spanner.v1.ResultSetMetadata.encode(message.metadata, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.values != null && message.values.length)
-                            for (var i = 0; i < message.values.length; ++i)
-                                $root.google.protobuf.Value.encode(message.values[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        if (message.chunkedValue != null && Object.hasOwnProperty.call(message, "chunkedValue"))
-                            writer.uint32(/* id 3, wireType 0 =*/24).bool(message.chunkedValue);
-                        if (message.resumeToken != null && Object.hasOwnProperty.call(message, "resumeToken"))
-                            writer.uint32(/* id 4, wireType 2 =*/34).bytes(message.resumeToken);
-                        if (message.stats != null && Object.hasOwnProperty.call(message, "stats"))
-                            $root.google.spanner.v1.ResultSetStats.encode(message.stats, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                        if (message.singleUse != null && Object.hasOwnProperty.call(message, "singleUse"))
+                            $root.google.spanner.v1.TransactionOptions.encode(message.singleUse, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.id != null && Object.hasOwnProperty.call(message, "id"))
+                            writer.uint32(/* id 2, wireType 2 =*/18).bytes(message.id);
+                        if (message.begin != null && Object.hasOwnProperty.call(message, "begin"))
+                            $root.google.spanner.v1.TransactionOptions.encode(message.begin, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified PartialResultSet message, length delimited. Does not implicitly {@link google.spanner.v1.PartialResultSet.verify|verify} messages.
+                     * Encodes the specified TransactionSelector message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionSelector.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
-                     * @param {google.spanner.v1.IPartialResultSet} message PartialResultSet message or plain object to encode
+                     * @param {google.spanner.v1.ITransactionSelector} message TransactionSelector message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    PartialResultSet.encodeDelimited = function encodeDelimited(message, writer) {
+                    TransactionSelector.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a PartialResultSet message from the specified reader or buffer.
+                     * Decodes a TransactionSelector message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.PartialResultSet} PartialResultSet
+                     * @returns {google.spanner.v1.TransactionSelector} TransactionSelector
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    PartialResultSet.decode = function decode(reader, length) {
+                    TransactionSelector.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.PartialResultSet();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionSelector();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    message.metadata = $root.google.spanner.v1.ResultSetMetadata.decode(reader, reader.uint32());
+                                    message.singleUse = $root.google.spanner.v1.TransactionOptions.decode(reader, reader.uint32());
                                     break;
                                 }
                             case 2: {
-                                    if (!(message.values && message.values.length))
-                                        message.values = [];
-                                    message.values.push($root.google.protobuf.Value.decode(reader, reader.uint32()));
+                                    message.id = reader.bytes();
                                     break;
                                 }
                             case 3: {
-                                    message.chunkedValue = reader.bool();
-                                    break;
-                                }
-                            case 4: {
-                                    message.resumeToken = reader.bytes();
-                                    break;
-                                }
-                            case 5: {
-                                    message.stats = $root.google.spanner.v1.ResultSetStats.decode(reader, reader.uint32());
+                                    message.begin = $root.google.spanner.v1.TransactionOptions.decode(reader, reader.uint32());
                                     break;
                                 }
                             default:
@@ -81946,194 +82800,170 @@
                     };
     
                     /**
-                     * Decodes a PartialResultSet message from the specified reader or buffer, length delimited.
+                     * Decodes a TransactionSelector message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.PartialResultSet} PartialResultSet
+                     * @returns {google.spanner.v1.TransactionSelector} TransactionSelector
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    PartialResultSet.decodeDelimited = function decodeDelimited(reader) {
+                    TransactionSelector.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a PartialResultSet message.
+                     * Verifies a TransactionSelector message.
                      * @function verify
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    PartialResultSet.verify = function verify(message) {
+                    TransactionSelector.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
-                        if (message.metadata != null && message.hasOwnProperty("metadata")) {
-                            var error = $root.google.spanner.v1.ResultSetMetadata.verify(message.metadata);
-                            if (error)
-                                return "metadata." + error;
-                        }
-                        if (message.values != null && message.hasOwnProperty("values")) {
-                            if (!Array.isArray(message.values))
-                                return "values: array expected";
-                            for (var i = 0; i < message.values.length; ++i) {
-                                var error = $root.google.protobuf.Value.verify(message.values[i]);
+                        var properties = {};
+                        if (message.singleUse != null && message.hasOwnProperty("singleUse")) {
+                            properties.selector = 1;
+                            {
+                                var error = $root.google.spanner.v1.TransactionOptions.verify(message.singleUse);
                                 if (error)
-                                    return "values." + error;
+                                    return "singleUse." + error;
                             }
                         }
-                        if (message.chunkedValue != null && message.hasOwnProperty("chunkedValue"))
-                            if (typeof message.chunkedValue !== "boolean")
-                                return "chunkedValue: boolean expected";
-                        if (message.resumeToken != null && message.hasOwnProperty("resumeToken"))
-                            if (!(message.resumeToken && typeof message.resumeToken.length === "number" || $util.isString(message.resumeToken)))
-                                return "resumeToken: buffer expected";
-                        if (message.stats != null && message.hasOwnProperty("stats")) {
-                            var error = $root.google.spanner.v1.ResultSetStats.verify(message.stats);
-                            if (error)
-                                return "stats." + error;
+                        if (message.id != null && message.hasOwnProperty("id")) {
+                            if (properties.selector === 1)
+                                return "selector: multiple values";
+                            properties.selector = 1;
+                            if (!(message.id && typeof message.id.length === "number" || $util.isString(message.id)))
+                                return "id: buffer expected";
+                        }
+                        if (message.begin != null && message.hasOwnProperty("begin")) {
+                            if (properties.selector === 1)
+                                return "selector: multiple values";
+                            properties.selector = 1;
+                            {
+                                var error = $root.google.spanner.v1.TransactionOptions.verify(message.begin);
+                                if (error)
+                                    return "begin." + error;
+                            }
                         }
                         return null;
                     };
     
                     /**
-                     * Creates a PartialResultSet message from a plain object. Also converts values to their respective internal types.
+                     * Creates a TransactionSelector message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.PartialResultSet} PartialResultSet
+                     * @returns {google.spanner.v1.TransactionSelector} TransactionSelector
                      */
-                    PartialResultSet.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.PartialResultSet)
+                    TransactionSelector.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.TransactionSelector)
                             return object;
-                        var message = new $root.google.spanner.v1.PartialResultSet();
-                        if (object.metadata != null) {
-                            if (typeof object.metadata !== "object")
-                                throw TypeError(".google.spanner.v1.PartialResultSet.metadata: object expected");
-                            message.metadata = $root.google.spanner.v1.ResultSetMetadata.fromObject(object.metadata);
-                        }
-                        if (object.values) {
-                            if (!Array.isArray(object.values))
-                                throw TypeError(".google.spanner.v1.PartialResultSet.values: array expected");
-                            message.values = [];
-                            for (var i = 0; i < object.values.length; ++i) {
-                                if (typeof object.values[i] !== "object")
-                                    throw TypeError(".google.spanner.v1.PartialResultSet.values: object expected");
-                                message.values[i] = $root.google.protobuf.Value.fromObject(object.values[i]);
-                            }
+                        var message = new $root.google.spanner.v1.TransactionSelector();
+                        if (object.singleUse != null) {
+                            if (typeof object.singleUse !== "object")
+                                throw TypeError(".google.spanner.v1.TransactionSelector.singleUse: object expected");
+                            message.singleUse = $root.google.spanner.v1.TransactionOptions.fromObject(object.singleUse);
                         }
-                        if (object.chunkedValue != null)
-                            message.chunkedValue = Boolean(object.chunkedValue);
-                        if (object.resumeToken != null)
-                            if (typeof object.resumeToken === "string")
-                                $util.base64.decode(object.resumeToken, message.resumeToken = $util.newBuffer($util.base64.length(object.resumeToken)), 0);
-                            else if (object.resumeToken.length >= 0)
-                                message.resumeToken = object.resumeToken;
-                        if (object.stats != null) {
-                            if (typeof object.stats !== "object")
-                                throw TypeError(".google.spanner.v1.PartialResultSet.stats: object expected");
-                            message.stats = $root.google.spanner.v1.ResultSetStats.fromObject(object.stats);
+                        if (object.id != null)
+                            if (typeof object.id === "string")
+                                $util.base64.decode(object.id, message.id = $util.newBuffer($util.base64.length(object.id)), 0);
+                            else if (object.id.length >= 0)
+                                message.id = object.id;
+                        if (object.begin != null) {
+                            if (typeof object.begin !== "object")
+                                throw TypeError(".google.spanner.v1.TransactionSelector.begin: object expected");
+                            message.begin = $root.google.spanner.v1.TransactionOptions.fromObject(object.begin);
                         }
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a PartialResultSet message. Also converts values to other types if specified.
+                     * Creates a plain object from a TransactionSelector message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
-                     * @param {google.spanner.v1.PartialResultSet} message PartialResultSet
+                     * @param {google.spanner.v1.TransactionSelector} message TransactionSelector
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    PartialResultSet.toObject = function toObject(message, options) {
+                    TransactionSelector.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
-                        if (options.arrays || options.defaults)
-                            object.values = [];
-                        if (options.defaults) {
-                            object.metadata = null;
-                            object.chunkedValue = false;
-                            if (options.bytes === String)
-                                object.resumeToken = "";
-                            else {
-                                object.resumeToken = [];
-                                if (options.bytes !== Array)
-                                    object.resumeToken = $util.newBuffer(object.resumeToken);
-                            }
-                            object.stats = null;
+                        if (message.singleUse != null && message.hasOwnProperty("singleUse")) {
+                            object.singleUse = $root.google.spanner.v1.TransactionOptions.toObject(message.singleUse, options);
+                            if (options.oneofs)
+                                object.selector = "singleUse";
                         }
-                        if (message.metadata != null && message.hasOwnProperty("metadata"))
-                            object.metadata = $root.google.spanner.v1.ResultSetMetadata.toObject(message.metadata, options);
-                        if (message.values && message.values.length) {
-                            object.values = [];
-                            for (var j = 0; j < message.values.length; ++j)
-                                object.values[j] = $root.google.protobuf.Value.toObject(message.values[j], options);
+                        if (message.id != null && message.hasOwnProperty("id")) {
+                            object.id = options.bytes === String ? $util.base64.encode(message.id, 0, message.id.length) : options.bytes === Array ? Array.prototype.slice.call(message.id) : message.id;
+                            if (options.oneofs)
+                                object.selector = "id";
+                        }
+                        if (message.begin != null && message.hasOwnProperty("begin")) {
+                            object.begin = $root.google.spanner.v1.TransactionOptions.toObject(message.begin, options);
+                            if (options.oneofs)
+                                object.selector = "begin";
                         }
-                        if (message.chunkedValue != null && message.hasOwnProperty("chunkedValue"))
-                            object.chunkedValue = message.chunkedValue;
-                        if (message.resumeToken != null && message.hasOwnProperty("resumeToken"))
-                            object.resumeToken = options.bytes === String ? $util.base64.encode(message.resumeToken, 0, message.resumeToken.length) : options.bytes === Array ? Array.prototype.slice.call(message.resumeToken) : message.resumeToken;
-                        if (message.stats != null && message.hasOwnProperty("stats"))
-                            object.stats = $root.google.spanner.v1.ResultSetStats.toObject(message.stats, options);
                         return object;
                     };
     
                     /**
-                     * Converts this PartialResultSet to JSON.
+                     * Converts this TransactionSelector to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    PartialResultSet.prototype.toJSON = function toJSON() {
+                    TransactionSelector.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for PartialResultSet
+                     * Gets the default type url for TransactionSelector
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.PartialResultSet
+                     * @memberof google.spanner.v1.TransactionSelector
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    PartialResultSet.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    TransactionSelector.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.PartialResultSet";
+                        return typeUrlPrefix + "/google.spanner.v1.TransactionSelector";
                     };
     
-                    return PartialResultSet;
+                    return TransactionSelector;
                 })();
     
-                v1.ResultSetMetadata = (function() {
+                v1.MultiplexedSessionPrecommitToken = (function() {
     
                     /**
-                     * Properties of a ResultSetMetadata.
+                     * Properties of a MultiplexedSessionPrecommitToken.
                      * @memberof google.spanner.v1
-                     * @interface IResultSetMetadata
-                     * @property {google.spanner.v1.IStructType|null} [rowType] ResultSetMetadata rowType
-                     * @property {google.spanner.v1.ITransaction|null} [transaction] ResultSetMetadata transaction
-                     * @property {google.spanner.v1.IStructType|null} [undeclaredParameters] ResultSetMetadata undeclaredParameters
+                     * @interface IMultiplexedSessionPrecommitToken
+                     * @property {Uint8Array|null} [precommitToken] MultiplexedSessionPrecommitToken precommitToken
+                     * @property {number|null} [seqNum] MultiplexedSessionPrecommitToken seqNum
                      */
     
                     /**
-                     * Constructs a new ResultSetMetadata.
+                     * Constructs a new MultiplexedSessionPrecommitToken.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a ResultSetMetadata.
-                     * @implements IResultSetMetadata
+                     * @classdesc Represents a MultiplexedSessionPrecommitToken.
+                     * @implements IMultiplexedSessionPrecommitToken
                      * @constructor
-                     * @param {google.spanner.v1.IResultSetMetadata=} [properties] Properties to set
+                     * @param {google.spanner.v1.IMultiplexedSessionPrecommitToken=} [properties] Properties to set
                      */
-                    function ResultSetMetadata(properties) {
+                    function MultiplexedSessionPrecommitToken(properties) {
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -82141,103 +82971,89 @@
                     }
     
                     /**
-                     * ResultSetMetadata rowType.
-                     * @member {google.spanner.v1.IStructType|null|undefined} rowType
-                     * @memberof google.spanner.v1.ResultSetMetadata
-                     * @instance
-                     */
-                    ResultSetMetadata.prototype.rowType = null;
-    
-                    /**
-                     * ResultSetMetadata transaction.
-                     * @member {google.spanner.v1.ITransaction|null|undefined} transaction
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * MultiplexedSessionPrecommitToken precommitToken.
+                     * @member {Uint8Array} precommitToken
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @instance
                      */
-                    ResultSetMetadata.prototype.transaction = null;
+                    MultiplexedSessionPrecommitToken.prototype.precommitToken = $util.newBuffer([]);
     
                     /**
-                     * ResultSetMetadata undeclaredParameters.
-                     * @member {google.spanner.v1.IStructType|null|undefined} undeclaredParameters
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * MultiplexedSessionPrecommitToken seqNum.
+                     * @member {number} seqNum
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @instance
                      */
-                    ResultSetMetadata.prototype.undeclaredParameters = null;
+                    MultiplexedSessionPrecommitToken.prototype.seqNum = 0;
     
                     /**
-                     * Creates a new ResultSetMetadata instance using the specified properties.
+                     * Creates a new MultiplexedSessionPrecommitToken instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
-                     * @param {google.spanner.v1.IResultSetMetadata=} [properties] Properties to set
-                     * @returns {google.spanner.v1.ResultSetMetadata} ResultSetMetadata instance
+                     * @param {google.spanner.v1.IMultiplexedSessionPrecommitToken=} [properties] Properties to set
+                     * @returns {google.spanner.v1.MultiplexedSessionPrecommitToken} MultiplexedSessionPrecommitToken instance
                      */
-                    ResultSetMetadata.create = function create(properties) {
-                        return new ResultSetMetadata(properties);
+                    MultiplexedSessionPrecommitToken.create = function create(properties) {
+                        return new MultiplexedSessionPrecommitToken(properties);
                     };
     
                     /**
-                     * Encodes the specified ResultSetMetadata message. Does not implicitly {@link google.spanner.v1.ResultSetMetadata.verify|verify} messages.
+                     * Encodes the specified MultiplexedSessionPrecommitToken message. Does not implicitly {@link google.spanner.v1.MultiplexedSessionPrecommitToken.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
-                     * @param {google.spanner.v1.IResultSetMetadata} message ResultSetMetadata message or plain object to encode
+                     * @param {google.spanner.v1.IMultiplexedSessionPrecommitToken} message MultiplexedSessionPrecommitToken message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    ResultSetMetadata.encode = function encode(message, writer) {
+                    MultiplexedSessionPrecommitToken.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.rowType != null && Object.hasOwnProperty.call(message, "rowType"))
-                            $root.google.spanner.v1.StructType.encode(message.rowType, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.transaction != null && Object.hasOwnProperty.call(message, "transaction"))
-                            $root.google.spanner.v1.Transaction.encode(message.transaction, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        if (message.undeclaredParameters != null && Object.hasOwnProperty.call(message, "undeclaredParameters"))
-                            $root.google.spanner.v1.StructType.encode(message.undeclaredParameters, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        if (message.precommitToken != null && Object.hasOwnProperty.call(message, "precommitToken"))
+                            writer.uint32(/* id 1, wireType 2 =*/10).bytes(message.precommitToken);
+                        if (message.seqNum != null && Object.hasOwnProperty.call(message, "seqNum"))
+                            writer.uint32(/* id 2, wireType 0 =*/16).int32(message.seqNum);
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified ResultSetMetadata message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSetMetadata.verify|verify} messages.
+                     * Encodes the specified MultiplexedSessionPrecommitToken message, length delimited. Does not implicitly {@link google.spanner.v1.MultiplexedSessionPrecommitToken.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
-                     * @param {google.spanner.v1.IResultSetMetadata} message ResultSetMetadata message or plain object to encode
+                     * @param {google.spanner.v1.IMultiplexedSessionPrecommitToken} message MultiplexedSessionPrecommitToken message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    ResultSetMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                    MultiplexedSessionPrecommitToken.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a ResultSetMetadata message from the specified reader or buffer.
+                     * Decodes a MultiplexedSessionPrecommitToken message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.ResultSetMetadata} ResultSetMetadata
+                     * @returns {google.spanner.v1.MultiplexedSessionPrecommitToken} MultiplexedSessionPrecommitToken
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    ResultSetMetadata.decode = function decode(reader, length) {
+                    MultiplexedSessionPrecommitToken.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.ResultSetMetadata();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.MultiplexedSessionPrecommitToken();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    message.rowType = $root.google.spanner.v1.StructType.decode(reader, reader.uint32());
+                                    message.precommitToken = reader.bytes();
                                     break;
                                 }
                             case 2: {
-                                    message.transaction = $root.google.spanner.v1.Transaction.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            case 3: {
-                                    message.undeclaredParameters = $root.google.spanner.v1.StructType.decode(reader, reader.uint32());
+                                    message.seqNum = reader.int32();
                                     break;
                                 }
                             default:
@@ -82249,157 +83065,143 @@
                     };
     
                     /**
-                     * Decodes a ResultSetMetadata message from the specified reader or buffer, length delimited.
+                     * Decodes a MultiplexedSessionPrecommitToken message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.ResultSetMetadata} ResultSetMetadata
+                     * @returns {google.spanner.v1.MultiplexedSessionPrecommitToken} MultiplexedSessionPrecommitToken
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    ResultSetMetadata.decodeDelimited = function decodeDelimited(reader) {
+                    MultiplexedSessionPrecommitToken.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a ResultSetMetadata message.
+                     * Verifies a MultiplexedSessionPrecommitToken message.
                      * @function verify
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    ResultSetMetadata.verify = function verify(message) {
+                    MultiplexedSessionPrecommitToken.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
-                        if (message.rowType != null && message.hasOwnProperty("rowType")) {
-                            var error = $root.google.spanner.v1.StructType.verify(message.rowType);
-                            if (error)
-                                return "rowType." + error;
-                        }
-                        if (message.transaction != null && message.hasOwnProperty("transaction")) {
-                            var error = $root.google.spanner.v1.Transaction.verify(message.transaction);
-                            if (error)
-                                return "transaction." + error;
-                        }
-                        if (message.undeclaredParameters != null && message.hasOwnProperty("undeclaredParameters")) {
-                            var error = $root.google.spanner.v1.StructType.verify(message.undeclaredParameters);
-                            if (error)
-                                return "undeclaredParameters." + error;
-                        }
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken"))
+                            if (!(message.precommitToken && typeof message.precommitToken.length === "number" || $util.isString(message.precommitToken)))
+                                return "precommitToken: buffer expected";
+                        if (message.seqNum != null && message.hasOwnProperty("seqNum"))
+                            if (!$util.isInteger(message.seqNum))
+                                return "seqNum: integer expected";
                         return null;
                     };
     
                     /**
-                     * Creates a ResultSetMetadata message from a plain object. Also converts values to their respective internal types.
+                     * Creates a MultiplexedSessionPrecommitToken message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.ResultSetMetadata} ResultSetMetadata
+                     * @returns {google.spanner.v1.MultiplexedSessionPrecommitToken} MultiplexedSessionPrecommitToken
                      */
-                    ResultSetMetadata.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.ResultSetMetadata)
+                    MultiplexedSessionPrecommitToken.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.MultiplexedSessionPrecommitToken)
                             return object;
-                        var message = new $root.google.spanner.v1.ResultSetMetadata();
-                        if (object.rowType != null) {
-                            if (typeof object.rowType !== "object")
-                                throw TypeError(".google.spanner.v1.ResultSetMetadata.rowType: object expected");
-                            message.rowType = $root.google.spanner.v1.StructType.fromObject(object.rowType);
-                        }
-                        if (object.transaction != null) {
-                            if (typeof object.transaction !== "object")
-                                throw TypeError(".google.spanner.v1.ResultSetMetadata.transaction: object expected");
-                            message.transaction = $root.google.spanner.v1.Transaction.fromObject(object.transaction);
-                        }
-                        if (object.undeclaredParameters != null) {
-                            if (typeof object.undeclaredParameters !== "object")
-                                throw TypeError(".google.spanner.v1.ResultSetMetadata.undeclaredParameters: object expected");
-                            message.undeclaredParameters = $root.google.spanner.v1.StructType.fromObject(object.undeclaredParameters);
-                        }
+                        var message = new $root.google.spanner.v1.MultiplexedSessionPrecommitToken();
+                        if (object.precommitToken != null)
+                            if (typeof object.precommitToken === "string")
+                                $util.base64.decode(object.precommitToken, message.precommitToken = $util.newBuffer($util.base64.length(object.precommitToken)), 0);
+                            else if (object.precommitToken.length >= 0)
+                                message.precommitToken = object.precommitToken;
+                        if (object.seqNum != null)
+                            message.seqNum = object.seqNum | 0;
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a ResultSetMetadata message. Also converts values to other types if specified.
+                     * Creates a plain object from a MultiplexedSessionPrecommitToken message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
-                     * @param {google.spanner.v1.ResultSetMetadata} message ResultSetMetadata
+                     * @param {google.spanner.v1.MultiplexedSessionPrecommitToken} message MultiplexedSessionPrecommitToken
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    ResultSetMetadata.toObject = function toObject(message, options) {
+                    MultiplexedSessionPrecommitToken.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
                         if (options.defaults) {
-                            object.rowType = null;
-                            object.transaction = null;
-                            object.undeclaredParameters = null;
+                            if (options.bytes === String)
+                                object.precommitToken = "";
+                            else {
+                                object.precommitToken = [];
+                                if (options.bytes !== Array)
+                                    object.precommitToken = $util.newBuffer(object.precommitToken);
+                            }
+                            object.seqNum = 0;
                         }
-                        if (message.rowType != null && message.hasOwnProperty("rowType"))
-                            object.rowType = $root.google.spanner.v1.StructType.toObject(message.rowType, options);
-                        if (message.transaction != null && message.hasOwnProperty("transaction"))
-                            object.transaction = $root.google.spanner.v1.Transaction.toObject(message.transaction, options);
-                        if (message.undeclaredParameters != null && message.hasOwnProperty("undeclaredParameters"))
-                            object.undeclaredParameters = $root.google.spanner.v1.StructType.toObject(message.undeclaredParameters, options);
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken"))
+                            object.precommitToken = options.bytes === String ? $util.base64.encode(message.precommitToken, 0, message.precommitToken.length) : options.bytes === Array ? Array.prototype.slice.call(message.precommitToken) : message.precommitToken;
+                        if (message.seqNum != null && message.hasOwnProperty("seqNum"))
+                            object.seqNum = message.seqNum;
                         return object;
                     };
     
                     /**
-                     * Converts this ResultSetMetadata to JSON.
+                     * Converts this MultiplexedSessionPrecommitToken to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    ResultSetMetadata.prototype.toJSON = function toJSON() {
+                    MultiplexedSessionPrecommitToken.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for ResultSetMetadata
+                     * Gets the default type url for MultiplexedSessionPrecommitToken
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @memberof google.spanner.v1.MultiplexedSessionPrecommitToken
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    ResultSetMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    MultiplexedSessionPrecommitToken.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.ResultSetMetadata";
+                        return typeUrlPrefix + "/google.spanner.v1.MultiplexedSessionPrecommitToken";
                     };
     
-                    return ResultSetMetadata;
+                    return MultiplexedSessionPrecommitToken;
                 })();
     
-                v1.ResultSetStats = (function() {
+                v1.KeyRange = (function() {
     
                     /**
-                     * Properties of a ResultSetStats.
+                     * Properties of a KeyRange.
                      * @memberof google.spanner.v1
-                     * @interface IResultSetStats
-                     * @property {google.spanner.v1.IQueryPlan|null} [queryPlan] ResultSetStats queryPlan
-                     * @property {google.protobuf.IStruct|null} [queryStats] ResultSetStats queryStats
-                     * @property {number|Long|null} [rowCountExact] ResultSetStats rowCountExact
-                     * @property {number|Long|null} [rowCountLowerBound] ResultSetStats rowCountLowerBound
+                     * @interface IKeyRange
+                     * @property {google.protobuf.IListValue|null} [startClosed] KeyRange startClosed
+                     * @property {google.protobuf.IListValue|null} [startOpen] KeyRange startOpen
+                     * @property {google.protobuf.IListValue|null} [endClosed] KeyRange endClosed
+                     * @property {google.protobuf.IListValue|null} [endOpen] KeyRange endOpen
                      */
     
                     /**
-                     * Constructs a new ResultSetStats.
+                     * Constructs a new KeyRange.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a ResultSetStats.
-                     * @implements IResultSetStats
+                     * @classdesc Represents a KeyRange.
+                     * @implements IKeyRange
                      * @constructor
-                     * @param {google.spanner.v1.IResultSetStats=} [properties] Properties to set
+                     * @param {google.spanner.v1.IKeyRange=} [properties] Properties to set
                      */
-                    function ResultSetStats(properties) {
+                    function KeyRange(properties) {
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -82407,131 +83209,142 @@
                     }
     
                     /**
-                     * ResultSetStats queryPlan.
-                     * @member {google.spanner.v1.IQueryPlan|null|undefined} queryPlan
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * KeyRange startClosed.
+                     * @member {google.protobuf.IListValue|null|undefined} startClosed
+                     * @memberof google.spanner.v1.KeyRange
                      * @instance
                      */
-                    ResultSetStats.prototype.queryPlan = null;
+                    KeyRange.prototype.startClosed = null;
     
                     /**
-                     * ResultSetStats queryStats.
-                     * @member {google.protobuf.IStruct|null|undefined} queryStats
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * KeyRange startOpen.
+                     * @member {google.protobuf.IListValue|null|undefined} startOpen
+                     * @memberof google.spanner.v1.KeyRange
                      * @instance
                      */
-                    ResultSetStats.prototype.queryStats = null;
+                    KeyRange.prototype.startOpen = null;
     
                     /**
-                     * ResultSetStats rowCountExact.
-                     * @member {number|Long|null|undefined} rowCountExact
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * KeyRange endClosed.
+                     * @member {google.protobuf.IListValue|null|undefined} endClosed
+                     * @memberof google.spanner.v1.KeyRange
                      * @instance
                      */
-                    ResultSetStats.prototype.rowCountExact = null;
+                    KeyRange.prototype.endClosed = null;
     
                     /**
-                     * ResultSetStats rowCountLowerBound.
-                     * @member {number|Long|null|undefined} rowCountLowerBound
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * KeyRange endOpen.
+                     * @member {google.protobuf.IListValue|null|undefined} endOpen
+                     * @memberof google.spanner.v1.KeyRange
                      * @instance
                      */
-                    ResultSetStats.prototype.rowCountLowerBound = null;
+                    KeyRange.prototype.endOpen = null;
     
                     // OneOf field names bound to virtual getters and setters
                     var $oneOfFields;
     
                     /**
-                     * ResultSetStats rowCount.
-                     * @member {"rowCountExact"|"rowCountLowerBound"|undefined} rowCount
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * KeyRange startKeyType.
+                     * @member {"startClosed"|"startOpen"|undefined} startKeyType
+                     * @memberof google.spanner.v1.KeyRange
                      * @instance
                      */
-                    Object.defineProperty(ResultSetStats.prototype, "rowCount", {
-                        get: $util.oneOfGetter($oneOfFields = ["rowCountExact", "rowCountLowerBound"]),
+                    Object.defineProperty(KeyRange.prototype, "startKeyType", {
+                        get: $util.oneOfGetter($oneOfFields = ["startClosed", "startOpen"]),
                         set: $util.oneOfSetter($oneOfFields)
                     });
     
                     /**
-                     * Creates a new ResultSetStats instance using the specified properties.
+                     * KeyRange endKeyType.
+                     * @member {"endClosed"|"endOpen"|undefined} endKeyType
+                     * @memberof google.spanner.v1.KeyRange
+                     * @instance
+                     */
+                    Object.defineProperty(KeyRange.prototype, "endKeyType", {
+                        get: $util.oneOfGetter($oneOfFields = ["endClosed", "endOpen"]),
+                        set: $util.oneOfSetter($oneOfFields)
+                    });
+    
+                    /**
+                     * Creates a new KeyRange instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
-                     * @param {google.spanner.v1.IResultSetStats=} [properties] Properties to set
-                     * @returns {google.spanner.v1.ResultSetStats} ResultSetStats instance
+                     * @param {google.spanner.v1.IKeyRange=} [properties] Properties to set
+                     * @returns {google.spanner.v1.KeyRange} KeyRange instance
                      */
-                    ResultSetStats.create = function create(properties) {
-                        return new ResultSetStats(properties);
+                    KeyRange.create = function create(properties) {
+                        return new KeyRange(properties);
                     };
     
                     /**
-                     * Encodes the specified ResultSetStats message. Does not implicitly {@link google.spanner.v1.ResultSetStats.verify|verify} messages.
+                     * Encodes the specified KeyRange message. Does not implicitly {@link google.spanner.v1.KeyRange.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
-                     * @param {google.spanner.v1.IResultSetStats} message ResultSetStats message or plain object to encode
+                     * @param {google.spanner.v1.IKeyRange} message KeyRange message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    ResultSetStats.encode = function encode(message, writer) {
+                    KeyRange.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.queryPlan != null && Object.hasOwnProperty.call(message, "queryPlan"))
-                            $root.google.spanner.v1.QueryPlan.encode(message.queryPlan, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.queryStats != null && Object.hasOwnProperty.call(message, "queryStats"))
-                            $root.google.protobuf.Struct.encode(message.queryStats, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        if (message.rowCountExact != null && Object.hasOwnProperty.call(message, "rowCountExact"))
-                            writer.uint32(/* id 3, wireType 0 =*/24).int64(message.rowCountExact);
-                        if (message.rowCountLowerBound != null && Object.hasOwnProperty.call(message, "rowCountLowerBound"))
-                            writer.uint32(/* id 4, wireType 0 =*/32).int64(message.rowCountLowerBound);
+                        if (message.startClosed != null && Object.hasOwnProperty.call(message, "startClosed"))
+                            $root.google.protobuf.ListValue.encode(message.startClosed, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.startOpen != null && Object.hasOwnProperty.call(message, "startOpen"))
+                            $root.google.protobuf.ListValue.encode(message.startOpen, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.endClosed != null && Object.hasOwnProperty.call(message, "endClosed"))
+                            $root.google.protobuf.ListValue.encode(message.endClosed, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        if (message.endOpen != null && Object.hasOwnProperty.call(message, "endOpen"))
+                            $root.google.protobuf.ListValue.encode(message.endOpen, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified ResultSetStats message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSetStats.verify|verify} messages.
+                     * Encodes the specified KeyRange message, length delimited. Does not implicitly {@link google.spanner.v1.KeyRange.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
-                     * @param {google.spanner.v1.IResultSetStats} message ResultSetStats message or plain object to encode
+                     * @param {google.spanner.v1.IKeyRange} message KeyRange message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    ResultSetStats.encodeDelimited = function encodeDelimited(message, writer) {
+                    KeyRange.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a ResultSetStats message from the specified reader or buffer.
+                     * Decodes a KeyRange message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.ResultSetStats} ResultSetStats
+                     * @returns {google.spanner.v1.KeyRange} KeyRange
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    ResultSetStats.decode = function decode(reader, length) {
+                    KeyRange.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.ResultSetStats();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.KeyRange();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    message.queryPlan = $root.google.spanner.v1.QueryPlan.decode(reader, reader.uint32());
+                                    message.startClosed = $root.google.protobuf.ListValue.decode(reader, reader.uint32());
                                     break;
                                 }
                             case 2: {
-                                    message.queryStats = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                    message.startOpen = $root.google.protobuf.ListValue.decode(reader, reader.uint32());
                                     break;
                                 }
                             case 3: {
-                                    message.rowCountExact = reader.int64();
+                                    message.endClosed = $root.google.protobuf.ListValue.decode(reader, reader.uint32());
                                     break;
                                 }
                             case 4: {
-                                    message.rowCountLowerBound = reader.int64();
+                                    message.endOpen = $root.google.protobuf.ListValue.decode(reader, reader.uint32());
                                     break;
                                 }
                             default:
@@ -82543,195 +83356,194 @@
                     };
     
                     /**
-                     * Decodes a ResultSetStats message from the specified reader or buffer, length delimited.
+                     * Decodes a KeyRange message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.ResultSetStats} ResultSetStats
+                     * @returns {google.spanner.v1.KeyRange} KeyRange
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    ResultSetStats.decodeDelimited = function decodeDelimited(reader) {
+                    KeyRange.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a ResultSetStats message.
+                     * Verifies a KeyRange message.
                      * @function verify
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    ResultSetStats.verify = function verify(message) {
+                    KeyRange.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
                         var properties = {};
-                        if (message.queryPlan != null && message.hasOwnProperty("queryPlan")) {
-                            var error = $root.google.spanner.v1.QueryPlan.verify(message.queryPlan);
-                            if (error)
-                                return "queryPlan." + error;
+                        if (message.startClosed != null && message.hasOwnProperty("startClosed")) {
+                            properties.startKeyType = 1;
+                            {
+                                var error = $root.google.protobuf.ListValue.verify(message.startClosed);
+                                if (error)
+                                    return "startClosed." + error;
+                            }
                         }
-                        if (message.queryStats != null && message.hasOwnProperty("queryStats")) {
-                            var error = $root.google.protobuf.Struct.verify(message.queryStats);
-                            if (error)
-                                return "queryStats." + error;
+                        if (message.startOpen != null && message.hasOwnProperty("startOpen")) {
+                            if (properties.startKeyType === 1)
+                                return "startKeyType: multiple values";
+                            properties.startKeyType = 1;
+                            {
+                                var error = $root.google.protobuf.ListValue.verify(message.startOpen);
+                                if (error)
+                                    return "startOpen." + error;
+                            }
                         }
-                        if (message.rowCountExact != null && message.hasOwnProperty("rowCountExact")) {
-                            properties.rowCount = 1;
-                            if (!$util.isInteger(message.rowCountExact) && !(message.rowCountExact && $util.isInteger(message.rowCountExact.low) && $util.isInteger(message.rowCountExact.high)))
-                                return "rowCountExact: integer|Long expected";
+                        if (message.endClosed != null && message.hasOwnProperty("endClosed")) {
+                            properties.endKeyType = 1;
+                            {
+                                var error = $root.google.protobuf.ListValue.verify(message.endClosed);
+                                if (error)
+                                    return "endClosed." + error;
+                            }
                         }
-                        if (message.rowCountLowerBound != null && message.hasOwnProperty("rowCountLowerBound")) {
-                            if (properties.rowCount === 1)
-                                return "rowCount: multiple values";
-                            properties.rowCount = 1;
-                            if (!$util.isInteger(message.rowCountLowerBound) && !(message.rowCountLowerBound && $util.isInteger(message.rowCountLowerBound.low) && $util.isInteger(message.rowCountLowerBound.high)))
-                                return "rowCountLowerBound: integer|Long expected";
+                        if (message.endOpen != null && message.hasOwnProperty("endOpen")) {
+                            if (properties.endKeyType === 1)
+                                return "endKeyType: multiple values";
+                            properties.endKeyType = 1;
+                            {
+                                var error = $root.google.protobuf.ListValue.verify(message.endOpen);
+                                if (error)
+                                    return "endOpen." + error;
+                            }
                         }
                         return null;
                     };
     
                     /**
-                     * Creates a ResultSetStats message from a plain object. Also converts values to their respective internal types.
+                     * Creates a KeyRange message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.ResultSetStats} ResultSetStats
+                     * @returns {google.spanner.v1.KeyRange} KeyRange
                      */
-                    ResultSetStats.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.ResultSetStats)
+                    KeyRange.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.KeyRange)
                             return object;
-                        var message = new $root.google.spanner.v1.ResultSetStats();
-                        if (object.queryPlan != null) {
-                            if (typeof object.queryPlan !== "object")
-                                throw TypeError(".google.spanner.v1.ResultSetStats.queryPlan: object expected");
-                            message.queryPlan = $root.google.spanner.v1.QueryPlan.fromObject(object.queryPlan);
+                        var message = new $root.google.spanner.v1.KeyRange();
+                        if (object.startClosed != null) {
+                            if (typeof object.startClosed !== "object")
+                                throw TypeError(".google.spanner.v1.KeyRange.startClosed: object expected");
+                            message.startClosed = $root.google.protobuf.ListValue.fromObject(object.startClosed);
                         }
-                        if (object.queryStats != null) {
-                            if (typeof object.queryStats !== "object")
-                                throw TypeError(".google.spanner.v1.ResultSetStats.queryStats: object expected");
-                            message.queryStats = $root.google.protobuf.Struct.fromObject(object.queryStats);
+                        if (object.startOpen != null) {
+                            if (typeof object.startOpen !== "object")
+                                throw TypeError(".google.spanner.v1.KeyRange.startOpen: object expected");
+                            message.startOpen = $root.google.protobuf.ListValue.fromObject(object.startOpen);
+                        }
+                        if (object.endClosed != null) {
+                            if (typeof object.endClosed !== "object")
+                                throw TypeError(".google.spanner.v1.KeyRange.endClosed: object expected");
+                            message.endClosed = $root.google.protobuf.ListValue.fromObject(object.endClosed);
+                        }
+                        if (object.endOpen != null) {
+                            if (typeof object.endOpen !== "object")
+                                throw TypeError(".google.spanner.v1.KeyRange.endOpen: object expected");
+                            message.endOpen = $root.google.protobuf.ListValue.fromObject(object.endOpen);
                         }
-                        if (object.rowCountExact != null)
-                            if ($util.Long)
-                                (message.rowCountExact = $util.Long.fromValue(object.rowCountExact)).unsigned = false;
-                            else if (typeof object.rowCountExact === "string")
-                                message.rowCountExact = parseInt(object.rowCountExact, 10);
-                            else if (typeof object.rowCountExact === "number")
-                                message.rowCountExact = object.rowCountExact;
-                            else if (typeof object.rowCountExact === "object")
-                                message.rowCountExact = new $util.LongBits(object.rowCountExact.low >>> 0, object.rowCountExact.high >>> 0).toNumber();
-                        if (object.rowCountLowerBound != null)
-                            if ($util.Long)
-                                (message.rowCountLowerBound = $util.Long.fromValue(object.rowCountLowerBound)).unsigned = false;
-                            else if (typeof object.rowCountLowerBound === "string")
-                                message.rowCountLowerBound = parseInt(object.rowCountLowerBound, 10);
-                            else if (typeof object.rowCountLowerBound === "number")
-                                message.rowCountLowerBound = object.rowCountLowerBound;
-                            else if (typeof object.rowCountLowerBound === "object")
-                                message.rowCountLowerBound = new $util.LongBits(object.rowCountLowerBound.low >>> 0, object.rowCountLowerBound.high >>> 0).toNumber();
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a ResultSetStats message. Also converts values to other types if specified.
+                     * Creates a plain object from a KeyRange message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
-                     * @param {google.spanner.v1.ResultSetStats} message ResultSetStats
+                     * @param {google.spanner.v1.KeyRange} message KeyRange
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    ResultSetStats.toObject = function toObject(message, options) {
+                    KeyRange.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
-                        if (options.defaults) {
-                            object.queryPlan = null;
-                            object.queryStats = null;
+                        if (message.startClosed != null && message.hasOwnProperty("startClosed")) {
+                            object.startClosed = $root.google.protobuf.ListValue.toObject(message.startClosed, options);
+                            if (options.oneofs)
+                                object.startKeyType = "startClosed";
                         }
-                        if (message.queryPlan != null && message.hasOwnProperty("queryPlan"))
-                            object.queryPlan = $root.google.spanner.v1.QueryPlan.toObject(message.queryPlan, options);
-                        if (message.queryStats != null && message.hasOwnProperty("queryStats"))
-                            object.queryStats = $root.google.protobuf.Struct.toObject(message.queryStats, options);
-                        if (message.rowCountExact != null && message.hasOwnProperty("rowCountExact")) {
-                            if (typeof message.rowCountExact === "number")
-                                object.rowCountExact = options.longs === String ? String(message.rowCountExact) : message.rowCountExact;
-                            else
-                                object.rowCountExact = options.longs === String ? $util.Long.prototype.toString.call(message.rowCountExact) : options.longs === Number ? new $util.LongBits(message.rowCountExact.low >>> 0, message.rowCountExact.high >>> 0).toNumber() : message.rowCountExact;
+                        if (message.startOpen != null && message.hasOwnProperty("startOpen")) {
+                            object.startOpen = $root.google.protobuf.ListValue.toObject(message.startOpen, options);
                             if (options.oneofs)
-                                object.rowCount = "rowCountExact";
+                                object.startKeyType = "startOpen";
                         }
-                        if (message.rowCountLowerBound != null && message.hasOwnProperty("rowCountLowerBound")) {
-                            if (typeof message.rowCountLowerBound === "number")
-                                object.rowCountLowerBound = options.longs === String ? String(message.rowCountLowerBound) : message.rowCountLowerBound;
-                            else
-                                object.rowCountLowerBound = options.longs === String ? $util.Long.prototype.toString.call(message.rowCountLowerBound) : options.longs === Number ? new $util.LongBits(message.rowCountLowerBound.low >>> 0, message.rowCountLowerBound.high >>> 0).toNumber() : message.rowCountLowerBound;
+                        if (message.endClosed != null && message.hasOwnProperty("endClosed")) {
+                            object.endClosed = $root.google.protobuf.ListValue.toObject(message.endClosed, options);
                             if (options.oneofs)
-                                object.rowCount = "rowCountLowerBound";
+                                object.endKeyType = "endClosed";
+                        }
+                        if (message.endOpen != null && message.hasOwnProperty("endOpen")) {
+                            object.endOpen = $root.google.protobuf.ListValue.toObject(message.endOpen, options);
+                            if (options.oneofs)
+                                object.endKeyType = "endOpen";
                         }
                         return object;
                     };
     
                     /**
-                     * Converts this ResultSetStats to JSON.
+                     * Converts this KeyRange to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    ResultSetStats.prototype.toJSON = function toJSON() {
+                    KeyRange.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for ResultSetStats
+                     * Gets the default type url for KeyRange
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.ResultSetStats
+                     * @memberof google.spanner.v1.KeyRange
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    ResultSetStats.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    KeyRange.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.ResultSetStats";
+                        return typeUrlPrefix + "/google.spanner.v1.KeyRange";
                     };
     
-                    return ResultSetStats;
+                    return KeyRange;
                 })();
     
-                v1.PlanNode = (function() {
+                v1.KeySet = (function() {
     
                     /**
-                     * Properties of a PlanNode.
+                     * Properties of a KeySet.
                      * @memberof google.spanner.v1
-                     * @interface IPlanNode
-                     * @property {number|null} [index] PlanNode index
-                     * @property {google.spanner.v1.PlanNode.Kind|null} [kind] PlanNode kind
-                     * @property {string|null} [displayName] PlanNode displayName
-                     * @property {Array.<google.spanner.v1.PlanNode.IChildLink>|null} [childLinks] PlanNode childLinks
-                     * @property {google.spanner.v1.PlanNode.IShortRepresentation|null} [shortRepresentation] PlanNode shortRepresentation
-                     * @property {google.protobuf.IStruct|null} [metadata] PlanNode metadata
-                     * @property {google.protobuf.IStruct|null} [executionStats] PlanNode executionStats
+                     * @interface IKeySet
+                     * @property {Array.<google.protobuf.IListValue>|null} [keys] KeySet keys
+                     * @property {Array.<google.spanner.v1.IKeyRange>|null} [ranges] KeySet ranges
+                     * @property {boolean|null} [all] KeySet all
                      */
     
                     /**
-                     * Constructs a new PlanNode.
+                     * Constructs a new KeySet.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a PlanNode.
-                     * @implements IPlanNode
+                     * @classdesc Represents a KeySet.
+                     * @implements IKeySet
                      * @constructor
-                     * @param {google.spanner.v1.IPlanNode=} [properties] Properties to set
+                     * @param {google.spanner.v1.IKeySet=} [properties] Properties to set
                      */
-                    function PlanNode(properties) {
-                        this.childLinks = [];
+                    function KeySet(properties) {
+                        this.keys = [];
+                        this.ranges = [];
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -82739,162 +83551,109 @@
                     }
     
                     /**
-                     * PlanNode index.
-                     * @member {number} index
-                     * @memberof google.spanner.v1.PlanNode
-                     * @instance
-                     */
-                    PlanNode.prototype.index = 0;
-    
-                    /**
-                     * PlanNode kind.
-                     * @member {google.spanner.v1.PlanNode.Kind} kind
-                     * @memberof google.spanner.v1.PlanNode
-                     * @instance
-                     */
-                    PlanNode.prototype.kind = 0;
-    
-                    /**
-                     * PlanNode displayName.
-                     * @member {string} displayName
-                     * @memberof google.spanner.v1.PlanNode
-                     * @instance
-                     */
-                    PlanNode.prototype.displayName = "";
-    
-                    /**
-                     * PlanNode childLinks.
-                     * @member {Array.<google.spanner.v1.PlanNode.IChildLink>} childLinks
-                     * @memberof google.spanner.v1.PlanNode
-                     * @instance
-                     */
-                    PlanNode.prototype.childLinks = $util.emptyArray;
-    
-                    /**
-                     * PlanNode shortRepresentation.
-                     * @member {google.spanner.v1.PlanNode.IShortRepresentation|null|undefined} shortRepresentation
-                     * @memberof google.spanner.v1.PlanNode
+                     * KeySet keys.
+                     * @member {Array.<google.protobuf.IListValue>} keys
+                     * @memberof google.spanner.v1.KeySet
                      * @instance
                      */
-                    PlanNode.prototype.shortRepresentation = null;
+                    KeySet.prototype.keys = $util.emptyArray;
     
                     /**
-                     * PlanNode metadata.
-                     * @member {google.protobuf.IStruct|null|undefined} metadata
-                     * @memberof google.spanner.v1.PlanNode
+                     * KeySet ranges.
+                     * @member {Array.<google.spanner.v1.IKeyRange>} ranges
+                     * @memberof google.spanner.v1.KeySet
                      * @instance
                      */
-                    PlanNode.prototype.metadata = null;
+                    KeySet.prototype.ranges = $util.emptyArray;
     
                     /**
-                     * PlanNode executionStats.
-                     * @member {google.protobuf.IStruct|null|undefined} executionStats
-                     * @memberof google.spanner.v1.PlanNode
+                     * KeySet all.
+                     * @member {boolean} all
+                     * @memberof google.spanner.v1.KeySet
                      * @instance
                      */
-                    PlanNode.prototype.executionStats = null;
+                    KeySet.prototype.all = false;
     
                     /**
-                     * Creates a new PlanNode instance using the specified properties.
+                     * Creates a new KeySet instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
-                     * @param {google.spanner.v1.IPlanNode=} [properties] Properties to set
-                     * @returns {google.spanner.v1.PlanNode} PlanNode instance
+                     * @param {google.spanner.v1.IKeySet=} [properties] Properties to set
+                     * @returns {google.spanner.v1.KeySet} KeySet instance
                      */
-                    PlanNode.create = function create(properties) {
-                        return new PlanNode(properties);
+                    KeySet.create = function create(properties) {
+                        return new KeySet(properties);
                     };
     
                     /**
-                     * Encodes the specified PlanNode message. Does not implicitly {@link google.spanner.v1.PlanNode.verify|verify} messages.
+                     * Encodes the specified KeySet message. Does not implicitly {@link google.spanner.v1.KeySet.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
-                     * @param {google.spanner.v1.IPlanNode} message PlanNode message or plain object to encode
+                     * @param {google.spanner.v1.IKeySet} message KeySet message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    PlanNode.encode = function encode(message, writer) {
+                    KeySet.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.index != null && Object.hasOwnProperty.call(message, "index"))
-                            writer.uint32(/* id 1, wireType 0 =*/8).int32(message.index);
-                        if (message.kind != null && Object.hasOwnProperty.call(message, "kind"))
-                            writer.uint32(/* id 2, wireType 0 =*/16).int32(message.kind);
-                        if (message.displayName != null && Object.hasOwnProperty.call(message, "displayName"))
-                            writer.uint32(/* id 3, wireType 2 =*/26).string(message.displayName);
-                        if (message.childLinks != null && message.childLinks.length)
-                            for (var i = 0; i < message.childLinks.length; ++i)
-                                $root.google.spanner.v1.PlanNode.ChildLink.encode(message.childLinks[i], writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
-                        if (message.shortRepresentation != null && Object.hasOwnProperty.call(message, "shortRepresentation"))
-                            $root.google.spanner.v1.PlanNode.ShortRepresentation.encode(message.shortRepresentation, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
-                        if (message.metadata != null && Object.hasOwnProperty.call(message, "metadata"))
-                            $root.google.protobuf.Struct.encode(message.metadata, writer.uint32(/* id 6, wireType 2 =*/50).fork()).ldelim();
-                        if (message.executionStats != null && Object.hasOwnProperty.call(message, "executionStats"))
-                            $root.google.protobuf.Struct.encode(message.executionStats, writer.uint32(/* id 7, wireType 2 =*/58).fork()).ldelim();
+                        if (message.keys != null && message.keys.length)
+                            for (var i = 0; i < message.keys.length; ++i)
+                                $root.google.protobuf.ListValue.encode(message.keys[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.ranges != null && message.ranges.length)
+                            for (var i = 0; i < message.ranges.length; ++i)
+                                $root.google.spanner.v1.KeyRange.encode(message.ranges[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.all != null && Object.hasOwnProperty.call(message, "all"))
+                            writer.uint32(/* id 3, wireType 0 =*/24).bool(message.all);
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified PlanNode message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.verify|verify} messages.
+                     * Encodes the specified KeySet message, length delimited. Does not implicitly {@link google.spanner.v1.KeySet.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
-                     * @param {google.spanner.v1.IPlanNode} message PlanNode message or plain object to encode
+                     * @param {google.spanner.v1.IKeySet} message KeySet message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    PlanNode.encodeDelimited = function encodeDelimited(message, writer) {
+                    KeySet.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a PlanNode message from the specified reader or buffer.
+                     * Decodes a KeySet message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.PlanNode} PlanNode
+                     * @returns {google.spanner.v1.KeySet} KeySet
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    PlanNode.decode = function decode(reader, length) {
+                    KeySet.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.PlanNode();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.KeySet();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    message.index = reader.int32();
+                                    if (!(message.keys && message.keys.length))
+                                        message.keys = [];
+                                    message.keys.push($root.google.protobuf.ListValue.decode(reader, reader.uint32()));
                                     break;
                                 }
                             case 2: {
-                                    message.kind = reader.int32();
+                                    if (!(message.ranges && message.ranges.length))
+                                        message.ranges = [];
+                                    message.ranges.push($root.google.spanner.v1.KeyRange.decode(reader, reader.uint32()));
                                     break;
                                 }
                             case 3: {
-                                    message.displayName = reader.string();
-                                    break;
-                                }
-                            case 4: {
-                                    if (!(message.childLinks && message.childLinks.length))
-                                        message.childLinks = [];
-                                    message.childLinks.push($root.google.spanner.v1.PlanNode.ChildLink.decode(reader, reader.uint32()));
-                                    break;
-                                }
-                            case 5: {
-                                    message.shortRepresentation = $root.google.spanner.v1.PlanNode.ShortRepresentation.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            case 6: {
-                                    message.metadata = $root.google.protobuf.Struct.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            case 7: {
-                                    message.executionStats = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                    message.all = reader.bool();
                                     break;
                                 }
                             default:
@@ -82906,493 +83665,542 @@
                     };
     
                     /**
-                     * Decodes a PlanNode message from the specified reader or buffer, length delimited.
+                     * Decodes a KeySet message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.PlanNode} PlanNode
+                     * @returns {google.spanner.v1.KeySet} KeySet
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    PlanNode.decodeDelimited = function decodeDelimited(reader) {
+                    KeySet.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a PlanNode message.
+                     * Verifies a KeySet message.
                      * @function verify
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    PlanNode.verify = function verify(message) {
+                    KeySet.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
-                        if (message.index != null && message.hasOwnProperty("index"))
-                            if (!$util.isInteger(message.index))
-                                return "index: integer expected";
-                        if (message.kind != null && message.hasOwnProperty("kind"))
-                            switch (message.kind) {
-                            default:
-                                return "kind: enum value expected";
-                            case 0:
-                            case 1:
-                            case 2:
-                                break;
-                            }
-                        if (message.displayName != null && message.hasOwnProperty("displayName"))
-                            if (!$util.isString(message.displayName))
-                                return "displayName: string expected";
-                        if (message.childLinks != null && message.hasOwnProperty("childLinks")) {
-                            if (!Array.isArray(message.childLinks))
-                                return "childLinks: array expected";
-                            for (var i = 0; i < message.childLinks.length; ++i) {
-                                var error = $root.google.spanner.v1.PlanNode.ChildLink.verify(message.childLinks[i]);
+                        if (message.keys != null && message.hasOwnProperty("keys")) {
+                            if (!Array.isArray(message.keys))
+                                return "keys: array expected";
+                            for (var i = 0; i < message.keys.length; ++i) {
+                                var error = $root.google.protobuf.ListValue.verify(message.keys[i]);
                                 if (error)
-                                    return "childLinks." + error;
+                                    return "keys." + error;
                             }
                         }
-                        if (message.shortRepresentation != null && message.hasOwnProperty("shortRepresentation")) {
-                            var error = $root.google.spanner.v1.PlanNode.ShortRepresentation.verify(message.shortRepresentation);
-                            if (error)
-                                return "shortRepresentation." + error;
-                        }
-                        if (message.metadata != null && message.hasOwnProperty("metadata")) {
-                            var error = $root.google.protobuf.Struct.verify(message.metadata);
-                            if (error)
-                                return "metadata." + error;
-                        }
-                        if (message.executionStats != null && message.hasOwnProperty("executionStats")) {
-                            var error = $root.google.protobuf.Struct.verify(message.executionStats);
-                            if (error)
-                                return "executionStats." + error;
+                        if (message.ranges != null && message.hasOwnProperty("ranges")) {
+                            if (!Array.isArray(message.ranges))
+                                return "ranges: array expected";
+                            for (var i = 0; i < message.ranges.length; ++i) {
+                                var error = $root.google.spanner.v1.KeyRange.verify(message.ranges[i]);
+                                if (error)
+                                    return "ranges." + error;
+                            }
                         }
+                        if (message.all != null && message.hasOwnProperty("all"))
+                            if (typeof message.all !== "boolean")
+                                return "all: boolean expected";
                         return null;
                     };
     
                     /**
-                     * Creates a PlanNode message from a plain object. Also converts values to their respective internal types.
+                     * Creates a KeySet message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.PlanNode} PlanNode
+                     * @returns {google.spanner.v1.KeySet} KeySet
                      */
-                    PlanNode.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.PlanNode)
+                    KeySet.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.KeySet)
                             return object;
-                        var message = new $root.google.spanner.v1.PlanNode();
-                        if (object.index != null)
-                            message.index = object.index | 0;
-                        switch (object.kind) {
-                        default:
-                            if (typeof object.kind === "number") {
-                                message.kind = object.kind;
-                                break;
+                        var message = new $root.google.spanner.v1.KeySet();
+                        if (object.keys) {
+                            if (!Array.isArray(object.keys))
+                                throw TypeError(".google.spanner.v1.KeySet.keys: array expected");
+                            message.keys = [];
+                            for (var i = 0; i < object.keys.length; ++i) {
+                                if (typeof object.keys[i] !== "object")
+                                    throw TypeError(".google.spanner.v1.KeySet.keys: object expected");
+                                message.keys[i] = $root.google.protobuf.ListValue.fromObject(object.keys[i]);
                             }
-                            break;
-                        case "KIND_UNSPECIFIED":
-                        case 0:
-                            message.kind = 0;
-                            break;
-                        case "RELATIONAL":
-                        case 1:
-                            message.kind = 1;
-                            break;
-                        case "SCALAR":
-                        case 2:
-                            message.kind = 2;
-                            break;
                         }
-                        if (object.displayName != null)
-                            message.displayName = String(object.displayName);
-                        if (object.childLinks) {
-                            if (!Array.isArray(object.childLinks))
-                                throw TypeError(".google.spanner.v1.PlanNode.childLinks: array expected");
-                            message.childLinks = [];
-                            for (var i = 0; i < object.childLinks.length; ++i) {
-                                if (typeof object.childLinks[i] !== "object")
-                                    throw TypeError(".google.spanner.v1.PlanNode.childLinks: object expected");
-                                message.childLinks[i] = $root.google.spanner.v1.PlanNode.ChildLink.fromObject(object.childLinks[i]);
+                        if (object.ranges) {
+                            if (!Array.isArray(object.ranges))
+                                throw TypeError(".google.spanner.v1.KeySet.ranges: array expected");
+                            message.ranges = [];
+                            for (var i = 0; i < object.ranges.length; ++i) {
+                                if (typeof object.ranges[i] !== "object")
+                                    throw TypeError(".google.spanner.v1.KeySet.ranges: object expected");
+                                message.ranges[i] = $root.google.spanner.v1.KeyRange.fromObject(object.ranges[i]);
                             }
                         }
-                        if (object.shortRepresentation != null) {
-                            if (typeof object.shortRepresentation !== "object")
-                                throw TypeError(".google.spanner.v1.PlanNode.shortRepresentation: object expected");
-                            message.shortRepresentation = $root.google.spanner.v1.PlanNode.ShortRepresentation.fromObject(object.shortRepresentation);
-                        }
-                        if (object.metadata != null) {
-                            if (typeof object.metadata !== "object")
-                                throw TypeError(".google.spanner.v1.PlanNode.metadata: object expected");
-                            message.metadata = $root.google.protobuf.Struct.fromObject(object.metadata);
-                        }
-                        if (object.executionStats != null) {
-                            if (typeof object.executionStats !== "object")
-                                throw TypeError(".google.spanner.v1.PlanNode.executionStats: object expected");
-                            message.executionStats = $root.google.protobuf.Struct.fromObject(object.executionStats);
-                        }
+                        if (object.all != null)
+                            message.all = Boolean(object.all);
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a PlanNode message. Also converts values to other types if specified.
+                     * Creates a plain object from a KeySet message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
-                     * @param {google.spanner.v1.PlanNode} message PlanNode
+                     * @param {google.spanner.v1.KeySet} message KeySet
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    PlanNode.toObject = function toObject(message, options) {
+                    KeySet.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
-                        if (options.arrays || options.defaults)
-                            object.childLinks = [];
-                        if (options.defaults) {
-                            object.index = 0;
-                            object.kind = options.enums === String ? "KIND_UNSPECIFIED" : 0;
-                            object.displayName = "";
-                            object.shortRepresentation = null;
-                            object.metadata = null;
-                            object.executionStats = null;
+                        if (options.arrays || options.defaults) {
+                            object.keys = [];
+                            object.ranges = [];
                         }
-                        if (message.index != null && message.hasOwnProperty("index"))
-                            object.index = message.index;
-                        if (message.kind != null && message.hasOwnProperty("kind"))
-                            object.kind = options.enums === String ? $root.google.spanner.v1.PlanNode.Kind[message.kind] === undefined ? message.kind : $root.google.spanner.v1.PlanNode.Kind[message.kind] : message.kind;
-                        if (message.displayName != null && message.hasOwnProperty("displayName"))
-                            object.displayName = message.displayName;
-                        if (message.childLinks && message.childLinks.length) {
-                            object.childLinks = [];
-                            for (var j = 0; j < message.childLinks.length; ++j)
-                                object.childLinks[j] = $root.google.spanner.v1.PlanNode.ChildLink.toObject(message.childLinks[j], options);
+                        if (options.defaults)
+                            object.all = false;
+                        if (message.keys && message.keys.length) {
+                            object.keys = [];
+                            for (var j = 0; j < message.keys.length; ++j)
+                                object.keys[j] = $root.google.protobuf.ListValue.toObject(message.keys[j], options);
                         }
-                        if (message.shortRepresentation != null && message.hasOwnProperty("shortRepresentation"))
-                            object.shortRepresentation = $root.google.spanner.v1.PlanNode.ShortRepresentation.toObject(message.shortRepresentation, options);
-                        if (message.metadata != null && message.hasOwnProperty("metadata"))
-                            object.metadata = $root.google.protobuf.Struct.toObject(message.metadata, options);
-                        if (message.executionStats != null && message.hasOwnProperty("executionStats"))
-                            object.executionStats = $root.google.protobuf.Struct.toObject(message.executionStats, options);
+                        if (message.ranges && message.ranges.length) {
+                            object.ranges = [];
+                            for (var j = 0; j < message.ranges.length; ++j)
+                                object.ranges[j] = $root.google.spanner.v1.KeyRange.toObject(message.ranges[j], options);
+                        }
+                        if (message.all != null && message.hasOwnProperty("all"))
+                            object.all = message.all;
                         return object;
                     };
     
                     /**
-                     * Converts this PlanNode to JSON.
+                     * Converts this KeySet to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    PlanNode.prototype.toJSON = function toJSON() {
+                    KeySet.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for PlanNode
+                     * Gets the default type url for KeySet
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.PlanNode
+                     * @memberof google.spanner.v1.KeySet
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    PlanNode.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    KeySet.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.PlanNode";
+                        return typeUrlPrefix + "/google.spanner.v1.KeySet";
                     };
     
+                    return KeySet;
+                })();
+    
+                v1.Mutation = (function() {
+    
                     /**
-                     * Kind enum.
-                     * @name google.spanner.v1.PlanNode.Kind
-                     * @enum {number}
-                     * @property {number} KIND_UNSPECIFIED=0 KIND_UNSPECIFIED value
-                     * @property {number} RELATIONAL=1 RELATIONAL value
-                     * @property {number} SCALAR=2 SCALAR value
+                     * Properties of a Mutation.
+                     * @memberof google.spanner.v1
+                     * @interface IMutation
+                     * @property {google.spanner.v1.Mutation.IWrite|null} [insert] Mutation insert
+                     * @property {google.spanner.v1.Mutation.IWrite|null} [update] Mutation update
+                     * @property {google.spanner.v1.Mutation.IWrite|null} [insertOrUpdate] Mutation insertOrUpdate
+                     * @property {google.spanner.v1.Mutation.IWrite|null} [replace] Mutation replace
+                     * @property {google.spanner.v1.Mutation.IDelete|null} ["delete"] Mutation delete
                      */
-                    PlanNode.Kind = (function() {
-                        var valuesById = {}, values = Object.create(valuesById);
-                        values[valuesById[0] = "KIND_UNSPECIFIED"] = 0;
-                        values[valuesById[1] = "RELATIONAL"] = 1;
-                        values[valuesById[2] = "SCALAR"] = 2;
-                        return values;
-                    })();
     
-                    PlanNode.ChildLink = (function() {
+                    /**
+                     * Constructs a new Mutation.
+                     * @memberof google.spanner.v1
+                     * @classdesc Represents a Mutation.
+                     * @implements IMutation
+                     * @constructor
+                     * @param {google.spanner.v1.IMutation=} [properties] Properties to set
+                     */
+                    function Mutation(properties) {
+                        if (properties)
+                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                if (properties[keys[i]] != null)
+                                    this[keys[i]] = properties[keys[i]];
+                    }
     
-                        /**
-                         * Properties of a ChildLink.
-                         * @memberof google.spanner.v1.PlanNode
-                         * @interface IChildLink
-                         * @property {number|null} [childIndex] ChildLink childIndex
-                         * @property {string|null} [type] ChildLink type
-                         * @property {string|null} [variable] ChildLink variable
-                         */
+                    /**
+                     * Mutation insert.
+                     * @member {google.spanner.v1.Mutation.IWrite|null|undefined} insert
+                     * @memberof google.spanner.v1.Mutation
+                     * @instance
+                     */
+                    Mutation.prototype.insert = null;
     
-                        /**
-                         * Constructs a new ChildLink.
-                         * @memberof google.spanner.v1.PlanNode
-                         * @classdesc Represents a ChildLink.
-                         * @implements IChildLink
-                         * @constructor
-                         * @param {google.spanner.v1.PlanNode.IChildLink=} [properties] Properties to set
-                         */
-                        function ChildLink(properties) {
-                            if (properties)
-                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                    if (properties[keys[i]] != null)
-                                        this[keys[i]] = properties[keys[i]];
-                        }
+                    /**
+                     * Mutation update.
+                     * @member {google.spanner.v1.Mutation.IWrite|null|undefined} update
+                     * @memberof google.spanner.v1.Mutation
+                     * @instance
+                     */
+                    Mutation.prototype.update = null;
     
-                        /**
-                         * ChildLink childIndex.
-                         * @member {number} childIndex
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @instance
-                         */
-                        ChildLink.prototype.childIndex = 0;
+                    /**
+                     * Mutation insertOrUpdate.
+                     * @member {google.spanner.v1.Mutation.IWrite|null|undefined} insertOrUpdate
+                     * @memberof google.spanner.v1.Mutation
+                     * @instance
+                     */
+                    Mutation.prototype.insertOrUpdate = null;
     
-                        /**
-                         * ChildLink type.
-                         * @member {string} type
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @instance
-                         */
-                        ChildLink.prototype.type = "";
+                    /**
+                     * Mutation replace.
+                     * @member {google.spanner.v1.Mutation.IWrite|null|undefined} replace
+                     * @memberof google.spanner.v1.Mutation
+                     * @instance
+                     */
+                    Mutation.prototype.replace = null;
     
-                        /**
-                         * ChildLink variable.
-                         * @member {string} variable
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @instance
-                         */
-                        ChildLink.prototype.variable = "";
+                    /**
+                     * Mutation delete.
+                     * @member {google.spanner.v1.Mutation.IDelete|null|undefined} delete
+                     * @memberof google.spanner.v1.Mutation
+                     * @instance
+                     */
+                    Mutation.prototype["delete"] = null;
     
-                        /**
-                         * Creates a new ChildLink instance using the specified properties.
-                         * @function create
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {google.spanner.v1.PlanNode.IChildLink=} [properties] Properties to set
-                         * @returns {google.spanner.v1.PlanNode.ChildLink} ChildLink instance
-                         */
-                        ChildLink.create = function create(properties) {
-                            return new ChildLink(properties);
-                        };
+                    // OneOf field names bound to virtual getters and setters
+                    var $oneOfFields;
     
-                        /**
-                         * Encodes the specified ChildLink message. Does not implicitly {@link google.spanner.v1.PlanNode.ChildLink.verify|verify} messages.
-                         * @function encode
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {google.spanner.v1.PlanNode.IChildLink} message ChildLink message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        ChildLink.encode = function encode(message, writer) {
-                            if (!writer)
-                                writer = $Writer.create();
-                            if (message.childIndex != null && Object.hasOwnProperty.call(message, "childIndex"))
-                                writer.uint32(/* id 1, wireType 0 =*/8).int32(message.childIndex);
-                            if (message.type != null && Object.hasOwnProperty.call(message, "type"))
-                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.type);
-                            if (message.variable != null && Object.hasOwnProperty.call(message, "variable"))
-                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.variable);
-                            return writer;
-                        };
+                    /**
+                     * Mutation operation.
+                     * @member {"insert"|"update"|"insertOrUpdate"|"replace"|"delete"|undefined} operation
+                     * @memberof google.spanner.v1.Mutation
+                     * @instance
+                     */
+                    Object.defineProperty(Mutation.prototype, "operation", {
+                        get: $util.oneOfGetter($oneOfFields = ["insert", "update", "insertOrUpdate", "replace", "delete"]),
+                        set: $util.oneOfSetter($oneOfFields)
+                    });
     
-                        /**
-                         * Encodes the specified ChildLink message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.ChildLink.verify|verify} messages.
-                         * @function encodeDelimited
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {google.spanner.v1.PlanNode.IChildLink} message ChildLink message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        ChildLink.encodeDelimited = function encodeDelimited(message, writer) {
-                            return this.encode(message, writer).ldelim();
-                        };
+                    /**
+                     * Creates a new Mutation instance using the specified properties.
+                     * @function create
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {google.spanner.v1.IMutation=} [properties] Properties to set
+                     * @returns {google.spanner.v1.Mutation} Mutation instance
+                     */
+                    Mutation.create = function create(properties) {
+                        return new Mutation(properties);
+                    };
     
-                        /**
-                         * Decodes a ChildLink message from the specified reader or buffer.
-                         * @function decode
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @param {number} [length] Message length if known beforehand
-                         * @returns {google.spanner.v1.PlanNode.ChildLink} ChildLink
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        ChildLink.decode = function decode(reader, length) {
-                            if (!(reader instanceof $Reader))
-                                reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.PlanNode.ChildLink();
-                            while (reader.pos < end) {
-                                var tag = reader.uint32();
-                                switch (tag >>> 3) {
-                                case 1: {
-                                        message.childIndex = reader.int32();
-                                        break;
-                                    }
-                                case 2: {
-                                        message.type = reader.string();
-                                        break;
-                                    }
-                                case 3: {
-                                        message.variable = reader.string();
-                                        break;
-                                    }
-                                default:
-                                    reader.skipType(tag & 7);
+                    /**
+                     * Encodes the specified Mutation message. Does not implicitly {@link google.spanner.v1.Mutation.verify|verify} messages.
+                     * @function encode
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {google.spanner.v1.IMutation} message Mutation message or plain object to encode
+                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                     * @returns {$protobuf.Writer} Writer
+                     */
+                    Mutation.encode = function encode(message, writer) {
+                        if (!writer)
+                            writer = $Writer.create();
+                        if (message.insert != null && Object.hasOwnProperty.call(message, "insert"))
+                            $root.google.spanner.v1.Mutation.Write.encode(message.insert, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.update != null && Object.hasOwnProperty.call(message, "update"))
+                            $root.google.spanner.v1.Mutation.Write.encode(message.update, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.insertOrUpdate != null && Object.hasOwnProperty.call(message, "insertOrUpdate"))
+                            $root.google.spanner.v1.Mutation.Write.encode(message.insertOrUpdate, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        if (message.replace != null && Object.hasOwnProperty.call(message, "replace"))
+                            $root.google.spanner.v1.Mutation.Write.encode(message.replace, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                        if (message["delete"] != null && Object.hasOwnProperty.call(message, "delete"))
+                            $root.google.spanner.v1.Mutation.Delete.encode(message["delete"], writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                        return writer;
+                    };
+    
+                    /**
+                     * Encodes the specified Mutation message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.verify|verify} messages.
+                     * @function encodeDelimited
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {google.spanner.v1.IMutation} message Mutation message or plain object to encode
+                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                     * @returns {$protobuf.Writer} Writer
+                     */
+                    Mutation.encodeDelimited = function encodeDelimited(message, writer) {
+                        return this.encode(message, writer).ldelim();
+                    };
+    
+                    /**
+                     * Decodes a Mutation message from the specified reader or buffer.
+                     * @function decode
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                     * @param {number} [length] Message length if known beforehand
+                     * @returns {google.spanner.v1.Mutation} Mutation
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    Mutation.decode = function decode(reader, length) {
+                        if (!(reader instanceof $Reader))
+                            reader = $Reader.create(reader);
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.Mutation();
+                        while (reader.pos < end) {
+                            var tag = reader.uint32();
+                            switch (tag >>> 3) {
+                            case 1: {
+                                    message.insert = $root.google.spanner.v1.Mutation.Write.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 2: {
+                                    message.update = $root.google.spanner.v1.Mutation.Write.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 3: {
+                                    message.insertOrUpdate = $root.google.spanner.v1.Mutation.Write.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 4: {
+                                    message.replace = $root.google.spanner.v1.Mutation.Write.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 5: {
+                                    message["delete"] = $root.google.spanner.v1.Mutation.Delete.decode(reader, reader.uint32());
                                     break;
                                 }
+                            default:
+                                reader.skipType(tag & 7);
+                                break;
                             }
-                            return message;
-                        };
-    
-                        /**
-                         * Decodes a ChildLink message from the specified reader or buffer, length delimited.
-                         * @function decodeDelimited
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.spanner.v1.PlanNode.ChildLink} ChildLink
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        ChildLink.decodeDelimited = function decodeDelimited(reader) {
-                            if (!(reader instanceof $Reader))
-                                reader = new $Reader(reader);
-                            return this.decode(reader, reader.uint32());
-                        };
-    
-                        /**
-                         * Verifies a ChildLink message.
-                         * @function verify
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {Object.<string,*>} message Plain object to verify
-                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                         */
-                        ChildLink.verify = function verify(message) {
-                            if (typeof message !== "object" || message === null)
-                                return "object expected";
-                            if (message.childIndex != null && message.hasOwnProperty("childIndex"))
-                                if (!$util.isInteger(message.childIndex))
-                                    return "childIndex: integer expected";
-                            if (message.type != null && message.hasOwnProperty("type"))
-                                if (!$util.isString(message.type))
-                                    return "type: string expected";
-                            if (message.variable != null && message.hasOwnProperty("variable"))
-                                if (!$util.isString(message.variable))
-                                    return "variable: string expected";
-                            return null;
-                        };
+                        }
+                        return message;
+                    };
     
-                        /**
-                         * Creates a ChildLink message from a plain object. Also converts values to their respective internal types.
-                         * @function fromObject
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {Object.<string,*>} object Plain object
-                         * @returns {google.spanner.v1.PlanNode.ChildLink} ChildLink
-                         */
-                        ChildLink.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.spanner.v1.PlanNode.ChildLink)
-                                return object;
-                            var message = new $root.google.spanner.v1.PlanNode.ChildLink();
-                            if (object.childIndex != null)
-                                message.childIndex = object.childIndex | 0;
-                            if (object.type != null)
-                                message.type = String(object.type);
-                            if (object.variable != null)
-                                message.variable = String(object.variable);
-                            return message;
-                        };
+                    /**
+                     * Decodes a Mutation message from the specified reader or buffer, length delimited.
+                     * @function decodeDelimited
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                     * @returns {google.spanner.v1.Mutation} Mutation
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    Mutation.decodeDelimited = function decodeDelimited(reader) {
+                        if (!(reader instanceof $Reader))
+                            reader = new $Reader(reader);
+                        return this.decode(reader, reader.uint32());
+                    };
     
-                        /**
-                         * Creates a plain object from a ChildLink message. Also converts values to other types if specified.
-                         * @function toObject
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {google.spanner.v1.PlanNode.ChildLink} message ChildLink
-                         * @param {$protobuf.IConversionOptions} [options] Conversion options
-                         * @returns {Object.<string,*>} Plain object
-                         */
-                        ChildLink.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.defaults) {
-                                object.childIndex = 0;
-                                object.type = "";
-                                object.variable = "";
+                    /**
+                     * Verifies a Mutation message.
+                     * @function verify
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {Object.<string,*>} message Plain object to verify
+                     * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                     */
+                    Mutation.verify = function verify(message) {
+                        if (typeof message !== "object" || message === null)
+                            return "object expected";
+                        var properties = {};
+                        if (message.insert != null && message.hasOwnProperty("insert")) {
+                            properties.operation = 1;
+                            {
+                                var error = $root.google.spanner.v1.Mutation.Write.verify(message.insert);
+                                if (error)
+                                    return "insert." + error;
                             }
-                            if (message.childIndex != null && message.hasOwnProperty("childIndex"))
-                                object.childIndex = message.childIndex;
-                            if (message.type != null && message.hasOwnProperty("type"))
-                                object.type = message.type;
-                            if (message.variable != null && message.hasOwnProperty("variable"))
-                                object.variable = message.variable;
+                        }
+                        if (message.update != null && message.hasOwnProperty("update")) {
+                            if (properties.operation === 1)
+                                return "operation: multiple values";
+                            properties.operation = 1;
+                            {
+                                var error = $root.google.spanner.v1.Mutation.Write.verify(message.update);
+                                if (error)
+                                    return "update." + error;
+                            }
+                        }
+                        if (message.insertOrUpdate != null && message.hasOwnProperty("insertOrUpdate")) {
+                            if (properties.operation === 1)
+                                return "operation: multiple values";
+                            properties.operation = 1;
+                            {
+                                var error = $root.google.spanner.v1.Mutation.Write.verify(message.insertOrUpdate);
+                                if (error)
+                                    return "insertOrUpdate." + error;
+                            }
+                        }
+                        if (message.replace != null && message.hasOwnProperty("replace")) {
+                            if (properties.operation === 1)
+                                return "operation: multiple values";
+                            properties.operation = 1;
+                            {
+                                var error = $root.google.spanner.v1.Mutation.Write.verify(message.replace);
+                                if (error)
+                                    return "replace." + error;
+                            }
+                        }
+                        if (message["delete"] != null && message.hasOwnProperty("delete")) {
+                            if (properties.operation === 1)
+                                return "operation: multiple values";
+                            properties.operation = 1;
+                            {
+                                var error = $root.google.spanner.v1.Mutation.Delete.verify(message["delete"]);
+                                if (error)
+                                    return "delete." + error;
+                            }
+                        }
+                        return null;
+                    };
+    
+                    /**
+                     * Creates a Mutation message from a plain object. Also converts values to their respective internal types.
+                     * @function fromObject
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {Object.<string,*>} object Plain object
+                     * @returns {google.spanner.v1.Mutation} Mutation
+                     */
+                    Mutation.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.Mutation)
                             return object;
-                        };
+                        var message = new $root.google.spanner.v1.Mutation();
+                        if (object.insert != null) {
+                            if (typeof object.insert !== "object")
+                                throw TypeError(".google.spanner.v1.Mutation.insert: object expected");
+                            message.insert = $root.google.spanner.v1.Mutation.Write.fromObject(object.insert);
+                        }
+                        if (object.update != null) {
+                            if (typeof object.update !== "object")
+                                throw TypeError(".google.spanner.v1.Mutation.update: object expected");
+                            message.update = $root.google.spanner.v1.Mutation.Write.fromObject(object.update);
+                        }
+                        if (object.insertOrUpdate != null) {
+                            if (typeof object.insertOrUpdate !== "object")
+                                throw TypeError(".google.spanner.v1.Mutation.insertOrUpdate: object expected");
+                            message.insertOrUpdate = $root.google.spanner.v1.Mutation.Write.fromObject(object.insertOrUpdate);
+                        }
+                        if (object.replace != null) {
+                            if (typeof object.replace !== "object")
+                                throw TypeError(".google.spanner.v1.Mutation.replace: object expected");
+                            message.replace = $root.google.spanner.v1.Mutation.Write.fromObject(object.replace);
+                        }
+                        if (object["delete"] != null) {
+                            if (typeof object["delete"] !== "object")
+                                throw TypeError(".google.spanner.v1.Mutation.delete: object expected");
+                            message["delete"] = $root.google.spanner.v1.Mutation.Delete.fromObject(object["delete"]);
+                        }
+                        return message;
+                    };
     
-                        /**
-                         * Converts this ChildLink to JSON.
-                         * @function toJSON
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        ChildLink.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
+                    /**
+                     * Creates a plain object from a Mutation message. Also converts values to other types if specified.
+                     * @function toObject
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {google.spanner.v1.Mutation} message Mutation
+                     * @param {$protobuf.IConversionOptions} [options] Conversion options
+                     * @returns {Object.<string,*>} Plain object
+                     */
+                    Mutation.toObject = function toObject(message, options) {
+                        if (!options)
+                            options = {};
+                        var object = {};
+                        if (message.insert != null && message.hasOwnProperty("insert")) {
+                            object.insert = $root.google.spanner.v1.Mutation.Write.toObject(message.insert, options);
+                            if (options.oneofs)
+                                object.operation = "insert";
+                        }
+                        if (message.update != null && message.hasOwnProperty("update")) {
+                            object.update = $root.google.spanner.v1.Mutation.Write.toObject(message.update, options);
+                            if (options.oneofs)
+                                object.operation = "update";
+                        }
+                        if (message.insertOrUpdate != null && message.hasOwnProperty("insertOrUpdate")) {
+                            object.insertOrUpdate = $root.google.spanner.v1.Mutation.Write.toObject(message.insertOrUpdate, options);
+                            if (options.oneofs)
+                                object.operation = "insertOrUpdate";
+                        }
+                        if (message.replace != null && message.hasOwnProperty("replace")) {
+                            object.replace = $root.google.spanner.v1.Mutation.Write.toObject(message.replace, options);
+                            if (options.oneofs)
+                                object.operation = "replace";
+                        }
+                        if (message["delete"] != null && message.hasOwnProperty("delete")) {
+                            object["delete"] = $root.google.spanner.v1.Mutation.Delete.toObject(message["delete"], options);
+                            if (options.oneofs)
+                                object.operation = "delete";
+                        }
+                        return object;
+                    };
     
-                        /**
-                         * Gets the default type url for ChildLink
-                         * @function getTypeUrl
-                         * @memberof google.spanner.v1.PlanNode.ChildLink
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
-                         */
-                        ChildLink.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.spanner.v1.PlanNode.ChildLink";
-                        };
+                    /**
+                     * Converts this Mutation to JSON.
+                     * @function toJSON
+                     * @memberof google.spanner.v1.Mutation
+                     * @instance
+                     * @returns {Object.<string,*>} JSON object
+                     */
+                    Mutation.prototype.toJSON = function toJSON() {
+                        return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                    };
     
-                        return ChildLink;
-                    })();
+                    /**
+                     * Gets the default type url for Mutation
+                     * @function getTypeUrl
+                     * @memberof google.spanner.v1.Mutation
+                     * @static
+                     * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns {string} The default type url
+                     */
+                    Mutation.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        if (typeUrlPrefix === undefined) {
+                            typeUrlPrefix = "type.googleapis.com";
+                        }
+                        return typeUrlPrefix + "/google.spanner.v1.Mutation";
+                    };
     
-                    PlanNode.ShortRepresentation = (function() {
+                    Mutation.Write = (function() {
     
                         /**
-                         * Properties of a ShortRepresentation.
-                         * @memberof google.spanner.v1.PlanNode
-                         * @interface IShortRepresentation
-                         * @property {string|null} [description] ShortRepresentation description
-                         * @property {Object.<string,number>|null} [subqueries] ShortRepresentation subqueries
+                         * Properties of a Write.
+                         * @memberof google.spanner.v1.Mutation
+                         * @interface IWrite
+                         * @property {string|null} [table] Write table
+                         * @property {Array.<string>|null} [columns] Write columns
+                         * @property {Array.<google.protobuf.IListValue>|null} [values] Write values
                          */
     
                         /**
-                         * Constructs a new ShortRepresentation.
-                         * @memberof google.spanner.v1.PlanNode
-                         * @classdesc Represents a ShortRepresentation.
-                         * @implements IShortRepresentation
+                         * Constructs a new Write.
+                         * @memberof google.spanner.v1.Mutation
+                         * @classdesc Represents a Write.
+                         * @implements IWrite
                          * @constructor
-                         * @param {google.spanner.v1.PlanNode.IShortRepresentation=} [properties] Properties to set
+                         * @param {google.spanner.v1.Mutation.IWrite=} [properties] Properties to set
                          */
-                        function ShortRepresentation(properties) {
-                            this.subqueries = {};
+                        function Write(properties) {
+                            this.columns = [];
+                            this.values = [];
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -83400,109 +84208,109 @@
                         }
     
                         /**
-                         * ShortRepresentation description.
-                         * @member {string} description
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * Write table.
+                         * @member {string} table
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @instance
                          */
-                        ShortRepresentation.prototype.description = "";
+                        Write.prototype.table = "";
     
                         /**
-                         * ShortRepresentation subqueries.
-                         * @member {Object.<string,number>} subqueries
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * Write columns.
+                         * @member {Array.<string>} columns
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @instance
                          */
-                        ShortRepresentation.prototype.subqueries = $util.emptyObject;
+                        Write.prototype.columns = $util.emptyArray;
     
                         /**
-                         * Creates a new ShortRepresentation instance using the specified properties.
+                         * Write values.
+                         * @member {Array.<google.protobuf.IListValue>} values
+                         * @memberof google.spanner.v1.Mutation.Write
+                         * @instance
+                         */
+                        Write.prototype.values = $util.emptyArray;
+    
+                        /**
+                         * Creates a new Write instance using the specified properties.
                          * @function create
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @static
-                         * @param {google.spanner.v1.PlanNode.IShortRepresentation=} [properties] Properties to set
-                         * @returns {google.spanner.v1.PlanNode.ShortRepresentation} ShortRepresentation instance
+                         * @param {google.spanner.v1.Mutation.IWrite=} [properties] Properties to set
+                         * @returns {google.spanner.v1.Mutation.Write} Write instance
                          */
-                        ShortRepresentation.create = function create(properties) {
-                            return new ShortRepresentation(properties);
+                        Write.create = function create(properties) {
+                            return new Write(properties);
                         };
     
                         /**
-                         * Encodes the specified ShortRepresentation message. Does not implicitly {@link google.spanner.v1.PlanNode.ShortRepresentation.verify|verify} messages.
+                         * Encodes the specified Write message. Does not implicitly {@link google.spanner.v1.Mutation.Write.verify|verify} messages.
                          * @function encode
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @static
-                         * @param {google.spanner.v1.PlanNode.IShortRepresentation} message ShortRepresentation message or plain object to encode
+                         * @param {google.spanner.v1.Mutation.IWrite} message Write message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ShortRepresentation.encode = function encode(message, writer) {
+                        Write.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.description != null && Object.hasOwnProperty.call(message, "description"))
-                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.description);
-                            if (message.subqueries != null && Object.hasOwnProperty.call(message, "subqueries"))
-                                for (var keys = Object.keys(message.subqueries), i = 0; i < keys.length; ++i)
-                                    writer.uint32(/* id 2, wireType 2 =*/18).fork().uint32(/* id 1, wireType 2 =*/10).string(keys[i]).uint32(/* id 2, wireType 0 =*/16).int32(message.subqueries[keys[i]]).ldelim();
+                            if (message.table != null && Object.hasOwnProperty.call(message, "table"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.table);
+                            if (message.columns != null && message.columns.length)
+                                for (var i = 0; i < message.columns.length; ++i)
+                                    writer.uint32(/* id 2, wireType 2 =*/18).string(message.columns[i]);
+                            if (message.values != null && message.values.length)
+                                for (var i = 0; i < message.values.length; ++i)
+                                    $root.google.protobuf.ListValue.encode(message.values[i], writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ShortRepresentation message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.ShortRepresentation.verify|verify} messages.
+                         * Encodes the specified Write message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.Write.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @static
-                         * @param {google.spanner.v1.PlanNode.IShortRepresentation} message ShortRepresentation message or plain object to encode
+                         * @param {google.spanner.v1.Mutation.IWrite} message Write message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ShortRepresentation.encodeDelimited = function encodeDelimited(message, writer) {
+                        Write.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a ShortRepresentation message from the specified reader or buffer.
+                         * Decodes a Write message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.spanner.v1.PlanNode.ShortRepresentation} ShortRepresentation
+                         * @returns {google.spanner.v1.Mutation.Write} Write
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ShortRepresentation.decode = function decode(reader, length) {
+                        Write.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.PlanNode.ShortRepresentation(), key, value;
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.Mutation.Write();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.description = reader.string();
+                                        message.table = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        if (message.subqueries === $util.emptyObject)
-                                            message.subqueries = {};
-                                        var end2 = reader.uint32() + reader.pos;
-                                        key = "";
-                                        value = 0;
-                                        while (reader.pos < end2) {
-                                            var tag2 = reader.uint32();
-                                            switch (tag2 >>> 3) {
-                                            case 1:
-                                                key = reader.string();
-                                                break;
-                                            case 2:
-                                                value = reader.int32();
-                                                break;
-                                            default:
-                                                reader.skipType(tag2 & 7);
-                                                break;
-                                            }
-                                        }
-                                        message.subqueries[key] = value;
+                                        if (!(message.columns && message.columns.length))
+                                            message.columns = [];
+                                        message.columns.push(reader.string());
+                                        break;
+                                    }
+                                case 3: {
+                                        if (!(message.values && message.values.length))
+                                            message.values = [];
+                                        message.values.push($root.google.protobuf.ListValue.decode(reader, reader.uint32()));
                                         break;
                                     }
                                 default:
@@ -83514,149 +84322,1347 @@
                         };
     
                         /**
-                         * Decodes a ShortRepresentation message from the specified reader or buffer, length delimited.
+                         * Decodes a Write message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.spanner.v1.PlanNode.ShortRepresentation} ShortRepresentation
+                         * @returns {google.spanner.v1.Mutation.Write} Write
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ShortRepresentation.decodeDelimited = function decodeDelimited(reader) {
+                        Write.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a ShortRepresentation message.
+                         * Verifies a Write message.
                          * @function verify
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ShortRepresentation.verify = function verify(message) {
+                        Write.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            if (message.description != null && message.hasOwnProperty("description"))
-                                if (!$util.isString(message.description))
-                                    return "description: string expected";
-                            if (message.subqueries != null && message.hasOwnProperty("subqueries")) {
-                                if (!$util.isObject(message.subqueries))
-                                    return "subqueries: object expected";
-                                var key = Object.keys(message.subqueries);
-                                for (var i = 0; i < key.length; ++i)
-                                    if (!$util.isInteger(message.subqueries[key[i]]))
-                                        return "subqueries: integer{k:string} expected";
+                            if (message.table != null && message.hasOwnProperty("table"))
+                                if (!$util.isString(message.table))
+                                    return "table: string expected";
+                            if (message.columns != null && message.hasOwnProperty("columns")) {
+                                if (!Array.isArray(message.columns))
+                                    return "columns: array expected";
+                                for (var i = 0; i < message.columns.length; ++i)
+                                    if (!$util.isString(message.columns[i]))
+                                        return "columns: string[] expected";
+                            }
+                            if (message.values != null && message.hasOwnProperty("values")) {
+                                if (!Array.isArray(message.values))
+                                    return "values: array expected";
+                                for (var i = 0; i < message.values.length; ++i) {
+                                    var error = $root.google.protobuf.ListValue.verify(message.values[i]);
+                                    if (error)
+                                        return "values." + error;
+                                }
                             }
                             return null;
                         };
     
                         /**
-                         * Creates a ShortRepresentation message from a plain object. Also converts values to their respective internal types.
+                         * Creates a Write message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.spanner.v1.PlanNode.ShortRepresentation} ShortRepresentation
+                         * @returns {google.spanner.v1.Mutation.Write} Write
                          */
-                        ShortRepresentation.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.spanner.v1.PlanNode.ShortRepresentation)
+                        Write.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.spanner.v1.Mutation.Write)
                                 return object;
-                            var message = new $root.google.spanner.v1.PlanNode.ShortRepresentation();
-                            if (object.description != null)
-                                message.description = String(object.description);
-                            if (object.subqueries) {
-                                if (typeof object.subqueries !== "object")
-                                    throw TypeError(".google.spanner.v1.PlanNode.ShortRepresentation.subqueries: object expected");
-                                message.subqueries = {};
-                                for (var keys = Object.keys(object.subqueries), i = 0; i < keys.length; ++i)
-                                    message.subqueries[keys[i]] = object.subqueries[keys[i]] | 0;
+                            var message = new $root.google.spanner.v1.Mutation.Write();
+                            if (object.table != null)
+                                message.table = String(object.table);
+                            if (object.columns) {
+                                if (!Array.isArray(object.columns))
+                                    throw TypeError(".google.spanner.v1.Mutation.Write.columns: array expected");
+                                message.columns = [];
+                                for (var i = 0; i < object.columns.length; ++i)
+                                    message.columns[i] = String(object.columns[i]);
+                            }
+                            if (object.values) {
+                                if (!Array.isArray(object.values))
+                                    throw TypeError(".google.spanner.v1.Mutation.Write.values: array expected");
+                                message.values = [];
+                                for (var i = 0; i < object.values.length; ++i) {
+                                    if (typeof object.values[i] !== "object")
+                                        throw TypeError(".google.spanner.v1.Mutation.Write.values: object expected");
+                                    message.values[i] = $root.google.protobuf.ListValue.fromObject(object.values[i]);
+                                }
                             }
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a ShortRepresentation message. Also converts values to other types if specified.
+                         * Creates a plain object from a Write message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
+                         * @memberof google.spanner.v1.Mutation.Write
                          * @static
-                         * @param {google.spanner.v1.PlanNode.ShortRepresentation} message ShortRepresentation
+                         * @param {google.spanner.v1.Mutation.Write} message Write
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ShortRepresentation.toObject = function toObject(message, options) {
+                        Write.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.objects || options.defaults)
-                                object.subqueries = {};
+                            if (options.arrays || options.defaults) {
+                                object.columns = [];
+                                object.values = [];
+                            }
                             if (options.defaults)
-                                object.description = "";
-                            if (message.description != null && message.hasOwnProperty("description"))
-                                object.description = message.description;
-                            var keys2;
-                            if (message.subqueries && (keys2 = Object.keys(message.subqueries)).length) {
-                                object.subqueries = {};
-                                for (var j = 0; j < keys2.length; ++j)
-                                    object.subqueries[keys2[j]] = message.subqueries[keys2[j]];
+                                object.table = "";
+                            if (message.table != null && message.hasOwnProperty("table"))
+                                object.table = message.table;
+                            if (message.columns && message.columns.length) {
+                                object.columns = [];
+                                for (var j = 0; j < message.columns.length; ++j)
+                                    object.columns[j] = message.columns[j];
+                            }
+                            if (message.values && message.values.length) {
+                                object.values = [];
+                                for (var j = 0; j < message.values.length; ++j)
+                                    object.values[j] = $root.google.protobuf.ListValue.toObject(message.values[j], options);
+                            }
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this Write to JSON.
+                         * @function toJSON
+                         * @memberof google.spanner.v1.Mutation.Write
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        Write.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for Write
+                         * @function getTypeUrl
+                         * @memberof google.spanner.v1.Mutation.Write
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        Write.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.spanner.v1.Mutation.Write";
+                        };
+    
+                        return Write;
+                    })();
+    
+                    Mutation.Delete = (function() {
+    
+                        /**
+                         * Properties of a Delete.
+                         * @memberof google.spanner.v1.Mutation
+                         * @interface IDelete
+                         * @property {string|null} [table] Delete table
+                         * @property {google.spanner.v1.IKeySet|null} [keySet] Delete keySet
+                         */
+    
+                        /**
+                         * Constructs a new Delete.
+                         * @memberof google.spanner.v1.Mutation
+                         * @classdesc Represents a Delete.
+                         * @implements IDelete
+                         * @constructor
+                         * @param {google.spanner.v1.Mutation.IDelete=} [properties] Properties to set
+                         */
+                        function Delete(properties) {
+                            if (properties)
+                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                    if (properties[keys[i]] != null)
+                                        this[keys[i]] = properties[keys[i]];
+                        }
+    
+                        /**
+                         * Delete table.
+                         * @member {string} table
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @instance
+                         */
+                        Delete.prototype.table = "";
+    
+                        /**
+                         * Delete keySet.
+                         * @member {google.spanner.v1.IKeySet|null|undefined} keySet
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @instance
+                         */
+                        Delete.prototype.keySet = null;
+    
+                        /**
+                         * Creates a new Delete instance using the specified properties.
+                         * @function create
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {google.spanner.v1.Mutation.IDelete=} [properties] Properties to set
+                         * @returns {google.spanner.v1.Mutation.Delete} Delete instance
+                         */
+                        Delete.create = function create(properties) {
+                            return new Delete(properties);
+                        };
+    
+                        /**
+                         * Encodes the specified Delete message. Does not implicitly {@link google.spanner.v1.Mutation.Delete.verify|verify} messages.
+                         * @function encode
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {google.spanner.v1.Mutation.IDelete} message Delete message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        Delete.encode = function encode(message, writer) {
+                            if (!writer)
+                                writer = $Writer.create();
+                            if (message.table != null && Object.hasOwnProperty.call(message, "table"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.table);
+                            if (message.keySet != null && Object.hasOwnProperty.call(message, "keySet"))
+                                $root.google.spanner.v1.KeySet.encode(message.keySet, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                            return writer;
+                        };
+    
+                        /**
+                         * Encodes the specified Delete message, length delimited. Does not implicitly {@link google.spanner.v1.Mutation.Delete.verify|verify} messages.
+                         * @function encodeDelimited
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {google.spanner.v1.Mutation.IDelete} message Delete message or plain object to encode
+                         * @param {$protobuf.Writer} [writer] Writer to encode to
+                         * @returns {$protobuf.Writer} Writer
+                         */
+                        Delete.encodeDelimited = function encodeDelimited(message, writer) {
+                            return this.encode(message, writer).ldelim();
+                        };
+    
+                        /**
+                         * Decodes a Delete message from the specified reader or buffer.
+                         * @function decode
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @param {number} [length] Message length if known beforehand
+                         * @returns {google.spanner.v1.Mutation.Delete} Delete
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        Delete.decode = function decode(reader, length) {
+                            if (!(reader instanceof $Reader))
+                                reader = $Reader.create(reader);
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.Mutation.Delete();
+                            while (reader.pos < end) {
+                                var tag = reader.uint32();
+                                switch (tag >>> 3) {
+                                case 1: {
+                                        message.table = reader.string();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.keySet = $root.google.spanner.v1.KeySet.decode(reader, reader.uint32());
+                                        break;
+                                    }
+                                default:
+                                    reader.skipType(tag & 7);
+                                    break;
+                                }
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Decodes a Delete message from the specified reader or buffer, length delimited.
+                         * @function decodeDelimited
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                         * @returns {google.spanner.v1.Mutation.Delete} Delete
+                         * @throws {Error} If the payload is not a reader or valid buffer
+                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                         */
+                        Delete.decodeDelimited = function decodeDelimited(reader) {
+                            if (!(reader instanceof $Reader))
+                                reader = new $Reader(reader);
+                            return this.decode(reader, reader.uint32());
+                        };
+    
+                        /**
+                         * Verifies a Delete message.
+                         * @function verify
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {Object.<string,*>} message Plain object to verify
+                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                         */
+                        Delete.verify = function verify(message) {
+                            if (typeof message !== "object" || message === null)
+                                return "object expected";
+                            if (message.table != null && message.hasOwnProperty("table"))
+                                if (!$util.isString(message.table))
+                                    return "table: string expected";
+                            if (message.keySet != null && message.hasOwnProperty("keySet")) {
+                                var error = $root.google.spanner.v1.KeySet.verify(message.keySet);
+                                if (error)
+                                    return "keySet." + error;
+                            }
+                            return null;
+                        };
+    
+                        /**
+                         * Creates a Delete message from a plain object. Also converts values to their respective internal types.
+                         * @function fromObject
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {Object.<string,*>} object Plain object
+                         * @returns {google.spanner.v1.Mutation.Delete} Delete
+                         */
+                        Delete.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.spanner.v1.Mutation.Delete)
+                                return object;
+                            var message = new $root.google.spanner.v1.Mutation.Delete();
+                            if (object.table != null)
+                                message.table = String(object.table);
+                            if (object.keySet != null) {
+                                if (typeof object.keySet !== "object")
+                                    throw TypeError(".google.spanner.v1.Mutation.Delete.keySet: object expected");
+                                message.keySet = $root.google.spanner.v1.KeySet.fromObject(object.keySet);
+                            }
+                            return message;
+                        };
+    
+                        /**
+                         * Creates a plain object from a Delete message. Also converts values to other types if specified.
+                         * @function toObject
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {google.spanner.v1.Mutation.Delete} message Delete
+                         * @param {$protobuf.IConversionOptions} [options] Conversion options
+                         * @returns {Object.<string,*>} Plain object
+                         */
+                        Delete.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.table = "";
+                                object.keySet = null;
+                            }
+                            if (message.table != null && message.hasOwnProperty("table"))
+                                object.table = message.table;
+                            if (message.keySet != null && message.hasOwnProperty("keySet"))
+                                object.keySet = $root.google.spanner.v1.KeySet.toObject(message.keySet, options);
+                            return object;
+                        };
+    
+                        /**
+                         * Converts this Delete to JSON.
+                         * @function toJSON
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @instance
+                         * @returns {Object.<string,*>} JSON object
+                         */
+                        Delete.prototype.toJSON = function toJSON() {
+                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                        };
+    
+                        /**
+                         * Gets the default type url for Delete
+                         * @function getTypeUrl
+                         * @memberof google.spanner.v1.Mutation.Delete
+                         * @static
+                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                         * @returns {string} The default type url
+                         */
+                        Delete.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                            if (typeUrlPrefix === undefined) {
+                                typeUrlPrefix = "type.googleapis.com";
+                            }
+                            return typeUrlPrefix + "/google.spanner.v1.Mutation.Delete";
+                        };
+    
+                        return Delete;
+                    })();
+    
+                    return Mutation;
+                })();
+    
+                v1.ResultSet = (function() {
+    
+                    /**
+                     * Properties of a ResultSet.
+                     * @memberof google.spanner.v1
+                     * @interface IResultSet
+                     * @property {google.spanner.v1.IResultSetMetadata|null} [metadata] ResultSet metadata
+                     * @property {Array.<google.protobuf.IListValue>|null} [rows] ResultSet rows
+                     * @property {google.spanner.v1.IResultSetStats|null} [stats] ResultSet stats
+                     * @property {google.spanner.v1.IMultiplexedSessionPrecommitToken|null} [precommitToken] ResultSet precommitToken
+                     */
+    
+                    /**
+                     * Constructs a new ResultSet.
+                     * @memberof google.spanner.v1
+                     * @classdesc Represents a ResultSet.
+                     * @implements IResultSet
+                     * @constructor
+                     * @param {google.spanner.v1.IResultSet=} [properties] Properties to set
+                     */
+                    function ResultSet(properties) {
+                        this.rows = [];
+                        if (properties)
+                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                if (properties[keys[i]] != null)
+                                    this[keys[i]] = properties[keys[i]];
+                    }
+    
+                    /**
+                     * ResultSet metadata.
+                     * @member {google.spanner.v1.IResultSetMetadata|null|undefined} metadata
+                     * @memberof google.spanner.v1.ResultSet
+                     * @instance
+                     */
+                    ResultSet.prototype.metadata = null;
+    
+                    /**
+                     * ResultSet rows.
+                     * @member {Array.<google.protobuf.IListValue>} rows
+                     * @memberof google.spanner.v1.ResultSet
+                     * @instance
+                     */
+                    ResultSet.prototype.rows = $util.emptyArray;
+    
+                    /**
+                     * ResultSet stats.
+                     * @member {google.spanner.v1.IResultSetStats|null|undefined} stats
+                     * @memberof google.spanner.v1.ResultSet
+                     * @instance
+                     */
+                    ResultSet.prototype.stats = null;
+    
+                    /**
+                     * ResultSet precommitToken.
+                     * @member {google.spanner.v1.IMultiplexedSessionPrecommitToken|null|undefined} precommitToken
+                     * @memberof google.spanner.v1.ResultSet
+                     * @instance
+                     */
+                    ResultSet.prototype.precommitToken = null;
+    
+                    /**
+                     * Creates a new ResultSet instance using the specified properties.
+                     * @function create
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {google.spanner.v1.IResultSet=} [properties] Properties to set
+                     * @returns {google.spanner.v1.ResultSet} ResultSet instance
+                     */
+                    ResultSet.create = function create(properties) {
+                        return new ResultSet(properties);
+                    };
+    
+                    /**
+                     * Encodes the specified ResultSet message. Does not implicitly {@link google.spanner.v1.ResultSet.verify|verify} messages.
+                     * @function encode
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {google.spanner.v1.IResultSet} message ResultSet message or plain object to encode
+                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                     * @returns {$protobuf.Writer} Writer
+                     */
+                    ResultSet.encode = function encode(message, writer) {
+                        if (!writer)
+                            writer = $Writer.create();
+                        if (message.metadata != null && Object.hasOwnProperty.call(message, "metadata"))
+                            $root.google.spanner.v1.ResultSetMetadata.encode(message.metadata, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.rows != null && message.rows.length)
+                            for (var i = 0; i < message.rows.length; ++i)
+                                $root.google.protobuf.ListValue.encode(message.rows[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.stats != null && Object.hasOwnProperty.call(message, "stats"))
+                            $root.google.spanner.v1.ResultSetStats.encode(message.stats, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        if (message.precommitToken != null && Object.hasOwnProperty.call(message, "precommitToken"))
+                            $root.google.spanner.v1.MultiplexedSessionPrecommitToken.encode(message.precommitToken, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                        return writer;
+                    };
+    
+                    /**
+                     * Encodes the specified ResultSet message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSet.verify|verify} messages.
+                     * @function encodeDelimited
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {google.spanner.v1.IResultSet} message ResultSet message or plain object to encode
+                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                     * @returns {$protobuf.Writer} Writer
+                     */
+                    ResultSet.encodeDelimited = function encodeDelimited(message, writer) {
+                        return this.encode(message, writer).ldelim();
+                    };
+    
+                    /**
+                     * Decodes a ResultSet message from the specified reader or buffer.
+                     * @function decode
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                     * @param {number} [length] Message length if known beforehand
+                     * @returns {google.spanner.v1.ResultSet} ResultSet
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    ResultSet.decode = function decode(reader, length) {
+                        if (!(reader instanceof $Reader))
+                            reader = $Reader.create(reader);
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.ResultSet();
+                        while (reader.pos < end) {
+                            var tag = reader.uint32();
+                            switch (tag >>> 3) {
+                            case 1: {
+                                    message.metadata = $root.google.spanner.v1.ResultSetMetadata.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 2: {
+                                    if (!(message.rows && message.rows.length))
+                                        message.rows = [];
+                                    message.rows.push($root.google.protobuf.ListValue.decode(reader, reader.uint32()));
+                                    break;
+                                }
+                            case 3: {
+                                    message.stats = $root.google.spanner.v1.ResultSetStats.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 5: {
+                                    message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            default:
+                                reader.skipType(tag & 7);
+                                break;
+                            }
+                        }
+                        return message;
+                    };
+    
+                    /**
+                     * Decodes a ResultSet message from the specified reader or buffer, length delimited.
+                     * @function decodeDelimited
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                     * @returns {google.spanner.v1.ResultSet} ResultSet
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    ResultSet.decodeDelimited = function decodeDelimited(reader) {
+                        if (!(reader instanceof $Reader))
+                            reader = new $Reader(reader);
+                        return this.decode(reader, reader.uint32());
+                    };
+    
+                    /**
+                     * Verifies a ResultSet message.
+                     * @function verify
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {Object.<string,*>} message Plain object to verify
+                     * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                     */
+                    ResultSet.verify = function verify(message) {
+                        if (typeof message !== "object" || message === null)
+                            return "object expected";
+                        if (message.metadata != null && message.hasOwnProperty("metadata")) {
+                            var error = $root.google.spanner.v1.ResultSetMetadata.verify(message.metadata);
+                            if (error)
+                                return "metadata." + error;
+                        }
+                        if (message.rows != null && message.hasOwnProperty("rows")) {
+                            if (!Array.isArray(message.rows))
+                                return "rows: array expected";
+                            for (var i = 0; i < message.rows.length; ++i) {
+                                var error = $root.google.protobuf.ListValue.verify(message.rows[i]);
+                                if (error)
+                                    return "rows." + error;
                             }
+                        }
+                        if (message.stats != null && message.hasOwnProperty("stats")) {
+                            var error = $root.google.spanner.v1.ResultSetStats.verify(message.stats);
+                            if (error)
+                                return "stats." + error;
+                        }
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken")) {
+                            var error = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.verify(message.precommitToken);
+                            if (error)
+                                return "precommitToken." + error;
+                        }
+                        return null;
+                    };
+    
+                    /**
+                     * Creates a ResultSet message from a plain object. Also converts values to their respective internal types.
+                     * @function fromObject
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {Object.<string,*>} object Plain object
+                     * @returns {google.spanner.v1.ResultSet} ResultSet
+                     */
+                    ResultSet.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.ResultSet)
+                            return object;
+                        var message = new $root.google.spanner.v1.ResultSet();
+                        if (object.metadata != null) {
+                            if (typeof object.metadata !== "object")
+                                throw TypeError(".google.spanner.v1.ResultSet.metadata: object expected");
+                            message.metadata = $root.google.spanner.v1.ResultSetMetadata.fromObject(object.metadata);
+                        }
+                        if (object.rows) {
+                            if (!Array.isArray(object.rows))
+                                throw TypeError(".google.spanner.v1.ResultSet.rows: array expected");
+                            message.rows = [];
+                            for (var i = 0; i < object.rows.length; ++i) {
+                                if (typeof object.rows[i] !== "object")
+                                    throw TypeError(".google.spanner.v1.ResultSet.rows: object expected");
+                                message.rows[i] = $root.google.protobuf.ListValue.fromObject(object.rows[i]);
+                            }
+                        }
+                        if (object.stats != null) {
+                            if (typeof object.stats !== "object")
+                                throw TypeError(".google.spanner.v1.ResultSet.stats: object expected");
+                            message.stats = $root.google.spanner.v1.ResultSetStats.fromObject(object.stats);
+                        }
+                        if (object.precommitToken != null) {
+                            if (typeof object.precommitToken !== "object")
+                                throw TypeError(".google.spanner.v1.ResultSet.precommitToken: object expected");
+                            message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.fromObject(object.precommitToken);
+                        }
+                        return message;
+                    };
+    
+                    /**
+                     * Creates a plain object from a ResultSet message. Also converts values to other types if specified.
+                     * @function toObject
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {google.spanner.v1.ResultSet} message ResultSet
+                     * @param {$protobuf.IConversionOptions} [options] Conversion options
+                     * @returns {Object.<string,*>} Plain object
+                     */
+                    ResultSet.toObject = function toObject(message, options) {
+                        if (!options)
+                            options = {};
+                        var object = {};
+                        if (options.arrays || options.defaults)
+                            object.rows = [];
+                        if (options.defaults) {
+                            object.metadata = null;
+                            object.stats = null;
+                            object.precommitToken = null;
+                        }
+                        if (message.metadata != null && message.hasOwnProperty("metadata"))
+                            object.metadata = $root.google.spanner.v1.ResultSetMetadata.toObject(message.metadata, options);
+                        if (message.rows && message.rows.length) {
+                            object.rows = [];
+                            for (var j = 0; j < message.rows.length; ++j)
+                                object.rows[j] = $root.google.protobuf.ListValue.toObject(message.rows[j], options);
+                        }
+                        if (message.stats != null && message.hasOwnProperty("stats"))
+                            object.stats = $root.google.spanner.v1.ResultSetStats.toObject(message.stats, options);
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken"))
+                            object.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.toObject(message.precommitToken, options);
+                        return object;
+                    };
+    
+                    /**
+                     * Converts this ResultSet to JSON.
+                     * @function toJSON
+                     * @memberof google.spanner.v1.ResultSet
+                     * @instance
+                     * @returns {Object.<string,*>} JSON object
+                     */
+                    ResultSet.prototype.toJSON = function toJSON() {
+                        return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                    };
+    
+                    /**
+                     * Gets the default type url for ResultSet
+                     * @function getTypeUrl
+                     * @memberof google.spanner.v1.ResultSet
+                     * @static
+                     * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns {string} The default type url
+                     */
+                    ResultSet.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        if (typeUrlPrefix === undefined) {
+                            typeUrlPrefix = "type.googleapis.com";
+                        }
+                        return typeUrlPrefix + "/google.spanner.v1.ResultSet";
+                    };
+    
+                    return ResultSet;
+                })();
+    
+                v1.PartialResultSet = (function() {
+    
+                    /**
+                     * Properties of a PartialResultSet.
+                     * @memberof google.spanner.v1
+                     * @interface IPartialResultSet
+                     * @property {google.spanner.v1.IResultSetMetadata|null} [metadata] PartialResultSet metadata
+                     * @property {Array.<google.protobuf.IValue>|null} [values] PartialResultSet values
+                     * @property {boolean|null} [chunkedValue] PartialResultSet chunkedValue
+                     * @property {Uint8Array|null} [resumeToken] PartialResultSet resumeToken
+                     * @property {google.spanner.v1.IResultSetStats|null} [stats] PartialResultSet stats
+                     * @property {google.spanner.v1.IMultiplexedSessionPrecommitToken|null} [precommitToken] PartialResultSet precommitToken
+                     */
+    
+                    /**
+                     * Constructs a new PartialResultSet.
+                     * @memberof google.spanner.v1
+                     * @classdesc Represents a PartialResultSet.
+                     * @implements IPartialResultSet
+                     * @constructor
+                     * @param {google.spanner.v1.IPartialResultSet=} [properties] Properties to set
+                     */
+                    function PartialResultSet(properties) {
+                        this.values = [];
+                        if (properties)
+                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                if (properties[keys[i]] != null)
+                                    this[keys[i]] = properties[keys[i]];
+                    }
+    
+                    /**
+                     * PartialResultSet metadata.
+                     * @member {google.spanner.v1.IResultSetMetadata|null|undefined} metadata
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @instance
+                     */
+                    PartialResultSet.prototype.metadata = null;
+    
+                    /**
+                     * PartialResultSet values.
+                     * @member {Array.<google.protobuf.IValue>} values
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @instance
+                     */
+                    PartialResultSet.prototype.values = $util.emptyArray;
+    
+                    /**
+                     * PartialResultSet chunkedValue.
+                     * @member {boolean} chunkedValue
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @instance
+                     */
+                    PartialResultSet.prototype.chunkedValue = false;
+    
+                    /**
+                     * PartialResultSet resumeToken.
+                     * @member {Uint8Array} resumeToken
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @instance
+                     */
+                    PartialResultSet.prototype.resumeToken = $util.newBuffer([]);
+    
+                    /**
+                     * PartialResultSet stats.
+                     * @member {google.spanner.v1.IResultSetStats|null|undefined} stats
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @instance
+                     */
+                    PartialResultSet.prototype.stats = null;
+    
+                    /**
+                     * PartialResultSet precommitToken.
+                     * @member {google.spanner.v1.IMultiplexedSessionPrecommitToken|null|undefined} precommitToken
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @instance
+                     */
+                    PartialResultSet.prototype.precommitToken = null;
+    
+                    /**
+                     * Creates a new PartialResultSet instance using the specified properties.
+                     * @function create
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {google.spanner.v1.IPartialResultSet=} [properties] Properties to set
+                     * @returns {google.spanner.v1.PartialResultSet} PartialResultSet instance
+                     */
+                    PartialResultSet.create = function create(properties) {
+                        return new PartialResultSet(properties);
+                    };
+    
+                    /**
+                     * Encodes the specified PartialResultSet message. Does not implicitly {@link google.spanner.v1.PartialResultSet.verify|verify} messages.
+                     * @function encode
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {google.spanner.v1.IPartialResultSet} message PartialResultSet message or plain object to encode
+                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                     * @returns {$protobuf.Writer} Writer
+                     */
+                    PartialResultSet.encode = function encode(message, writer) {
+                        if (!writer)
+                            writer = $Writer.create();
+                        if (message.metadata != null && Object.hasOwnProperty.call(message, "metadata"))
+                            $root.google.spanner.v1.ResultSetMetadata.encode(message.metadata, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.values != null && message.values.length)
+                            for (var i = 0; i < message.values.length; ++i)
+                                $root.google.protobuf.Value.encode(message.values[i], writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.chunkedValue != null && Object.hasOwnProperty.call(message, "chunkedValue"))
+                            writer.uint32(/* id 3, wireType 0 =*/24).bool(message.chunkedValue);
+                        if (message.resumeToken != null && Object.hasOwnProperty.call(message, "resumeToken"))
+                            writer.uint32(/* id 4, wireType 2 =*/34).bytes(message.resumeToken);
+                        if (message.stats != null && Object.hasOwnProperty.call(message, "stats"))
+                            $root.google.spanner.v1.ResultSetStats.encode(message.stats, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                        if (message.precommitToken != null && Object.hasOwnProperty.call(message, "precommitToken"))
+                            $root.google.spanner.v1.MultiplexedSessionPrecommitToken.encode(message.precommitToken, writer.uint32(/* id 8, wireType 2 =*/66).fork()).ldelim();
+                        return writer;
+                    };
+    
+                    /**
+                     * Encodes the specified PartialResultSet message, length delimited. Does not implicitly {@link google.spanner.v1.PartialResultSet.verify|verify} messages.
+                     * @function encodeDelimited
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {google.spanner.v1.IPartialResultSet} message PartialResultSet message or plain object to encode
+                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                     * @returns {$protobuf.Writer} Writer
+                     */
+                    PartialResultSet.encodeDelimited = function encodeDelimited(message, writer) {
+                        return this.encode(message, writer).ldelim();
+                    };
+    
+                    /**
+                     * Decodes a PartialResultSet message from the specified reader or buffer.
+                     * @function decode
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                     * @param {number} [length] Message length if known beforehand
+                     * @returns {google.spanner.v1.PartialResultSet} PartialResultSet
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    PartialResultSet.decode = function decode(reader, length) {
+                        if (!(reader instanceof $Reader))
+                            reader = $Reader.create(reader);
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.PartialResultSet();
+                        while (reader.pos < end) {
+                            var tag = reader.uint32();
+                            switch (tag >>> 3) {
+                            case 1: {
+                                    message.metadata = $root.google.spanner.v1.ResultSetMetadata.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 2: {
+                                    if (!(message.values && message.values.length))
+                                        message.values = [];
+                                    message.values.push($root.google.protobuf.Value.decode(reader, reader.uint32()));
+                                    break;
+                                }
+                            case 3: {
+                                    message.chunkedValue = reader.bool();
+                                    break;
+                                }
+                            case 4: {
+                                    message.resumeToken = reader.bytes();
+                                    break;
+                                }
+                            case 5: {
+                                    message.stats = $root.google.spanner.v1.ResultSetStats.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 8: {
+                                    message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            default:
+                                reader.skipType(tag & 7);
+                                break;
+                            }
+                        }
+                        return message;
+                    };
+    
+                    /**
+                     * Decodes a PartialResultSet message from the specified reader or buffer, length delimited.
+                     * @function decodeDelimited
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                     * @returns {google.spanner.v1.PartialResultSet} PartialResultSet
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    PartialResultSet.decodeDelimited = function decodeDelimited(reader) {
+                        if (!(reader instanceof $Reader))
+                            reader = new $Reader(reader);
+                        return this.decode(reader, reader.uint32());
+                    };
+    
+                    /**
+                     * Verifies a PartialResultSet message.
+                     * @function verify
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {Object.<string,*>} message Plain object to verify
+                     * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                     */
+                    PartialResultSet.verify = function verify(message) {
+                        if (typeof message !== "object" || message === null)
+                            return "object expected";
+                        if (message.metadata != null && message.hasOwnProperty("metadata")) {
+                            var error = $root.google.spanner.v1.ResultSetMetadata.verify(message.metadata);
+                            if (error)
+                                return "metadata." + error;
+                        }
+                        if (message.values != null && message.hasOwnProperty("values")) {
+                            if (!Array.isArray(message.values))
+                                return "values: array expected";
+                            for (var i = 0; i < message.values.length; ++i) {
+                                var error = $root.google.protobuf.Value.verify(message.values[i]);
+                                if (error)
+                                    return "values." + error;
+                            }
+                        }
+                        if (message.chunkedValue != null && message.hasOwnProperty("chunkedValue"))
+                            if (typeof message.chunkedValue !== "boolean")
+                                return "chunkedValue: boolean expected";
+                        if (message.resumeToken != null && message.hasOwnProperty("resumeToken"))
+                            if (!(message.resumeToken && typeof message.resumeToken.length === "number" || $util.isString(message.resumeToken)))
+                                return "resumeToken: buffer expected";
+                        if (message.stats != null && message.hasOwnProperty("stats")) {
+                            var error = $root.google.spanner.v1.ResultSetStats.verify(message.stats);
+                            if (error)
+                                return "stats." + error;
+                        }
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken")) {
+                            var error = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.verify(message.precommitToken);
+                            if (error)
+                                return "precommitToken." + error;
+                        }
+                        return null;
+                    };
+    
+                    /**
+                     * Creates a PartialResultSet message from a plain object. Also converts values to their respective internal types.
+                     * @function fromObject
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {Object.<string,*>} object Plain object
+                     * @returns {google.spanner.v1.PartialResultSet} PartialResultSet
+                     */
+                    PartialResultSet.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.PartialResultSet)
+                            return object;
+                        var message = new $root.google.spanner.v1.PartialResultSet();
+                        if (object.metadata != null) {
+                            if (typeof object.metadata !== "object")
+                                throw TypeError(".google.spanner.v1.PartialResultSet.metadata: object expected");
+                            message.metadata = $root.google.spanner.v1.ResultSetMetadata.fromObject(object.metadata);
+                        }
+                        if (object.values) {
+                            if (!Array.isArray(object.values))
+                                throw TypeError(".google.spanner.v1.PartialResultSet.values: array expected");
+                            message.values = [];
+                            for (var i = 0; i < object.values.length; ++i) {
+                                if (typeof object.values[i] !== "object")
+                                    throw TypeError(".google.spanner.v1.PartialResultSet.values: object expected");
+                                message.values[i] = $root.google.protobuf.Value.fromObject(object.values[i]);
+                            }
+                        }
+                        if (object.chunkedValue != null)
+                            message.chunkedValue = Boolean(object.chunkedValue);
+                        if (object.resumeToken != null)
+                            if (typeof object.resumeToken === "string")
+                                $util.base64.decode(object.resumeToken, message.resumeToken = $util.newBuffer($util.base64.length(object.resumeToken)), 0);
+                            else if (object.resumeToken.length >= 0)
+                                message.resumeToken = object.resumeToken;
+                        if (object.stats != null) {
+                            if (typeof object.stats !== "object")
+                                throw TypeError(".google.spanner.v1.PartialResultSet.stats: object expected");
+                            message.stats = $root.google.spanner.v1.ResultSetStats.fromObject(object.stats);
+                        }
+                        if (object.precommitToken != null) {
+                            if (typeof object.precommitToken !== "object")
+                                throw TypeError(".google.spanner.v1.PartialResultSet.precommitToken: object expected");
+                            message.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.fromObject(object.precommitToken);
+                        }
+                        return message;
+                    };
+    
+                    /**
+                     * Creates a plain object from a PartialResultSet message. Also converts values to other types if specified.
+                     * @function toObject
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {google.spanner.v1.PartialResultSet} message PartialResultSet
+                     * @param {$protobuf.IConversionOptions} [options] Conversion options
+                     * @returns {Object.<string,*>} Plain object
+                     */
+                    PartialResultSet.toObject = function toObject(message, options) {
+                        if (!options)
+                            options = {};
+                        var object = {};
+                        if (options.arrays || options.defaults)
+                            object.values = [];
+                        if (options.defaults) {
+                            object.metadata = null;
+                            object.chunkedValue = false;
+                            if (options.bytes === String)
+                                object.resumeToken = "";
+                            else {
+                                object.resumeToken = [];
+                                if (options.bytes !== Array)
+                                    object.resumeToken = $util.newBuffer(object.resumeToken);
+                            }
+                            object.stats = null;
+                            object.precommitToken = null;
+                        }
+                        if (message.metadata != null && message.hasOwnProperty("metadata"))
+                            object.metadata = $root.google.spanner.v1.ResultSetMetadata.toObject(message.metadata, options);
+                        if (message.values && message.values.length) {
+                            object.values = [];
+                            for (var j = 0; j < message.values.length; ++j)
+                                object.values[j] = $root.google.protobuf.Value.toObject(message.values[j], options);
+                        }
+                        if (message.chunkedValue != null && message.hasOwnProperty("chunkedValue"))
+                            object.chunkedValue = message.chunkedValue;
+                        if (message.resumeToken != null && message.hasOwnProperty("resumeToken"))
+                            object.resumeToken = options.bytes === String ? $util.base64.encode(message.resumeToken, 0, message.resumeToken.length) : options.bytes === Array ? Array.prototype.slice.call(message.resumeToken) : message.resumeToken;
+                        if (message.stats != null && message.hasOwnProperty("stats"))
+                            object.stats = $root.google.spanner.v1.ResultSetStats.toObject(message.stats, options);
+                        if (message.precommitToken != null && message.hasOwnProperty("precommitToken"))
+                            object.precommitToken = $root.google.spanner.v1.MultiplexedSessionPrecommitToken.toObject(message.precommitToken, options);
+                        return object;
+                    };
+    
+                    /**
+                     * Converts this PartialResultSet to JSON.
+                     * @function toJSON
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @instance
+                     * @returns {Object.<string,*>} JSON object
+                     */
+                    PartialResultSet.prototype.toJSON = function toJSON() {
+                        return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                    };
+    
+                    /**
+                     * Gets the default type url for PartialResultSet
+                     * @function getTypeUrl
+                     * @memberof google.spanner.v1.PartialResultSet
+                     * @static
+                     * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns {string} The default type url
+                     */
+                    PartialResultSet.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        if (typeUrlPrefix === undefined) {
+                            typeUrlPrefix = "type.googleapis.com";
+                        }
+                        return typeUrlPrefix + "/google.spanner.v1.PartialResultSet";
+                    };
+    
+                    return PartialResultSet;
+                })();
+    
+                v1.ResultSetMetadata = (function() {
+    
+                    /**
+                     * Properties of a ResultSetMetadata.
+                     * @memberof google.spanner.v1
+                     * @interface IResultSetMetadata
+                     * @property {google.spanner.v1.IStructType|null} [rowType] ResultSetMetadata rowType
+                     * @property {google.spanner.v1.ITransaction|null} [transaction] ResultSetMetadata transaction
+                     * @property {google.spanner.v1.IStructType|null} [undeclaredParameters] ResultSetMetadata undeclaredParameters
+                     */
+    
+                    /**
+                     * Constructs a new ResultSetMetadata.
+                     * @memberof google.spanner.v1
+                     * @classdesc Represents a ResultSetMetadata.
+                     * @implements IResultSetMetadata
+                     * @constructor
+                     * @param {google.spanner.v1.IResultSetMetadata=} [properties] Properties to set
+                     */
+                    function ResultSetMetadata(properties) {
+                        if (properties)
+                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
+                                if (properties[keys[i]] != null)
+                                    this[keys[i]] = properties[keys[i]];
+                    }
+    
+                    /**
+                     * ResultSetMetadata rowType.
+                     * @member {google.spanner.v1.IStructType|null|undefined} rowType
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @instance
+                     */
+                    ResultSetMetadata.prototype.rowType = null;
+    
+                    /**
+                     * ResultSetMetadata transaction.
+                     * @member {google.spanner.v1.ITransaction|null|undefined} transaction
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @instance
+                     */
+                    ResultSetMetadata.prototype.transaction = null;
+    
+                    /**
+                     * ResultSetMetadata undeclaredParameters.
+                     * @member {google.spanner.v1.IStructType|null|undefined} undeclaredParameters
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @instance
+                     */
+                    ResultSetMetadata.prototype.undeclaredParameters = null;
+    
+                    /**
+                     * Creates a new ResultSetMetadata instance using the specified properties.
+                     * @function create
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {google.spanner.v1.IResultSetMetadata=} [properties] Properties to set
+                     * @returns {google.spanner.v1.ResultSetMetadata} ResultSetMetadata instance
+                     */
+                    ResultSetMetadata.create = function create(properties) {
+                        return new ResultSetMetadata(properties);
+                    };
+    
+                    /**
+                     * Encodes the specified ResultSetMetadata message. Does not implicitly {@link google.spanner.v1.ResultSetMetadata.verify|verify} messages.
+                     * @function encode
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {google.spanner.v1.IResultSetMetadata} message ResultSetMetadata message or plain object to encode
+                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                     * @returns {$protobuf.Writer} Writer
+                     */
+                    ResultSetMetadata.encode = function encode(message, writer) {
+                        if (!writer)
+                            writer = $Writer.create();
+                        if (message.rowType != null && Object.hasOwnProperty.call(message, "rowType"))
+                            $root.google.spanner.v1.StructType.encode(message.rowType, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.transaction != null && Object.hasOwnProperty.call(message, "transaction"))
+                            $root.google.spanner.v1.Transaction.encode(message.transaction, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.undeclaredParameters != null && Object.hasOwnProperty.call(message, "undeclaredParameters"))
+                            $root.google.spanner.v1.StructType.encode(message.undeclaredParameters, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        return writer;
+                    };
+    
+                    /**
+                     * Encodes the specified ResultSetMetadata message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSetMetadata.verify|verify} messages.
+                     * @function encodeDelimited
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {google.spanner.v1.IResultSetMetadata} message ResultSetMetadata message or plain object to encode
+                     * @param {$protobuf.Writer} [writer] Writer to encode to
+                     * @returns {$protobuf.Writer} Writer
+                     */
+                    ResultSetMetadata.encodeDelimited = function encodeDelimited(message, writer) {
+                        return this.encode(message, writer).ldelim();
+                    };
+    
+                    /**
+                     * Decodes a ResultSetMetadata message from the specified reader or buffer.
+                     * @function decode
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                     * @param {number} [length] Message length if known beforehand
+                     * @returns {google.spanner.v1.ResultSetMetadata} ResultSetMetadata
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    ResultSetMetadata.decode = function decode(reader, length) {
+                        if (!(reader instanceof $Reader))
+                            reader = $Reader.create(reader);
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.ResultSetMetadata();
+                        while (reader.pos < end) {
+                            var tag = reader.uint32();
+                            switch (tag >>> 3) {
+                            case 1: {
+                                    message.rowType = $root.google.spanner.v1.StructType.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 2: {
+                                    message.transaction = $root.google.spanner.v1.Transaction.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 3: {
+                                    message.undeclaredParameters = $root.google.spanner.v1.StructType.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            default:
+                                reader.skipType(tag & 7);
+                                break;
+                            }
+                        }
+                        return message;
+                    };
+    
+                    /**
+                     * Decodes a ResultSetMetadata message from the specified reader or buffer, length delimited.
+                     * @function decodeDelimited
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
+                     * @returns {google.spanner.v1.ResultSetMetadata} ResultSetMetadata
+                     * @throws {Error} If the payload is not a reader or valid buffer
+                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
+                     */
+                    ResultSetMetadata.decodeDelimited = function decodeDelimited(reader) {
+                        if (!(reader instanceof $Reader))
+                            reader = new $Reader(reader);
+                        return this.decode(reader, reader.uint32());
+                    };
+    
+                    /**
+                     * Verifies a ResultSetMetadata message.
+                     * @function verify
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {Object.<string,*>} message Plain object to verify
+                     * @returns {string|null} `null` if valid, otherwise the reason why it is not
+                     */
+                    ResultSetMetadata.verify = function verify(message) {
+                        if (typeof message !== "object" || message === null)
+                            return "object expected";
+                        if (message.rowType != null && message.hasOwnProperty("rowType")) {
+                            var error = $root.google.spanner.v1.StructType.verify(message.rowType);
+                            if (error)
+                                return "rowType." + error;
+                        }
+                        if (message.transaction != null && message.hasOwnProperty("transaction")) {
+                            var error = $root.google.spanner.v1.Transaction.verify(message.transaction);
+                            if (error)
+                                return "transaction." + error;
+                        }
+                        if (message.undeclaredParameters != null && message.hasOwnProperty("undeclaredParameters")) {
+                            var error = $root.google.spanner.v1.StructType.verify(message.undeclaredParameters);
+                            if (error)
+                                return "undeclaredParameters." + error;
+                        }
+                        return null;
+                    };
+    
+                    /**
+                     * Creates a ResultSetMetadata message from a plain object. Also converts values to their respective internal types.
+                     * @function fromObject
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {Object.<string,*>} object Plain object
+                     * @returns {google.spanner.v1.ResultSetMetadata} ResultSetMetadata
+                     */
+                    ResultSetMetadata.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.ResultSetMetadata)
                             return object;
-                        };
+                        var message = new $root.google.spanner.v1.ResultSetMetadata();
+                        if (object.rowType != null) {
+                            if (typeof object.rowType !== "object")
+                                throw TypeError(".google.spanner.v1.ResultSetMetadata.rowType: object expected");
+                            message.rowType = $root.google.spanner.v1.StructType.fromObject(object.rowType);
+                        }
+                        if (object.transaction != null) {
+                            if (typeof object.transaction !== "object")
+                                throw TypeError(".google.spanner.v1.ResultSetMetadata.transaction: object expected");
+                            message.transaction = $root.google.spanner.v1.Transaction.fromObject(object.transaction);
+                        }
+                        if (object.undeclaredParameters != null) {
+                            if (typeof object.undeclaredParameters !== "object")
+                                throw TypeError(".google.spanner.v1.ResultSetMetadata.undeclaredParameters: object expected");
+                            message.undeclaredParameters = $root.google.spanner.v1.StructType.fromObject(object.undeclaredParameters);
+                        }
+                        return message;
+                    };
     
-                        /**
-                         * Converts this ShortRepresentation to JSON.
-                         * @function toJSON
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        ShortRepresentation.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
+                    /**
+                     * Creates a plain object from a ResultSetMetadata message. Also converts values to other types if specified.
+                     * @function toObject
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {google.spanner.v1.ResultSetMetadata} message ResultSetMetadata
+                     * @param {$protobuf.IConversionOptions} [options] Conversion options
+                     * @returns {Object.<string,*>} Plain object
+                     */
+                    ResultSetMetadata.toObject = function toObject(message, options) {
+                        if (!options)
+                            options = {};
+                        var object = {};
+                        if (options.defaults) {
+                            object.rowType = null;
+                            object.transaction = null;
+                            object.undeclaredParameters = null;
+                        }
+                        if (message.rowType != null && message.hasOwnProperty("rowType"))
+                            object.rowType = $root.google.spanner.v1.StructType.toObject(message.rowType, options);
+                        if (message.transaction != null && message.hasOwnProperty("transaction"))
+                            object.transaction = $root.google.spanner.v1.Transaction.toObject(message.transaction, options);
+                        if (message.undeclaredParameters != null && message.hasOwnProperty("undeclaredParameters"))
+                            object.undeclaredParameters = $root.google.spanner.v1.StructType.toObject(message.undeclaredParameters, options);
+                        return object;
+                    };
     
-                        /**
-                         * Gets the default type url for ShortRepresentation
-                         * @function getTypeUrl
-                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
-                         */
-                        ShortRepresentation.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.spanner.v1.PlanNode.ShortRepresentation";
-                        };
+                    /**
+                     * Converts this ResultSetMetadata to JSON.
+                     * @function toJSON
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @instance
+                     * @returns {Object.<string,*>} JSON object
+                     */
+                    ResultSetMetadata.prototype.toJSON = function toJSON() {
+                        return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
+                    };
     
-                        return ShortRepresentation;
-                    })();
+                    /**
+                     * Gets the default type url for ResultSetMetadata
+                     * @function getTypeUrl
+                     * @memberof google.spanner.v1.ResultSetMetadata
+                     * @static
+                     * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
+                     * @returns {string} The default type url
+                     */
+                    ResultSetMetadata.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        if (typeUrlPrefix === undefined) {
+                            typeUrlPrefix = "type.googleapis.com";
+                        }
+                        return typeUrlPrefix + "/google.spanner.v1.ResultSetMetadata";
+                    };
     
-                    return PlanNode;
+                    return ResultSetMetadata;
                 })();
     
-                v1.QueryPlan = (function() {
+                v1.ResultSetStats = (function() {
     
                     /**
-                     * Properties of a QueryPlan.
+                     * Properties of a ResultSetStats.
                      * @memberof google.spanner.v1
-                     * @interface IQueryPlan
-                     * @property {Array.<google.spanner.v1.IPlanNode>|null} [planNodes] QueryPlan planNodes
+                     * @interface IResultSetStats
+                     * @property {google.spanner.v1.IQueryPlan|null} [queryPlan] ResultSetStats queryPlan
+                     * @property {google.protobuf.IStruct|null} [queryStats] ResultSetStats queryStats
+                     * @property {number|Long|null} [rowCountExact] ResultSetStats rowCountExact
+                     * @property {number|Long|null} [rowCountLowerBound] ResultSetStats rowCountLowerBound
                      */
     
                     /**
-                     * Constructs a new QueryPlan.
+                     * Constructs a new ResultSetStats.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a QueryPlan.
-                     * @implements IQueryPlan
+                     * @classdesc Represents a ResultSetStats.
+                     * @implements IResultSetStats
                      * @constructor
-                     * @param {google.spanner.v1.IQueryPlan=} [properties] Properties to set
+                     * @param {google.spanner.v1.IResultSetStats=} [properties] Properties to set
                      */
-                    function QueryPlan(properties) {
-                        this.planNodes = [];
+                    function ResultSetStats(properties) {
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -83664,78 +85670,131 @@
                     }
     
                     /**
-                     * QueryPlan planNodes.
-                     * @member {Array.<google.spanner.v1.IPlanNode>} planNodes
-                     * @memberof google.spanner.v1.QueryPlan
+                     * ResultSetStats queryPlan.
+                     * @member {google.spanner.v1.IQueryPlan|null|undefined} queryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @instance
                      */
-                    QueryPlan.prototype.planNodes = $util.emptyArray;
+                    ResultSetStats.prototype.queryPlan = null;
     
                     /**
-                     * Creates a new QueryPlan instance using the specified properties.
+                     * ResultSetStats queryStats.
+                     * @member {google.protobuf.IStruct|null|undefined} queryStats
+                     * @memberof google.spanner.v1.ResultSetStats
+                     * @instance
+                     */
+                    ResultSetStats.prototype.queryStats = null;
+    
+                    /**
+                     * ResultSetStats rowCountExact.
+                     * @member {number|Long|null|undefined} rowCountExact
+                     * @memberof google.spanner.v1.ResultSetStats
+                     * @instance
+                     */
+                    ResultSetStats.prototype.rowCountExact = null;
+    
+                    /**
+                     * ResultSetStats rowCountLowerBound.
+                     * @member {number|Long|null|undefined} rowCountLowerBound
+                     * @memberof google.spanner.v1.ResultSetStats
+                     * @instance
+                     */
+                    ResultSetStats.prototype.rowCountLowerBound = null;
+    
+                    // OneOf field names bound to virtual getters and setters
+                    var $oneOfFields;
+    
+                    /**
+                     * ResultSetStats rowCount.
+                     * @member {"rowCountExact"|"rowCountLowerBound"|undefined} rowCount
+                     * @memberof google.spanner.v1.ResultSetStats
+                     * @instance
+                     */
+                    Object.defineProperty(ResultSetStats.prototype, "rowCount", {
+                        get: $util.oneOfGetter($oneOfFields = ["rowCountExact", "rowCountLowerBound"]),
+                        set: $util.oneOfSetter($oneOfFields)
+                    });
+    
+                    /**
+                     * Creates a new ResultSetStats instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
-                     * @param {google.spanner.v1.IQueryPlan=} [properties] Properties to set
-                     * @returns {google.spanner.v1.QueryPlan} QueryPlan instance
+                     * @param {google.spanner.v1.IResultSetStats=} [properties] Properties to set
+                     * @returns {google.spanner.v1.ResultSetStats} ResultSetStats instance
                      */
-                    QueryPlan.create = function create(properties) {
-                        return new QueryPlan(properties);
+                    ResultSetStats.create = function create(properties) {
+                        return new ResultSetStats(properties);
                     };
     
                     /**
-                     * Encodes the specified QueryPlan message. Does not implicitly {@link google.spanner.v1.QueryPlan.verify|verify} messages.
+                     * Encodes the specified ResultSetStats message. Does not implicitly {@link google.spanner.v1.ResultSetStats.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
-                     * @param {google.spanner.v1.IQueryPlan} message QueryPlan message or plain object to encode
+                     * @param {google.spanner.v1.IResultSetStats} message ResultSetStats message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    QueryPlan.encode = function encode(message, writer) {
+                    ResultSetStats.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.planNodes != null && message.planNodes.length)
-                            for (var i = 0; i < message.planNodes.length; ++i)
-                                $root.google.spanner.v1.PlanNode.encode(message.planNodes[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.queryPlan != null && Object.hasOwnProperty.call(message, "queryPlan"))
+                            $root.google.spanner.v1.QueryPlan.encode(message.queryPlan, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
+                        if (message.queryStats != null && Object.hasOwnProperty.call(message, "queryStats"))
+                            $root.google.protobuf.Struct.encode(message.queryStats, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
+                        if (message.rowCountExact != null && Object.hasOwnProperty.call(message, "rowCountExact"))
+                            writer.uint32(/* id 3, wireType 0 =*/24).int64(message.rowCountExact);
+                        if (message.rowCountLowerBound != null && Object.hasOwnProperty.call(message, "rowCountLowerBound"))
+                            writer.uint32(/* id 4, wireType 0 =*/32).int64(message.rowCountLowerBound);
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified QueryPlan message, length delimited. Does not implicitly {@link google.spanner.v1.QueryPlan.verify|verify} messages.
+                     * Encodes the specified ResultSetStats message, length delimited. Does not implicitly {@link google.spanner.v1.ResultSetStats.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
-                     * @param {google.spanner.v1.IQueryPlan} message QueryPlan message or plain object to encode
+                     * @param {google.spanner.v1.IResultSetStats} message ResultSetStats message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    QueryPlan.encodeDelimited = function encodeDelimited(message, writer) {
+                    ResultSetStats.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a QueryPlan message from the specified reader or buffer.
+                     * Decodes a ResultSetStats message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.QueryPlan} QueryPlan
+                     * @returns {google.spanner.v1.ResultSetStats} ResultSetStats
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    QueryPlan.decode = function decode(reader, length) {
+                    ResultSetStats.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.QueryPlan();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.ResultSetStats();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    if (!(message.planNodes && message.planNodes.length))
-                                        message.planNodes = [];
-                                    message.planNodes.push($root.google.spanner.v1.PlanNode.decode(reader, reader.uint32()));
+                                    message.queryPlan = $root.google.spanner.v1.QueryPlan.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 2: {
+                                    message.queryStats = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 3: {
+                                    message.rowCountExact = reader.int64();
+                                    break;
+                                }
+                            case 4: {
+                                    message.rowCountLowerBound = reader.int64();
                                     break;
                                 }
                             default:
@@ -83747,142 +85806,195 @@
                     };
     
                     /**
-                     * Decodes a QueryPlan message from the specified reader or buffer, length delimited.
+                     * Decodes a ResultSetStats message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.QueryPlan} QueryPlan
+                     * @returns {google.spanner.v1.ResultSetStats} ResultSetStats
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    QueryPlan.decodeDelimited = function decodeDelimited(reader) {
+                    ResultSetStats.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a QueryPlan message.
+                     * Verifies a ResultSetStats message.
                      * @function verify
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    QueryPlan.verify = function verify(message) {
+                    ResultSetStats.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
-                        if (message.planNodes != null && message.hasOwnProperty("planNodes")) {
-                            if (!Array.isArray(message.planNodes))
-                                return "planNodes: array expected";
-                            for (var i = 0; i < message.planNodes.length; ++i) {
-                                var error = $root.google.spanner.v1.PlanNode.verify(message.planNodes[i]);
-                                if (error)
-                                    return "planNodes." + error;
-                            }
+                        var properties = {};
+                        if (message.queryPlan != null && message.hasOwnProperty("queryPlan")) {
+                            var error = $root.google.spanner.v1.QueryPlan.verify(message.queryPlan);
+                            if (error)
+                                return "queryPlan." + error;
+                        }
+                        if (message.queryStats != null && message.hasOwnProperty("queryStats")) {
+                            var error = $root.google.protobuf.Struct.verify(message.queryStats);
+                            if (error)
+                                return "queryStats." + error;
+                        }
+                        if (message.rowCountExact != null && message.hasOwnProperty("rowCountExact")) {
+                            properties.rowCount = 1;
+                            if (!$util.isInteger(message.rowCountExact) && !(message.rowCountExact && $util.isInteger(message.rowCountExact.low) && $util.isInteger(message.rowCountExact.high)))
+                                return "rowCountExact: integer|Long expected";
+                        }
+                        if (message.rowCountLowerBound != null && message.hasOwnProperty("rowCountLowerBound")) {
+                            if (properties.rowCount === 1)
+                                return "rowCount: multiple values";
+                            properties.rowCount = 1;
+                            if (!$util.isInteger(message.rowCountLowerBound) && !(message.rowCountLowerBound && $util.isInteger(message.rowCountLowerBound.low) && $util.isInteger(message.rowCountLowerBound.high)))
+                                return "rowCountLowerBound: integer|Long expected";
                         }
                         return null;
                     };
     
                     /**
-                     * Creates a QueryPlan message from a plain object. Also converts values to their respective internal types.
+                     * Creates a ResultSetStats message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.QueryPlan} QueryPlan
+                     * @returns {google.spanner.v1.ResultSetStats} ResultSetStats
                      */
-                    QueryPlan.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.QueryPlan)
+                    ResultSetStats.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.ResultSetStats)
                             return object;
-                        var message = new $root.google.spanner.v1.QueryPlan();
-                        if (object.planNodes) {
-                            if (!Array.isArray(object.planNodes))
-                                throw TypeError(".google.spanner.v1.QueryPlan.planNodes: array expected");
-                            message.planNodes = [];
-                            for (var i = 0; i < object.planNodes.length; ++i) {
-                                if (typeof object.planNodes[i] !== "object")
-                                    throw TypeError(".google.spanner.v1.QueryPlan.planNodes: object expected");
-                                message.planNodes[i] = $root.google.spanner.v1.PlanNode.fromObject(object.planNodes[i]);
-                            }
+                        var message = new $root.google.spanner.v1.ResultSetStats();
+                        if (object.queryPlan != null) {
+                            if (typeof object.queryPlan !== "object")
+                                throw TypeError(".google.spanner.v1.ResultSetStats.queryPlan: object expected");
+                            message.queryPlan = $root.google.spanner.v1.QueryPlan.fromObject(object.queryPlan);
+                        }
+                        if (object.queryStats != null) {
+                            if (typeof object.queryStats !== "object")
+                                throw TypeError(".google.spanner.v1.ResultSetStats.queryStats: object expected");
+                            message.queryStats = $root.google.protobuf.Struct.fromObject(object.queryStats);
                         }
+                        if (object.rowCountExact != null)
+                            if ($util.Long)
+                                (message.rowCountExact = $util.Long.fromValue(object.rowCountExact)).unsigned = false;
+                            else if (typeof object.rowCountExact === "string")
+                                message.rowCountExact = parseInt(object.rowCountExact, 10);
+                            else if (typeof object.rowCountExact === "number")
+                                message.rowCountExact = object.rowCountExact;
+                            else if (typeof object.rowCountExact === "object")
+                                message.rowCountExact = new $util.LongBits(object.rowCountExact.low >>> 0, object.rowCountExact.high >>> 0).toNumber();
+                        if (object.rowCountLowerBound != null)
+                            if ($util.Long)
+                                (message.rowCountLowerBound = $util.Long.fromValue(object.rowCountLowerBound)).unsigned = false;
+                            else if (typeof object.rowCountLowerBound === "string")
+                                message.rowCountLowerBound = parseInt(object.rowCountLowerBound, 10);
+                            else if (typeof object.rowCountLowerBound === "number")
+                                message.rowCountLowerBound = object.rowCountLowerBound;
+                            else if (typeof object.rowCountLowerBound === "object")
+                                message.rowCountLowerBound = new $util.LongBits(object.rowCountLowerBound.low >>> 0, object.rowCountLowerBound.high >>> 0).toNumber();
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a QueryPlan message. Also converts values to other types if specified.
+                     * Creates a plain object from a ResultSetStats message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
-                     * @param {google.spanner.v1.QueryPlan} message QueryPlan
+                     * @param {google.spanner.v1.ResultSetStats} message ResultSetStats
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    QueryPlan.toObject = function toObject(message, options) {
+                    ResultSetStats.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
-                        if (options.arrays || options.defaults)
-                            object.planNodes = [];
-                        if (message.planNodes && message.planNodes.length) {
-                            object.planNodes = [];
-                            for (var j = 0; j < message.planNodes.length; ++j)
-                                object.planNodes[j] = $root.google.spanner.v1.PlanNode.toObject(message.planNodes[j], options);
+                        if (options.defaults) {
+                            object.queryPlan = null;
+                            object.queryStats = null;
+                        }
+                        if (message.queryPlan != null && message.hasOwnProperty("queryPlan"))
+                            object.queryPlan = $root.google.spanner.v1.QueryPlan.toObject(message.queryPlan, options);
+                        if (message.queryStats != null && message.hasOwnProperty("queryStats"))
+                            object.queryStats = $root.google.protobuf.Struct.toObject(message.queryStats, options);
+                        if (message.rowCountExact != null && message.hasOwnProperty("rowCountExact")) {
+                            if (typeof message.rowCountExact === "number")
+                                object.rowCountExact = options.longs === String ? String(message.rowCountExact) : message.rowCountExact;
+                            else
+                                object.rowCountExact = options.longs === String ? $util.Long.prototype.toString.call(message.rowCountExact) : options.longs === Number ? new $util.LongBits(message.rowCountExact.low >>> 0, message.rowCountExact.high >>> 0).toNumber() : message.rowCountExact;
+                            if (options.oneofs)
+                                object.rowCount = "rowCountExact";
+                        }
+                        if (message.rowCountLowerBound != null && message.hasOwnProperty("rowCountLowerBound")) {
+                            if (typeof message.rowCountLowerBound === "number")
+                                object.rowCountLowerBound = options.longs === String ? String(message.rowCountLowerBound) : message.rowCountLowerBound;
+                            else
+                                object.rowCountLowerBound = options.longs === String ? $util.Long.prototype.toString.call(message.rowCountLowerBound) : options.longs === Number ? new $util.LongBits(message.rowCountLowerBound.low >>> 0, message.rowCountLowerBound.high >>> 0).toNumber() : message.rowCountLowerBound;
+                            if (options.oneofs)
+                                object.rowCount = "rowCountLowerBound";
                         }
                         return object;
                     };
     
                     /**
-                     * Converts this QueryPlan to JSON.
+                     * Converts this ResultSetStats to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    QueryPlan.prototype.toJSON = function toJSON() {
+                    ResultSetStats.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for QueryPlan
+                     * Gets the default type url for ResultSetStats
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.QueryPlan
+                     * @memberof google.spanner.v1.ResultSetStats
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    QueryPlan.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    ResultSetStats.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.QueryPlan";
+                        return typeUrlPrefix + "/google.spanner.v1.ResultSetStats";
                     };
     
-                    return QueryPlan;
+                    return ResultSetStats;
                 })();
     
-                v1.TransactionOptions = (function() {
+                v1.PlanNode = (function() {
     
                     /**
-                     * Properties of a TransactionOptions.
+                     * Properties of a PlanNode.
                      * @memberof google.spanner.v1
-                     * @interface ITransactionOptions
-                     * @property {google.spanner.v1.TransactionOptions.IReadWrite|null} [readWrite] TransactionOptions readWrite
-                     * @property {google.spanner.v1.TransactionOptions.IPartitionedDml|null} [partitionedDml] TransactionOptions partitionedDml
-                     * @property {google.spanner.v1.TransactionOptions.IReadOnly|null} [readOnly] TransactionOptions readOnly
-                     * @property {boolean|null} [excludeTxnFromChangeStreams] TransactionOptions excludeTxnFromChangeStreams
+                     * @interface IPlanNode
+                     * @property {number|null} [index] PlanNode index
+                     * @property {google.spanner.v1.PlanNode.Kind|null} [kind] PlanNode kind
+                     * @property {string|null} [displayName] PlanNode displayName
+                     * @property {Array.<google.spanner.v1.PlanNode.IChildLink>|null} [childLinks] PlanNode childLinks
+                     * @property {google.spanner.v1.PlanNode.IShortRepresentation|null} [shortRepresentation] PlanNode shortRepresentation
+                     * @property {google.protobuf.IStruct|null} [metadata] PlanNode metadata
+                     * @property {google.protobuf.IStruct|null} [executionStats] PlanNode executionStats
                      */
     
                     /**
-                     * Constructs a new TransactionOptions.
+                     * Constructs a new PlanNode.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a TransactionOptions.
-                     * @implements ITransactionOptions
+                     * @classdesc Represents a PlanNode.
+                     * @implements IPlanNode
                      * @constructor
-                     * @param {google.spanner.v1.ITransactionOptions=} [properties] Properties to set
+                     * @param {google.spanner.v1.IPlanNode=} [properties] Properties to set
                      */
-                    function TransactionOptions(properties) {
+                    function PlanNode(properties) {
+                        this.childLinks = [];
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -83890,131 +86002,162 @@
                     }
     
                     /**
-                     * TransactionOptions readWrite.
-                     * @member {google.spanner.v1.TransactionOptions.IReadWrite|null|undefined} readWrite
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * PlanNode index.
+                     * @member {number} index
+                     * @memberof google.spanner.v1.PlanNode
                      * @instance
                      */
-                    TransactionOptions.prototype.readWrite = null;
+                    PlanNode.prototype.index = 0;
     
                     /**
-                     * TransactionOptions partitionedDml.
-                     * @member {google.spanner.v1.TransactionOptions.IPartitionedDml|null|undefined} partitionedDml
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * PlanNode kind.
+                     * @member {google.spanner.v1.PlanNode.Kind} kind
+                     * @memberof google.spanner.v1.PlanNode
                      * @instance
                      */
-                    TransactionOptions.prototype.partitionedDml = null;
+                    PlanNode.prototype.kind = 0;
     
                     /**
-                     * TransactionOptions readOnly.
-                     * @member {google.spanner.v1.TransactionOptions.IReadOnly|null|undefined} readOnly
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * PlanNode displayName.
+                     * @member {string} displayName
+                     * @memberof google.spanner.v1.PlanNode
                      * @instance
                      */
-                    TransactionOptions.prototype.readOnly = null;
+                    PlanNode.prototype.displayName = "";
     
                     /**
-                     * TransactionOptions excludeTxnFromChangeStreams.
-                     * @member {boolean} excludeTxnFromChangeStreams
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * PlanNode childLinks.
+                     * @member {Array.<google.spanner.v1.PlanNode.IChildLink>} childLinks
+                     * @memberof google.spanner.v1.PlanNode
                      * @instance
                      */
-                    TransactionOptions.prototype.excludeTxnFromChangeStreams = false;
+                    PlanNode.prototype.childLinks = $util.emptyArray;
     
-                    // OneOf field names bound to virtual getters and setters
-                    var $oneOfFields;
+                    /**
+                     * PlanNode shortRepresentation.
+                     * @member {google.spanner.v1.PlanNode.IShortRepresentation|null|undefined} shortRepresentation
+                     * @memberof google.spanner.v1.PlanNode
+                     * @instance
+                     */
+                    PlanNode.prototype.shortRepresentation = null;
     
                     /**
-                     * TransactionOptions mode.
-                     * @member {"readWrite"|"partitionedDml"|"readOnly"|undefined} mode
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * PlanNode metadata.
+                     * @member {google.protobuf.IStruct|null|undefined} metadata
+                     * @memberof google.spanner.v1.PlanNode
                      * @instance
                      */
-                    Object.defineProperty(TransactionOptions.prototype, "mode", {
-                        get: $util.oneOfGetter($oneOfFields = ["readWrite", "partitionedDml", "readOnly"]),
-                        set: $util.oneOfSetter($oneOfFields)
-                    });
+                    PlanNode.prototype.metadata = null;
     
                     /**
-                     * Creates a new TransactionOptions instance using the specified properties.
+                     * PlanNode executionStats.
+                     * @member {google.protobuf.IStruct|null|undefined} executionStats
+                     * @memberof google.spanner.v1.PlanNode
+                     * @instance
+                     */
+                    PlanNode.prototype.executionStats = null;
+    
+                    /**
+                     * Creates a new PlanNode instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
-                     * @param {google.spanner.v1.ITransactionOptions=} [properties] Properties to set
-                     * @returns {google.spanner.v1.TransactionOptions} TransactionOptions instance
+                     * @param {google.spanner.v1.IPlanNode=} [properties] Properties to set
+                     * @returns {google.spanner.v1.PlanNode} PlanNode instance
                      */
-                    TransactionOptions.create = function create(properties) {
-                        return new TransactionOptions(properties);
+                    PlanNode.create = function create(properties) {
+                        return new PlanNode(properties);
                     };
     
                     /**
-                     * Encodes the specified TransactionOptions message. Does not implicitly {@link google.spanner.v1.TransactionOptions.verify|verify} messages.
+                     * Encodes the specified PlanNode message. Does not implicitly {@link google.spanner.v1.PlanNode.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
-                     * @param {google.spanner.v1.ITransactionOptions} message TransactionOptions message or plain object to encode
+                     * @param {google.spanner.v1.IPlanNode} message PlanNode message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    TransactionOptions.encode = function encode(message, writer) {
+                    PlanNode.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.readWrite != null && Object.hasOwnProperty.call(message, "readWrite"))
-                            $root.google.spanner.v1.TransactionOptions.ReadWrite.encode(message.readWrite, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.readOnly != null && Object.hasOwnProperty.call(message, "readOnly"))
-                            $root.google.spanner.v1.TransactionOptions.ReadOnly.encode(message.readOnly, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        if (message.partitionedDml != null && Object.hasOwnProperty.call(message, "partitionedDml"))
-                            $root.google.spanner.v1.TransactionOptions.PartitionedDml.encode(message.partitionedDml, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
-                        if (message.excludeTxnFromChangeStreams != null && Object.hasOwnProperty.call(message, "excludeTxnFromChangeStreams"))
-                            writer.uint32(/* id 5, wireType 0 =*/40).bool(message.excludeTxnFromChangeStreams);
+                        if (message.index != null && Object.hasOwnProperty.call(message, "index"))
+                            writer.uint32(/* id 1, wireType 0 =*/8).int32(message.index);
+                        if (message.kind != null && Object.hasOwnProperty.call(message, "kind"))
+                            writer.uint32(/* id 2, wireType 0 =*/16).int32(message.kind);
+                        if (message.displayName != null && Object.hasOwnProperty.call(message, "displayName"))
+                            writer.uint32(/* id 3, wireType 2 =*/26).string(message.displayName);
+                        if (message.childLinks != null && message.childLinks.length)
+                            for (var i = 0; i < message.childLinks.length; ++i)
+                                $root.google.spanner.v1.PlanNode.ChildLink.encode(message.childLinks[i], writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
+                        if (message.shortRepresentation != null && Object.hasOwnProperty.call(message, "shortRepresentation"))
+                            $root.google.spanner.v1.PlanNode.ShortRepresentation.encode(message.shortRepresentation, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
+                        if (message.metadata != null && Object.hasOwnProperty.call(message, "metadata"))
+                            $root.google.protobuf.Struct.encode(message.metadata, writer.uint32(/* id 6, wireType 2 =*/50).fork()).ldelim();
+                        if (message.executionStats != null && Object.hasOwnProperty.call(message, "executionStats"))
+                            $root.google.protobuf.Struct.encode(message.executionStats, writer.uint32(/* id 7, wireType 2 =*/58).fork()).ldelim();
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified TransactionOptions message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.verify|verify} messages.
+                     * Encodes the specified PlanNode message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
-                     * @param {google.spanner.v1.ITransactionOptions} message TransactionOptions message or plain object to encode
+                     * @param {google.spanner.v1.IPlanNode} message PlanNode message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    TransactionOptions.encodeDelimited = function encodeDelimited(message, writer) {
+                    PlanNode.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a TransactionOptions message from the specified reader or buffer.
+                     * Decodes a PlanNode message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.TransactionOptions} TransactionOptions
+                     * @returns {google.spanner.v1.PlanNode} PlanNode
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    TransactionOptions.decode = function decode(reader, length) {
+                    PlanNode.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionOptions();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.PlanNode();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    message.readWrite = $root.google.spanner.v1.TransactionOptions.ReadWrite.decode(reader, reader.uint32());
+                                    message.index = reader.int32();
+                                    break;
+                                }
+                            case 2: {
+                                    message.kind = reader.int32();
                                     break;
                                 }
                             case 3: {
-                                    message.partitionedDml = $root.google.spanner.v1.TransactionOptions.PartitionedDml.decode(reader, reader.uint32());
+                                    message.displayName = reader.string();
                                     break;
                                 }
-                            case 2: {
-                                    message.readOnly = $root.google.spanner.v1.TransactionOptions.ReadOnly.decode(reader, reader.uint32());
+                            case 4: {
+                                    if (!(message.childLinks && message.childLinks.length))
+                                        message.childLinks = [];
+                                    message.childLinks.push($root.google.spanner.v1.PlanNode.ChildLink.decode(reader, reader.uint32()));
                                     break;
                                 }
                             case 5: {
-                                    message.excludeTxnFromChangeStreams = reader.bool();
+                                    message.shortRepresentation = $root.google.spanner.v1.PlanNode.ShortRepresentation.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 6: {
+                                    message.metadata = $root.google.protobuf.Struct.decode(reader, reader.uint32());
+                                    break;
+                                }
+                            case 7: {
+                                    message.executionStats = $root.google.protobuf.Struct.decode(reader, reader.uint32());
                                     break;
                                 }
                             default:
@@ -84026,420 +86169,243 @@
                     };
     
                     /**
-                     * Decodes a TransactionOptions message from the specified reader or buffer, length delimited.
+                     * Decodes a PlanNode message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.TransactionOptions} TransactionOptions
+                     * @returns {google.spanner.v1.PlanNode} PlanNode
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    TransactionOptions.decodeDelimited = function decodeDelimited(reader) {
+                    PlanNode.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a TransactionOptions message.
+                     * Verifies a PlanNode message.
                      * @function verify
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    TransactionOptions.verify = function verify(message) {
+                    PlanNode.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
-                        var properties = {};
-                        if (message.readWrite != null && message.hasOwnProperty("readWrite")) {
-                            properties.mode = 1;
-                            {
-                                var error = $root.google.spanner.v1.TransactionOptions.ReadWrite.verify(message.readWrite);
-                                if (error)
-                                    return "readWrite." + error;
+                        if (message.index != null && message.hasOwnProperty("index"))
+                            if (!$util.isInteger(message.index))
+                                return "index: integer expected";
+                        if (message.kind != null && message.hasOwnProperty("kind"))
+                            switch (message.kind) {
+                            default:
+                                return "kind: enum value expected";
+                            case 0:
+                            case 1:
+                            case 2:
+                                break;
                             }
-                        }
-                        if (message.partitionedDml != null && message.hasOwnProperty("partitionedDml")) {
-                            if (properties.mode === 1)
-                                return "mode: multiple values";
-                            properties.mode = 1;
-                            {
-                                var error = $root.google.spanner.v1.TransactionOptions.PartitionedDml.verify(message.partitionedDml);
+                        if (message.displayName != null && message.hasOwnProperty("displayName"))
+                            if (!$util.isString(message.displayName))
+                                return "displayName: string expected";
+                        if (message.childLinks != null && message.hasOwnProperty("childLinks")) {
+                            if (!Array.isArray(message.childLinks))
+                                return "childLinks: array expected";
+                            for (var i = 0; i < message.childLinks.length; ++i) {
+                                var error = $root.google.spanner.v1.PlanNode.ChildLink.verify(message.childLinks[i]);
                                 if (error)
-                                    return "partitionedDml." + error;
+                                    return "childLinks." + error;
                             }
                         }
-                        if (message.readOnly != null && message.hasOwnProperty("readOnly")) {
-                            if (properties.mode === 1)
-                                return "mode: multiple values";
-                            properties.mode = 1;
-                            {
-                                var error = $root.google.spanner.v1.TransactionOptions.ReadOnly.verify(message.readOnly);
-                                if (error)
-                                    return "readOnly." + error;
-                            }
+                        if (message.shortRepresentation != null && message.hasOwnProperty("shortRepresentation")) {
+                            var error = $root.google.spanner.v1.PlanNode.ShortRepresentation.verify(message.shortRepresentation);
+                            if (error)
+                                return "shortRepresentation." + error;
+                        }
+                        if (message.metadata != null && message.hasOwnProperty("metadata")) {
+                            var error = $root.google.protobuf.Struct.verify(message.metadata);
+                            if (error)
+                                return "metadata." + error;
+                        }
+                        if (message.executionStats != null && message.hasOwnProperty("executionStats")) {
+                            var error = $root.google.protobuf.Struct.verify(message.executionStats);
+                            if (error)
+                                return "executionStats." + error;
                         }
-                        if (message.excludeTxnFromChangeStreams != null && message.hasOwnProperty("excludeTxnFromChangeStreams"))
-                            if (typeof message.excludeTxnFromChangeStreams !== "boolean")
-                                return "excludeTxnFromChangeStreams: boolean expected";
                         return null;
                     };
     
                     /**
-                     * Creates a TransactionOptions message from a plain object. Also converts values to their respective internal types.
+                     * Creates a PlanNode message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.TransactionOptions} TransactionOptions
+                     * @returns {google.spanner.v1.PlanNode} PlanNode
                      */
-                    TransactionOptions.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.TransactionOptions)
+                    PlanNode.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.PlanNode)
                             return object;
-                        var message = new $root.google.spanner.v1.TransactionOptions();
-                        if (object.readWrite != null) {
-                            if (typeof object.readWrite !== "object")
-                                throw TypeError(".google.spanner.v1.TransactionOptions.readWrite: object expected");
-                            message.readWrite = $root.google.spanner.v1.TransactionOptions.ReadWrite.fromObject(object.readWrite);
+                        var message = new $root.google.spanner.v1.PlanNode();
+                        if (object.index != null)
+                            message.index = object.index | 0;
+                        switch (object.kind) {
+                        default:
+                            if (typeof object.kind === "number") {
+                                message.kind = object.kind;
+                                break;
+                            }
+                            break;
+                        case "KIND_UNSPECIFIED":
+                        case 0:
+                            message.kind = 0;
+                            break;
+                        case "RELATIONAL":
+                        case 1:
+                            message.kind = 1;
+                            break;
+                        case "SCALAR":
+                        case 2:
+                            message.kind = 2;
+                            break;
                         }
-                        if (object.partitionedDml != null) {
-                            if (typeof object.partitionedDml !== "object")
-                                throw TypeError(".google.spanner.v1.TransactionOptions.partitionedDml: object expected");
-                            message.partitionedDml = $root.google.spanner.v1.TransactionOptions.PartitionedDml.fromObject(object.partitionedDml);
+                        if (object.displayName != null)
+                            message.displayName = String(object.displayName);
+                        if (object.childLinks) {
+                            if (!Array.isArray(object.childLinks))
+                                throw TypeError(".google.spanner.v1.PlanNode.childLinks: array expected");
+                            message.childLinks = [];
+                            for (var i = 0; i < object.childLinks.length; ++i) {
+                                if (typeof object.childLinks[i] !== "object")
+                                    throw TypeError(".google.spanner.v1.PlanNode.childLinks: object expected");
+                                message.childLinks[i] = $root.google.spanner.v1.PlanNode.ChildLink.fromObject(object.childLinks[i]);
+                            }
                         }
-                        if (object.readOnly != null) {
-                            if (typeof object.readOnly !== "object")
-                                throw TypeError(".google.spanner.v1.TransactionOptions.readOnly: object expected");
-                            message.readOnly = $root.google.spanner.v1.TransactionOptions.ReadOnly.fromObject(object.readOnly);
+                        if (object.shortRepresentation != null) {
+                            if (typeof object.shortRepresentation !== "object")
+                                throw TypeError(".google.spanner.v1.PlanNode.shortRepresentation: object expected");
+                            message.shortRepresentation = $root.google.spanner.v1.PlanNode.ShortRepresentation.fromObject(object.shortRepresentation);
+                        }
+                        if (object.metadata != null) {
+                            if (typeof object.metadata !== "object")
+                                throw TypeError(".google.spanner.v1.PlanNode.metadata: object expected");
+                            message.metadata = $root.google.protobuf.Struct.fromObject(object.metadata);
+                        }
+                        if (object.executionStats != null) {
+                            if (typeof object.executionStats !== "object")
+                                throw TypeError(".google.spanner.v1.PlanNode.executionStats: object expected");
+                            message.executionStats = $root.google.protobuf.Struct.fromObject(object.executionStats);
                         }
-                        if (object.excludeTxnFromChangeStreams != null)
-                            message.excludeTxnFromChangeStreams = Boolean(object.excludeTxnFromChangeStreams);
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a TransactionOptions message. Also converts values to other types if specified.
+                     * Creates a plain object from a PlanNode message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
-                     * @param {google.spanner.v1.TransactionOptions} message TransactionOptions
+                     * @param {google.spanner.v1.PlanNode} message PlanNode
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    TransactionOptions.toObject = function toObject(message, options) {
+                    PlanNode.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
-                        if (options.defaults)
-                            object.excludeTxnFromChangeStreams = false;
-                        if (message.readWrite != null && message.hasOwnProperty("readWrite")) {
-                            object.readWrite = $root.google.spanner.v1.TransactionOptions.ReadWrite.toObject(message.readWrite, options);
-                            if (options.oneofs)
-                                object.mode = "readWrite";
-                        }
-                        if (message.readOnly != null && message.hasOwnProperty("readOnly")) {
-                            object.readOnly = $root.google.spanner.v1.TransactionOptions.ReadOnly.toObject(message.readOnly, options);
-                            if (options.oneofs)
-                                object.mode = "readOnly";
+                        if (options.arrays || options.defaults)
+                            object.childLinks = [];
+                        if (options.defaults) {
+                            object.index = 0;
+                            object.kind = options.enums === String ? "KIND_UNSPECIFIED" : 0;
+                            object.displayName = "";
+                            object.shortRepresentation = null;
+                            object.metadata = null;
+                            object.executionStats = null;
                         }
-                        if (message.partitionedDml != null && message.hasOwnProperty("partitionedDml")) {
-                            object.partitionedDml = $root.google.spanner.v1.TransactionOptions.PartitionedDml.toObject(message.partitionedDml, options);
-                            if (options.oneofs)
-                                object.mode = "partitionedDml";
+                        if (message.index != null && message.hasOwnProperty("index"))
+                            object.index = message.index;
+                        if (message.kind != null && message.hasOwnProperty("kind"))
+                            object.kind = options.enums === String ? $root.google.spanner.v1.PlanNode.Kind[message.kind] === undefined ? message.kind : $root.google.spanner.v1.PlanNode.Kind[message.kind] : message.kind;
+                        if (message.displayName != null && message.hasOwnProperty("displayName"))
+                            object.displayName = message.displayName;
+                        if (message.childLinks && message.childLinks.length) {
+                            object.childLinks = [];
+                            for (var j = 0; j < message.childLinks.length; ++j)
+                                object.childLinks[j] = $root.google.spanner.v1.PlanNode.ChildLink.toObject(message.childLinks[j], options);
                         }
-                        if (message.excludeTxnFromChangeStreams != null && message.hasOwnProperty("excludeTxnFromChangeStreams"))
-                            object.excludeTxnFromChangeStreams = message.excludeTxnFromChangeStreams;
+                        if (message.shortRepresentation != null && message.hasOwnProperty("shortRepresentation"))
+                            object.shortRepresentation = $root.google.spanner.v1.PlanNode.ShortRepresentation.toObject(message.shortRepresentation, options);
+                        if (message.metadata != null && message.hasOwnProperty("metadata"))
+                            object.metadata = $root.google.protobuf.Struct.toObject(message.metadata, options);
+                        if (message.executionStats != null && message.hasOwnProperty("executionStats"))
+                            object.executionStats = $root.google.protobuf.Struct.toObject(message.executionStats, options);
                         return object;
                     };
     
                     /**
-                     * Converts this TransactionOptions to JSON.
+                     * Converts this PlanNode to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    TransactionOptions.prototype.toJSON = function toJSON() {
+                    PlanNode.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for TransactionOptions
+                     * Gets the default type url for PlanNode
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.TransactionOptions
+                     * @memberof google.spanner.v1.PlanNode
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    TransactionOptions.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    PlanNode.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.TransactionOptions";
+                        return typeUrlPrefix + "/google.spanner.v1.PlanNode";
                     };
     
-                    TransactionOptions.ReadWrite = (function() {
-    
-                        /**
-                         * Properties of a ReadWrite.
-                         * @memberof google.spanner.v1.TransactionOptions
-                         * @interface IReadWrite
-                         * @property {google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode|null} [readLockMode] ReadWrite readLockMode
-                         */
-    
-                        /**
-                         * Constructs a new ReadWrite.
-                         * @memberof google.spanner.v1.TransactionOptions
-                         * @classdesc Represents a ReadWrite.
-                         * @implements IReadWrite
-                         * @constructor
-                         * @param {google.spanner.v1.TransactionOptions.IReadWrite=} [properties] Properties to set
-                         */
-                        function ReadWrite(properties) {
-                            if (properties)
-                                for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                    if (properties[keys[i]] != null)
-                                        this[keys[i]] = properties[keys[i]];
-                        }
-    
-                        /**
-                         * ReadWrite readLockMode.
-                         * @member {google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode} readLockMode
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @instance
-                         */
-                        ReadWrite.prototype.readLockMode = 0;
-    
-                        /**
-                         * Creates a new ReadWrite instance using the specified properties.
-                         * @function create
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {google.spanner.v1.TransactionOptions.IReadWrite=} [properties] Properties to set
-                         * @returns {google.spanner.v1.TransactionOptions.ReadWrite} ReadWrite instance
-                         */
-                        ReadWrite.create = function create(properties) {
-                            return new ReadWrite(properties);
-                        };
-    
-                        /**
-                         * Encodes the specified ReadWrite message. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadWrite.verify|verify} messages.
-                         * @function encode
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {google.spanner.v1.TransactionOptions.IReadWrite} message ReadWrite message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        ReadWrite.encode = function encode(message, writer) {
-                            if (!writer)
-                                writer = $Writer.create();
-                            if (message.readLockMode != null && Object.hasOwnProperty.call(message, "readLockMode"))
-                                writer.uint32(/* id 1, wireType 0 =*/8).int32(message.readLockMode);
-                            return writer;
-                        };
-    
-                        /**
-                         * Encodes the specified ReadWrite message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadWrite.verify|verify} messages.
-                         * @function encodeDelimited
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {google.spanner.v1.TransactionOptions.IReadWrite} message ReadWrite message or plain object to encode
-                         * @param {$protobuf.Writer} [writer] Writer to encode to
-                         * @returns {$protobuf.Writer} Writer
-                         */
-                        ReadWrite.encodeDelimited = function encodeDelimited(message, writer) {
-                            return this.encode(message, writer).ldelim();
-                        };
-    
-                        /**
-                         * Decodes a ReadWrite message from the specified reader or buffer.
-                         * @function decode
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @param {number} [length] Message length if known beforehand
-                         * @returns {google.spanner.v1.TransactionOptions.ReadWrite} ReadWrite
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        ReadWrite.decode = function decode(reader, length) {
-                            if (!(reader instanceof $Reader))
-                                reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionOptions.ReadWrite();
-                            while (reader.pos < end) {
-                                var tag = reader.uint32();
-                                switch (tag >>> 3) {
-                                case 1: {
-                                        message.readLockMode = reader.int32();
-                                        break;
-                                    }
-                                default:
-                                    reader.skipType(tag & 7);
-                                    break;
-                                }
-                            }
-                            return message;
-                        };
-    
-                        /**
-                         * Decodes a ReadWrite message from the specified reader or buffer, length delimited.
-                         * @function decodeDelimited
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.spanner.v1.TransactionOptions.ReadWrite} ReadWrite
-                         * @throws {Error} If the payload is not a reader or valid buffer
-                         * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                         */
-                        ReadWrite.decodeDelimited = function decodeDelimited(reader) {
-                            if (!(reader instanceof $Reader))
-                                reader = new $Reader(reader);
-                            return this.decode(reader, reader.uint32());
-                        };
-    
-                        /**
-                         * Verifies a ReadWrite message.
-                         * @function verify
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {Object.<string,*>} message Plain object to verify
-                         * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                         */
-                        ReadWrite.verify = function verify(message) {
-                            if (typeof message !== "object" || message === null)
-                                return "object expected";
-                            if (message.readLockMode != null && message.hasOwnProperty("readLockMode"))
-                                switch (message.readLockMode) {
-                                default:
-                                    return "readLockMode: enum value expected";
-                                case 0:
-                                case 1:
-                                case 2:
-                                    break;
-                                }
-                            return null;
-                        };
-    
-                        /**
-                         * Creates a ReadWrite message from a plain object. Also converts values to their respective internal types.
-                         * @function fromObject
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {Object.<string,*>} object Plain object
-                         * @returns {google.spanner.v1.TransactionOptions.ReadWrite} ReadWrite
-                         */
-                        ReadWrite.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.spanner.v1.TransactionOptions.ReadWrite)
-                                return object;
-                            var message = new $root.google.spanner.v1.TransactionOptions.ReadWrite();
-                            switch (object.readLockMode) {
-                            default:
-                                if (typeof object.readLockMode === "number") {
-                                    message.readLockMode = object.readLockMode;
-                                    break;
-                                }
-                                break;
-                            case "READ_LOCK_MODE_UNSPECIFIED":
-                            case 0:
-                                message.readLockMode = 0;
-                                break;
-                            case "PESSIMISTIC":
-                            case 1:
-                                message.readLockMode = 1;
-                                break;
-                            case "OPTIMISTIC":
-                            case 2:
-                                message.readLockMode = 2;
-                                break;
-                            }
-                            return message;
-                        };
-    
-                        /**
-                         * Creates a plain object from a ReadWrite message. Also converts values to other types if specified.
-                         * @function toObject
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {google.spanner.v1.TransactionOptions.ReadWrite} message ReadWrite
-                         * @param {$protobuf.IConversionOptions} [options] Conversion options
-                         * @returns {Object.<string,*>} Plain object
-                         */
-                        ReadWrite.toObject = function toObject(message, options) {
-                            if (!options)
-                                options = {};
-                            var object = {};
-                            if (options.defaults)
-                                object.readLockMode = options.enums === String ? "READ_LOCK_MODE_UNSPECIFIED" : 0;
-                            if (message.readLockMode != null && message.hasOwnProperty("readLockMode"))
-                                object.readLockMode = options.enums === String ? $root.google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode[message.readLockMode] === undefined ? message.readLockMode : $root.google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode[message.readLockMode] : message.readLockMode;
-                            return object;
-                        };
-    
-                        /**
-                         * Converts this ReadWrite to JSON.
-                         * @function toJSON
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @instance
-                         * @returns {Object.<string,*>} JSON object
-                         */
-                        ReadWrite.prototype.toJSON = function toJSON() {
-                            return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                        };
-    
-                        /**
-                         * Gets the default type url for ReadWrite
-                         * @function getTypeUrl
-                         * @memberof google.spanner.v1.TransactionOptions.ReadWrite
-                         * @static
-                         * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                         * @returns {string} The default type url
-                         */
-                        ReadWrite.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                            if (typeUrlPrefix === undefined) {
-                                typeUrlPrefix = "type.googleapis.com";
-                            }
-                            return typeUrlPrefix + "/google.spanner.v1.TransactionOptions.ReadWrite";
-                        };
-    
-                        /**
-                         * ReadLockMode enum.
-                         * @name google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode
-                         * @enum {number}
-                         * @property {number} READ_LOCK_MODE_UNSPECIFIED=0 READ_LOCK_MODE_UNSPECIFIED value
-                         * @property {number} PESSIMISTIC=1 PESSIMISTIC value
-                         * @property {number} OPTIMISTIC=2 OPTIMISTIC value
-                         */
-                        ReadWrite.ReadLockMode = (function() {
-                            var valuesById = {}, values = Object.create(valuesById);
-                            values[valuesById[0] = "READ_LOCK_MODE_UNSPECIFIED"] = 0;
-                            values[valuesById[1] = "PESSIMISTIC"] = 1;
-                            values[valuesById[2] = "OPTIMISTIC"] = 2;
-                            return values;
-                        })();
-    
-                        return ReadWrite;
+                    /**
+                     * Kind enum.
+                     * @name google.spanner.v1.PlanNode.Kind
+                     * @enum {number}
+                     * @property {number} KIND_UNSPECIFIED=0 KIND_UNSPECIFIED value
+                     * @property {number} RELATIONAL=1 RELATIONAL value
+                     * @property {number} SCALAR=2 SCALAR value
+                     */
+                    PlanNode.Kind = (function() {
+                        var valuesById = {}, values = Object.create(valuesById);
+                        values[valuesById[0] = "KIND_UNSPECIFIED"] = 0;
+                        values[valuesById[1] = "RELATIONAL"] = 1;
+                        values[valuesById[2] = "SCALAR"] = 2;
+                        return values;
                     })();
     
-                    TransactionOptions.PartitionedDml = (function() {
+                    PlanNode.ChildLink = (function() {
     
                         /**
-                         * Properties of a PartitionedDml.
-                         * @memberof google.spanner.v1.TransactionOptions
-                         * @interface IPartitionedDml
+                         * Properties of a ChildLink.
+                         * @memberof google.spanner.v1.PlanNode
+                         * @interface IChildLink
+                         * @property {number|null} [childIndex] ChildLink childIndex
+                         * @property {string|null} [type] ChildLink type
+                         * @property {string|null} [variable] ChildLink variable
                          */
     
                         /**
-                         * Constructs a new PartitionedDml.
-                         * @memberof google.spanner.v1.TransactionOptions
-                         * @classdesc Represents a PartitionedDml.
-                         * @implements IPartitionedDml
+                         * Constructs a new ChildLink.
+                         * @memberof google.spanner.v1.PlanNode
+                         * @classdesc Represents a ChildLink.
+                         * @implements IChildLink
                          * @constructor
-                         * @param {google.spanner.v1.TransactionOptions.IPartitionedDml=} [properties] Properties to set
+                         * @param {google.spanner.v1.PlanNode.IChildLink=} [properties] Properties to set
                          */
-                        function PartitionedDml(properties) {
+                        function ChildLink(properties) {
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -84447,63 +86413,105 @@
                         }
     
                         /**
-                         * Creates a new PartitionedDml instance using the specified properties.
+                         * ChildLink childIndex.
+                         * @member {number} childIndex
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
+                         * @instance
+                         */
+                        ChildLink.prototype.childIndex = 0;
+    
+                        /**
+                         * ChildLink type.
+                         * @member {string} type
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
+                         * @instance
+                         */
+                        ChildLink.prototype.type = "";
+    
+                        /**
+                         * ChildLink variable.
+                         * @member {string} variable
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
+                         * @instance
+                         */
+                        ChildLink.prototype.variable = "";
+    
+                        /**
+                         * Creates a new ChildLink instance using the specified properties.
                          * @function create
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
-                         * @param {google.spanner.v1.TransactionOptions.IPartitionedDml=} [properties] Properties to set
-                         * @returns {google.spanner.v1.TransactionOptions.PartitionedDml} PartitionedDml instance
+                         * @param {google.spanner.v1.PlanNode.IChildLink=} [properties] Properties to set
+                         * @returns {google.spanner.v1.PlanNode.ChildLink} ChildLink instance
                          */
-                        PartitionedDml.create = function create(properties) {
-                            return new PartitionedDml(properties);
+                        ChildLink.create = function create(properties) {
+                            return new ChildLink(properties);
                         };
     
                         /**
-                         * Encodes the specified PartitionedDml message. Does not implicitly {@link google.spanner.v1.TransactionOptions.PartitionedDml.verify|verify} messages.
+                         * Encodes the specified ChildLink message. Does not implicitly {@link google.spanner.v1.PlanNode.ChildLink.verify|verify} messages.
                          * @function encode
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
-                         * @param {google.spanner.v1.TransactionOptions.IPartitionedDml} message PartitionedDml message or plain object to encode
+                         * @param {google.spanner.v1.PlanNode.IChildLink} message ChildLink message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PartitionedDml.encode = function encode(message, writer) {
+                        ChildLink.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
+                            if (message.childIndex != null && Object.hasOwnProperty.call(message, "childIndex"))
+                                writer.uint32(/* id 1, wireType 0 =*/8).int32(message.childIndex);
+                            if (message.type != null && Object.hasOwnProperty.call(message, "type"))
+                                writer.uint32(/* id 2, wireType 2 =*/18).string(message.type);
+                            if (message.variable != null && Object.hasOwnProperty.call(message, "variable"))
+                                writer.uint32(/* id 3, wireType 2 =*/26).string(message.variable);
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified PartitionedDml message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.PartitionedDml.verify|verify} messages.
+                         * Encodes the specified ChildLink message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.ChildLink.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
-                         * @param {google.spanner.v1.TransactionOptions.IPartitionedDml} message PartitionedDml message or plain object to encode
+                         * @param {google.spanner.v1.PlanNode.IChildLink} message ChildLink message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        PartitionedDml.encodeDelimited = function encodeDelimited(message, writer) {
+                        ChildLink.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a PartitionedDml message from the specified reader or buffer.
+                         * Decodes a ChildLink message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.spanner.v1.TransactionOptions.PartitionedDml} PartitionedDml
+                         * @returns {google.spanner.v1.PlanNode.ChildLink} ChildLink
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PartitionedDml.decode = function decode(reader, length) {
+                        ChildLink.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionOptions.PartitionedDml();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.PlanNode.ChildLink();
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
+                                case 1: {
+                                        message.childIndex = reader.int32();
+                                        break;
+                                    }
+                                case 2: {
+                                        message.type = reader.string();
+                                        break;
+                                    }
+                                case 3: {
+                                        message.variable = reader.string();
+                                        break;
+                                    }
                                 default:
                                     reader.skipType(tag & 7);
                                     break;
@@ -84513,114 +86521,141 @@
                         };
     
                         /**
-                         * Decodes a PartitionedDml message from the specified reader or buffer, length delimited.
+                         * Decodes a ChildLink message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.spanner.v1.TransactionOptions.PartitionedDml} PartitionedDml
+                         * @returns {google.spanner.v1.PlanNode.ChildLink} ChildLink
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        PartitionedDml.decodeDelimited = function decodeDelimited(reader) {
+                        ChildLink.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a PartitionedDml message.
+                         * Verifies a ChildLink message.
                          * @function verify
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        PartitionedDml.verify = function verify(message) {
+                        ChildLink.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
+                            if (message.childIndex != null && message.hasOwnProperty("childIndex"))
+                                if (!$util.isInteger(message.childIndex))
+                                    return "childIndex: integer expected";
+                            if (message.type != null && message.hasOwnProperty("type"))
+                                if (!$util.isString(message.type))
+                                    return "type: string expected";
+                            if (message.variable != null && message.hasOwnProperty("variable"))
+                                if (!$util.isString(message.variable))
+                                    return "variable: string expected";
                             return null;
                         };
     
                         /**
-                         * Creates a PartitionedDml message from a plain object. Also converts values to their respective internal types.
+                         * Creates a ChildLink message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.spanner.v1.TransactionOptions.PartitionedDml} PartitionedDml
+                         * @returns {google.spanner.v1.PlanNode.ChildLink} ChildLink
                          */
-                        PartitionedDml.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.spanner.v1.TransactionOptions.PartitionedDml)
+                        ChildLink.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.spanner.v1.PlanNode.ChildLink)
                                 return object;
-                            return new $root.google.spanner.v1.TransactionOptions.PartitionedDml();
+                            var message = new $root.google.spanner.v1.PlanNode.ChildLink();
+                            if (object.childIndex != null)
+                                message.childIndex = object.childIndex | 0;
+                            if (object.type != null)
+                                message.type = String(object.type);
+                            if (object.variable != null)
+                                message.variable = String(object.variable);
+                            return message;
                         };
     
                         /**
-                         * Creates a plain object from a PartitionedDml message. Also converts values to other types if specified.
+                         * Creates a plain object from a ChildLink message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
-                         * @param {google.spanner.v1.TransactionOptions.PartitionedDml} message PartitionedDml
+                         * @param {google.spanner.v1.PlanNode.ChildLink} message ChildLink
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        PartitionedDml.toObject = function toObject() {
-                            return {};
+                        ChildLink.toObject = function toObject(message, options) {
+                            if (!options)
+                                options = {};
+                            var object = {};
+                            if (options.defaults) {
+                                object.childIndex = 0;
+                                object.type = "";
+                                object.variable = "";
+                            }
+                            if (message.childIndex != null && message.hasOwnProperty("childIndex"))
+                                object.childIndex = message.childIndex;
+                            if (message.type != null && message.hasOwnProperty("type"))
+                                object.type = message.type;
+                            if (message.variable != null && message.hasOwnProperty("variable"))
+                                object.variable = message.variable;
+                            return object;
                         };
     
                         /**
-                         * Converts this PartitionedDml to JSON.
+                         * Converts this ChildLink to JSON.
                          * @function toJSON
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        PartitionedDml.prototype.toJSON = function toJSON() {
+                        ChildLink.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for PartitionedDml
+                         * Gets the default type url for ChildLink
                          * @function getTypeUrl
-                         * @memberof google.spanner.v1.TransactionOptions.PartitionedDml
+                         * @memberof google.spanner.v1.PlanNode.ChildLink
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        PartitionedDml.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ChildLink.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.spanner.v1.TransactionOptions.PartitionedDml";
+                            return typeUrlPrefix + "/google.spanner.v1.PlanNode.ChildLink";
                         };
     
-                        return PartitionedDml;
+                        return ChildLink;
                     })();
     
-                    TransactionOptions.ReadOnly = (function() {
+                    PlanNode.ShortRepresentation = (function() {
     
                         /**
-                         * Properties of a ReadOnly.
-                         * @memberof google.spanner.v1.TransactionOptions
-                         * @interface IReadOnly
-                         * @property {boolean|null} [strong] ReadOnly strong
-                         * @property {google.protobuf.ITimestamp|null} [minReadTimestamp] ReadOnly minReadTimestamp
-                         * @property {google.protobuf.IDuration|null} [maxStaleness] ReadOnly maxStaleness
-                         * @property {google.protobuf.ITimestamp|null} [readTimestamp] ReadOnly readTimestamp
-                         * @property {google.protobuf.IDuration|null} [exactStaleness] ReadOnly exactStaleness
-                         * @property {boolean|null} [returnReadTimestamp] ReadOnly returnReadTimestamp
+                         * Properties of a ShortRepresentation.
+                         * @memberof google.spanner.v1.PlanNode
+                         * @interface IShortRepresentation
+                         * @property {string|null} [description] ShortRepresentation description
+                         * @property {Object.<string,number>|null} [subqueries] ShortRepresentation subqueries
                          */
     
                         /**
-                         * Constructs a new ReadOnly.
-                         * @memberof google.spanner.v1.TransactionOptions
-                         * @classdesc Represents a ReadOnly.
-                         * @implements IReadOnly
+                         * Constructs a new ShortRepresentation.
+                         * @memberof google.spanner.v1.PlanNode
+                         * @classdesc Represents a ShortRepresentation.
+                         * @implements IShortRepresentation
                          * @constructor
-                         * @param {google.spanner.v1.TransactionOptions.IReadOnly=} [properties] Properties to set
+                         * @param {google.spanner.v1.PlanNode.IShortRepresentation=} [properties] Properties to set
                          */
-                        function ReadOnly(properties) {
+                        function ShortRepresentation(properties) {
+                            this.subqueries = {};
                             if (properties)
                                 for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                     if (properties[keys[i]] != null)
@@ -84628,159 +86663,109 @@
                         }
     
                         /**
-                         * ReadOnly strong.
-                         * @member {boolean|null|undefined} strong
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
-                         * @instance
-                         */
-                        ReadOnly.prototype.strong = null;
-    
-                        /**
-                         * ReadOnly minReadTimestamp.
-                         * @member {google.protobuf.ITimestamp|null|undefined} minReadTimestamp
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
-                         * @instance
-                         */
-                        ReadOnly.prototype.minReadTimestamp = null;
-    
-                        /**
-                         * ReadOnly maxStaleness.
-                         * @member {google.protobuf.IDuration|null|undefined} maxStaleness
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
-                         * @instance
-                         */
-                        ReadOnly.prototype.maxStaleness = null;
-    
-                        /**
-                         * ReadOnly readTimestamp.
-                         * @member {google.protobuf.ITimestamp|null|undefined} readTimestamp
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
-                         * @instance
-                         */
-                        ReadOnly.prototype.readTimestamp = null;
-    
-                        /**
-                         * ReadOnly exactStaleness.
-                         * @member {google.protobuf.IDuration|null|undefined} exactStaleness
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
-                         * @instance
-                         */
-                        ReadOnly.prototype.exactStaleness = null;
-    
-                        /**
-                         * ReadOnly returnReadTimestamp.
-                         * @member {boolean} returnReadTimestamp
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * ShortRepresentation description.
+                         * @member {string} description
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @instance
                          */
-                        ReadOnly.prototype.returnReadTimestamp = false;
-    
-                        // OneOf field names bound to virtual getters and setters
-                        var $oneOfFields;
+                        ShortRepresentation.prototype.description = "";
     
                         /**
-                         * ReadOnly timestampBound.
-                         * @member {"strong"|"minReadTimestamp"|"maxStaleness"|"readTimestamp"|"exactStaleness"|undefined} timestampBound
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * ShortRepresentation subqueries.
+                         * @member {Object.<string,number>} subqueries
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @instance
                          */
-                        Object.defineProperty(ReadOnly.prototype, "timestampBound", {
-                            get: $util.oneOfGetter($oneOfFields = ["strong", "minReadTimestamp", "maxStaleness", "readTimestamp", "exactStaleness"]),
-                            set: $util.oneOfSetter($oneOfFields)
-                        });
+                        ShortRepresentation.prototype.subqueries = $util.emptyObject;
     
                         /**
-                         * Creates a new ReadOnly instance using the specified properties.
+                         * Creates a new ShortRepresentation instance using the specified properties.
                          * @function create
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
-                         * @param {google.spanner.v1.TransactionOptions.IReadOnly=} [properties] Properties to set
-                         * @returns {google.spanner.v1.TransactionOptions.ReadOnly} ReadOnly instance
+                         * @param {google.spanner.v1.PlanNode.IShortRepresentation=} [properties] Properties to set
+                         * @returns {google.spanner.v1.PlanNode.ShortRepresentation} ShortRepresentation instance
                          */
-                        ReadOnly.create = function create(properties) {
-                            return new ReadOnly(properties);
+                        ShortRepresentation.create = function create(properties) {
+                            return new ShortRepresentation(properties);
                         };
     
                         /**
-                         * Encodes the specified ReadOnly message. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadOnly.verify|verify} messages.
+                         * Encodes the specified ShortRepresentation message. Does not implicitly {@link google.spanner.v1.PlanNode.ShortRepresentation.verify|verify} messages.
                          * @function encode
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
-                         * @param {google.spanner.v1.TransactionOptions.IReadOnly} message ReadOnly message or plain object to encode
+                         * @param {google.spanner.v1.PlanNode.IShortRepresentation} message ShortRepresentation message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ReadOnly.encode = function encode(message, writer) {
+                        ShortRepresentation.encode = function encode(message, writer) {
                             if (!writer)
                                 writer = $Writer.create();
-                            if (message.strong != null && Object.hasOwnProperty.call(message, "strong"))
-                                writer.uint32(/* id 1, wireType 0 =*/8).bool(message.strong);
-                            if (message.minReadTimestamp != null && Object.hasOwnProperty.call(message, "minReadTimestamp"))
-                                $root.google.protobuf.Timestamp.encode(message.minReadTimestamp, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                            if (message.maxStaleness != null && Object.hasOwnProperty.call(message, "maxStaleness"))
-                                $root.google.protobuf.Duration.encode(message.maxStaleness, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
-                            if (message.readTimestamp != null && Object.hasOwnProperty.call(message, "readTimestamp"))
-                                $root.google.protobuf.Timestamp.encode(message.readTimestamp, writer.uint32(/* id 4, wireType 2 =*/34).fork()).ldelim();
-                            if (message.exactStaleness != null && Object.hasOwnProperty.call(message, "exactStaleness"))
-                                $root.google.protobuf.Duration.encode(message.exactStaleness, writer.uint32(/* id 5, wireType 2 =*/42).fork()).ldelim();
-                            if (message.returnReadTimestamp != null && Object.hasOwnProperty.call(message, "returnReadTimestamp"))
-                                writer.uint32(/* id 6, wireType 0 =*/48).bool(message.returnReadTimestamp);
+                            if (message.description != null && Object.hasOwnProperty.call(message, "description"))
+                                writer.uint32(/* id 1, wireType 2 =*/10).string(message.description);
+                            if (message.subqueries != null && Object.hasOwnProperty.call(message, "subqueries"))
+                                for (var keys = Object.keys(message.subqueries), i = 0; i < keys.length; ++i)
+                                    writer.uint32(/* id 2, wireType 2 =*/18).fork().uint32(/* id 1, wireType 2 =*/10).string(keys[i]).uint32(/* id 2, wireType 0 =*/16).int32(message.subqueries[keys[i]]).ldelim();
                             return writer;
                         };
     
                         /**
-                         * Encodes the specified ReadOnly message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionOptions.ReadOnly.verify|verify} messages.
+                         * Encodes the specified ShortRepresentation message, length delimited. Does not implicitly {@link google.spanner.v1.PlanNode.ShortRepresentation.verify|verify} messages.
                          * @function encodeDelimited
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
-                         * @param {google.spanner.v1.TransactionOptions.IReadOnly} message ReadOnly message or plain object to encode
+                         * @param {google.spanner.v1.PlanNode.IShortRepresentation} message ShortRepresentation message or plain object to encode
                          * @param {$protobuf.Writer} [writer] Writer to encode to
                          * @returns {$protobuf.Writer} Writer
                          */
-                        ReadOnly.encodeDelimited = function encodeDelimited(message, writer) {
+                        ShortRepresentation.encodeDelimited = function encodeDelimited(message, writer) {
                             return this.encode(message, writer).ldelim();
                         };
     
                         /**
-                         * Decodes a ReadOnly message from the specified reader or buffer.
+                         * Decodes a ShortRepresentation message from the specified reader or buffer.
                          * @function decode
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                          * @param {number} [length] Message length if known beforehand
-                         * @returns {google.spanner.v1.TransactionOptions.ReadOnly} ReadOnly
+                         * @returns {google.spanner.v1.PlanNode.ShortRepresentation} ShortRepresentation
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ReadOnly.decode = function decode(reader, length) {
+                        ShortRepresentation.decode = function decode(reader, length) {
                             if (!(reader instanceof $Reader))
                                 reader = $Reader.create(reader);
-                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionOptions.ReadOnly();
+                            var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.PlanNode.ShortRepresentation(), key, value;
                             while (reader.pos < end) {
                                 var tag = reader.uint32();
                                 switch (tag >>> 3) {
                                 case 1: {
-                                        message.strong = reader.bool();
+                                        message.description = reader.string();
                                         break;
                                     }
                                 case 2: {
-                                        message.minReadTimestamp = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 3: {
-                                        message.maxStaleness = $root.google.protobuf.Duration.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 4: {
-                                        message.readTimestamp = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 5: {
-                                        message.exactStaleness = $root.google.protobuf.Duration.decode(reader, reader.uint32());
-                                        break;
-                                    }
-                                case 6: {
-                                        message.returnReadTimestamp = reader.bool();
+                                        if (message.subqueries === $util.emptyObject)
+                                            message.subqueries = {};
+                                        var end2 = reader.uint32() + reader.pos;
+                                        key = "";
+                                        value = 0;
+                                        while (reader.pos < end2) {
+                                            var tag2 = reader.uint32();
+                                            switch (tag2 >>> 3) {
+                                            case 1:
+                                                key = reader.string();
+                                                break;
+                                            case 2:
+                                                value = reader.int32();
+                                                break;
+                                            default:
+                                                reader.skipType(tag2 & 7);
+                                                break;
+                                            }
+                                        }
+                                        message.subqueries[key] = value;
                                         break;
                                     }
                                 default:
@@ -84792,461 +86777,149 @@
                         };
     
                         /**
-                         * Decodes a ReadOnly message from the specified reader or buffer, length delimited.
+                         * Decodes a ShortRepresentation message from the specified reader or buffer, length delimited.
                          * @function decodeDelimited
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
                          * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                         * @returns {google.spanner.v1.TransactionOptions.ReadOnly} ReadOnly
+                         * @returns {google.spanner.v1.PlanNode.ShortRepresentation} ShortRepresentation
                          * @throws {Error} If the payload is not a reader or valid buffer
                          * @throws {$protobuf.util.ProtocolError} If required fields are missing
                          */
-                        ReadOnly.decodeDelimited = function decodeDelimited(reader) {
+                        ShortRepresentation.decodeDelimited = function decodeDelimited(reader) {
                             if (!(reader instanceof $Reader))
                                 reader = new $Reader(reader);
                             return this.decode(reader, reader.uint32());
                         };
     
                         /**
-                         * Verifies a ReadOnly message.
+                         * Verifies a ShortRepresentation message.
                          * @function verify
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
                          * @param {Object.<string,*>} message Plain object to verify
                          * @returns {string|null} `null` if valid, otherwise the reason why it is not
                          */
-                        ReadOnly.verify = function verify(message) {
+                        ShortRepresentation.verify = function verify(message) {
                             if (typeof message !== "object" || message === null)
                                 return "object expected";
-                            var properties = {};
-                            if (message.strong != null && message.hasOwnProperty("strong")) {
-                                properties.timestampBound = 1;
-                                if (typeof message.strong !== "boolean")
-                                    return "strong: boolean expected";
-                            }
-                            if (message.minReadTimestamp != null && message.hasOwnProperty("minReadTimestamp")) {
-                                if (properties.timestampBound === 1)
-                                    return "timestampBound: multiple values";
-                                properties.timestampBound = 1;
-                                {
-                                    var error = $root.google.protobuf.Timestamp.verify(message.minReadTimestamp);
-                                    if (error)
-                                        return "minReadTimestamp." + error;
-                                }
-                            }
-                            if (message.maxStaleness != null && message.hasOwnProperty("maxStaleness")) {
-                                if (properties.timestampBound === 1)
-                                    return "timestampBound: multiple values";
-                                properties.timestampBound = 1;
-                                {
-                                    var error = $root.google.protobuf.Duration.verify(message.maxStaleness);
-                                    if (error)
-                                        return "maxStaleness." + error;
-                                }
-                            }
-                            if (message.readTimestamp != null && message.hasOwnProperty("readTimestamp")) {
-                                if (properties.timestampBound === 1)
-                                    return "timestampBound: multiple values";
-                                properties.timestampBound = 1;
-                                {
-                                    var error = $root.google.protobuf.Timestamp.verify(message.readTimestamp);
-                                    if (error)
-                                        return "readTimestamp." + error;
-                                }
-                            }
-                            if (message.exactStaleness != null && message.hasOwnProperty("exactStaleness")) {
-                                if (properties.timestampBound === 1)
-                                    return "timestampBound: multiple values";
-                                properties.timestampBound = 1;
-                                {
-                                    var error = $root.google.protobuf.Duration.verify(message.exactStaleness);
-                                    if (error)
-                                        return "exactStaleness." + error;
-                                }
+                            if (message.description != null && message.hasOwnProperty("description"))
+                                if (!$util.isString(message.description))
+                                    return "description: string expected";
+                            if (message.subqueries != null && message.hasOwnProperty("subqueries")) {
+                                if (!$util.isObject(message.subqueries))
+                                    return "subqueries: object expected";
+                                var key = Object.keys(message.subqueries);
+                                for (var i = 0; i < key.length; ++i)
+                                    if (!$util.isInteger(message.subqueries[key[i]]))
+                                        return "subqueries: integer{k:string} expected";
                             }
-                            if (message.returnReadTimestamp != null && message.hasOwnProperty("returnReadTimestamp"))
-                                if (typeof message.returnReadTimestamp !== "boolean")
-                                    return "returnReadTimestamp: boolean expected";
                             return null;
                         };
     
                         /**
-                         * Creates a ReadOnly message from a plain object. Also converts values to their respective internal types.
+                         * Creates a ShortRepresentation message from a plain object. Also converts values to their respective internal types.
                          * @function fromObject
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
                          * @param {Object.<string,*>} object Plain object
-                         * @returns {google.spanner.v1.TransactionOptions.ReadOnly} ReadOnly
+                         * @returns {google.spanner.v1.PlanNode.ShortRepresentation} ShortRepresentation
                          */
-                        ReadOnly.fromObject = function fromObject(object) {
-                            if (object instanceof $root.google.spanner.v1.TransactionOptions.ReadOnly)
+                        ShortRepresentation.fromObject = function fromObject(object) {
+                            if (object instanceof $root.google.spanner.v1.PlanNode.ShortRepresentation)
                                 return object;
-                            var message = new $root.google.spanner.v1.TransactionOptions.ReadOnly();
-                            if (object.strong != null)
-                                message.strong = Boolean(object.strong);
-                            if (object.minReadTimestamp != null) {
-                                if (typeof object.minReadTimestamp !== "object")
-                                    throw TypeError(".google.spanner.v1.TransactionOptions.ReadOnly.minReadTimestamp: object expected");
-                                message.minReadTimestamp = $root.google.protobuf.Timestamp.fromObject(object.minReadTimestamp);
-                            }
-                            if (object.maxStaleness != null) {
-                                if (typeof object.maxStaleness !== "object")
-                                    throw TypeError(".google.spanner.v1.TransactionOptions.ReadOnly.maxStaleness: object expected");
-                                message.maxStaleness = $root.google.protobuf.Duration.fromObject(object.maxStaleness);
-                            }
-                            if (object.readTimestamp != null) {
-                                if (typeof object.readTimestamp !== "object")
-                                    throw TypeError(".google.spanner.v1.TransactionOptions.ReadOnly.readTimestamp: object expected");
-                                message.readTimestamp = $root.google.protobuf.Timestamp.fromObject(object.readTimestamp);
-                            }
-                            if (object.exactStaleness != null) {
-                                if (typeof object.exactStaleness !== "object")
-                                    throw TypeError(".google.spanner.v1.TransactionOptions.ReadOnly.exactStaleness: object expected");
-                                message.exactStaleness = $root.google.protobuf.Duration.fromObject(object.exactStaleness);
+                            var message = new $root.google.spanner.v1.PlanNode.ShortRepresentation();
+                            if (object.description != null)
+                                message.description = String(object.description);
+                            if (object.subqueries) {
+                                if (typeof object.subqueries !== "object")
+                                    throw TypeError(".google.spanner.v1.PlanNode.ShortRepresentation.subqueries: object expected");
+                                message.subqueries = {};
+                                for (var keys = Object.keys(object.subqueries), i = 0; i < keys.length; ++i)
+                                    message.subqueries[keys[i]] = object.subqueries[keys[i]] | 0;
                             }
-                            if (object.returnReadTimestamp != null)
-                                message.returnReadTimestamp = Boolean(object.returnReadTimestamp);
                             return message;
                         };
     
                         /**
-                         * Creates a plain object from a ReadOnly message. Also converts values to other types if specified.
+                         * Creates a plain object from a ShortRepresentation message. Also converts values to other types if specified.
                          * @function toObject
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
-                         * @param {google.spanner.v1.TransactionOptions.ReadOnly} message ReadOnly
+                         * @param {google.spanner.v1.PlanNode.ShortRepresentation} message ShortRepresentation
                          * @param {$protobuf.IConversionOptions} [options] Conversion options
                          * @returns {Object.<string,*>} Plain object
                          */
-                        ReadOnly.toObject = function toObject(message, options) {
+                        ShortRepresentation.toObject = function toObject(message, options) {
                             if (!options)
                                 options = {};
                             var object = {};
-                            if (options.defaults)
-                                object.returnReadTimestamp = false;
-                            if (message.strong != null && message.hasOwnProperty("strong")) {
-                                object.strong = message.strong;
-                                if (options.oneofs)
-                                    object.timestampBound = "strong";
-                            }
-                            if (message.minReadTimestamp != null && message.hasOwnProperty("minReadTimestamp")) {
-                                object.minReadTimestamp = $root.google.protobuf.Timestamp.toObject(message.minReadTimestamp, options);
-                                if (options.oneofs)
-                                    object.timestampBound = "minReadTimestamp";
-                            }
-                            if (message.maxStaleness != null && message.hasOwnProperty("maxStaleness")) {
-                                object.maxStaleness = $root.google.protobuf.Duration.toObject(message.maxStaleness, options);
-                                if (options.oneofs)
-                                    object.timestampBound = "maxStaleness";
-                            }
-                            if (message.readTimestamp != null && message.hasOwnProperty("readTimestamp")) {
-                                object.readTimestamp = $root.google.protobuf.Timestamp.toObject(message.readTimestamp, options);
-                                if (options.oneofs)
-                                    object.timestampBound = "readTimestamp";
-                            }
-                            if (message.exactStaleness != null && message.hasOwnProperty("exactStaleness")) {
-                                object.exactStaleness = $root.google.protobuf.Duration.toObject(message.exactStaleness, options);
-                                if (options.oneofs)
-                                    object.timestampBound = "exactStaleness";
+                            if (options.objects || options.defaults)
+                                object.subqueries = {};
+                            if (options.defaults)
+                                object.description = "";
+                            if (message.description != null && message.hasOwnProperty("description"))
+                                object.description = message.description;
+                            var keys2;
+                            if (message.subqueries && (keys2 = Object.keys(message.subqueries)).length) {
+                                object.subqueries = {};
+                                for (var j = 0; j < keys2.length; ++j)
+                                    object.subqueries[keys2[j]] = message.subqueries[keys2[j]];
                             }
-                            if (message.returnReadTimestamp != null && message.hasOwnProperty("returnReadTimestamp"))
-                                object.returnReadTimestamp = message.returnReadTimestamp;
                             return object;
                         };
     
                         /**
-                         * Converts this ReadOnly to JSON.
+                         * Converts this ShortRepresentation to JSON.
                          * @function toJSON
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @instance
                          * @returns {Object.<string,*>} JSON object
                          */
-                        ReadOnly.prototype.toJSON = function toJSON() {
+                        ShortRepresentation.prototype.toJSON = function toJSON() {
                             return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                         };
     
                         /**
-                         * Gets the default type url for ReadOnly
+                         * Gets the default type url for ShortRepresentation
                          * @function getTypeUrl
-                         * @memberof google.spanner.v1.TransactionOptions.ReadOnly
+                         * @memberof google.spanner.v1.PlanNode.ShortRepresentation
                          * @static
                          * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                          * @returns {string} The default type url
                          */
-                        ReadOnly.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                        ShortRepresentation.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                             if (typeUrlPrefix === undefined) {
                                 typeUrlPrefix = "type.googleapis.com";
                             }
-                            return typeUrlPrefix + "/google.spanner.v1.TransactionOptions.ReadOnly";
+                            return typeUrlPrefix + "/google.spanner.v1.PlanNode.ShortRepresentation";
                         };
     
-                        return ReadOnly;
+                        return ShortRepresentation;
                     })();
     
-                    return TransactionOptions;
-                })();
-    
-                v1.Transaction = (function() {
-    
-                    /**
-                     * Properties of a Transaction.
-                     * @memberof google.spanner.v1
-                     * @interface ITransaction
-                     * @property {Uint8Array|null} [id] Transaction id
-                     * @property {google.protobuf.ITimestamp|null} [readTimestamp] Transaction readTimestamp
-                     */
-    
-                    /**
-                     * Constructs a new Transaction.
-                     * @memberof google.spanner.v1
-                     * @classdesc Represents a Transaction.
-                     * @implements ITransaction
-                     * @constructor
-                     * @param {google.spanner.v1.ITransaction=} [properties] Properties to set
-                     */
-                    function Transaction(properties) {
-                        if (properties)
-                            for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
-                                if (properties[keys[i]] != null)
-                                    this[keys[i]] = properties[keys[i]];
-                    }
-    
-                    /**
-                     * Transaction id.
-                     * @member {Uint8Array} id
-                     * @memberof google.spanner.v1.Transaction
-                     * @instance
-                     */
-                    Transaction.prototype.id = $util.newBuffer([]);
-    
-                    /**
-                     * Transaction readTimestamp.
-                     * @member {google.protobuf.ITimestamp|null|undefined} readTimestamp
-                     * @memberof google.spanner.v1.Transaction
-                     * @instance
-                     */
-                    Transaction.prototype.readTimestamp = null;
-    
-                    /**
-                     * Creates a new Transaction instance using the specified properties.
-                     * @function create
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {google.spanner.v1.ITransaction=} [properties] Properties to set
-                     * @returns {google.spanner.v1.Transaction} Transaction instance
-                     */
-                    Transaction.create = function create(properties) {
-                        return new Transaction(properties);
-                    };
-    
-                    /**
-                     * Encodes the specified Transaction message. Does not implicitly {@link google.spanner.v1.Transaction.verify|verify} messages.
-                     * @function encode
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {google.spanner.v1.ITransaction} message Transaction message or plain object to encode
-                     * @param {$protobuf.Writer} [writer] Writer to encode to
-                     * @returns {$protobuf.Writer} Writer
-                     */
-                    Transaction.encode = function encode(message, writer) {
-                        if (!writer)
-                            writer = $Writer.create();
-                        if (message.id != null && Object.hasOwnProperty.call(message, "id"))
-                            writer.uint32(/* id 1, wireType 2 =*/10).bytes(message.id);
-                        if (message.readTimestamp != null && Object.hasOwnProperty.call(message, "readTimestamp"))
-                            $root.google.protobuf.Timestamp.encode(message.readTimestamp, writer.uint32(/* id 2, wireType 2 =*/18).fork()).ldelim();
-                        return writer;
-                    };
-    
-                    /**
-                     * Encodes the specified Transaction message, length delimited. Does not implicitly {@link google.spanner.v1.Transaction.verify|verify} messages.
-                     * @function encodeDelimited
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {google.spanner.v1.ITransaction} message Transaction message or plain object to encode
-                     * @param {$protobuf.Writer} [writer] Writer to encode to
-                     * @returns {$protobuf.Writer} Writer
-                     */
-                    Transaction.encodeDelimited = function encodeDelimited(message, writer) {
-                        return this.encode(message, writer).ldelim();
-                    };
-    
-                    /**
-                     * Decodes a Transaction message from the specified reader or buffer.
-                     * @function decode
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.Transaction} Transaction
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    Transaction.decode = function decode(reader, length) {
-                        if (!(reader instanceof $Reader))
-                            reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.Transaction();
-                        while (reader.pos < end) {
-                            var tag = reader.uint32();
-                            switch (tag >>> 3) {
-                            case 1: {
-                                    message.id = reader.bytes();
-                                    break;
-                                }
-                            case 2: {
-                                    message.readTimestamp = $root.google.protobuf.Timestamp.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            default:
-                                reader.skipType(tag & 7);
-                                break;
-                            }
-                        }
-                        return message;
-                    };
-    
-                    /**
-                     * Decodes a Transaction message from the specified reader or buffer, length delimited.
-                     * @function decodeDelimited
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.Transaction} Transaction
-                     * @throws {Error} If the payload is not a reader or valid buffer
-                     * @throws {$protobuf.util.ProtocolError} If required fields are missing
-                     */
-                    Transaction.decodeDelimited = function decodeDelimited(reader) {
-                        if (!(reader instanceof $Reader))
-                            reader = new $Reader(reader);
-                        return this.decode(reader, reader.uint32());
-                    };
-    
-                    /**
-                     * Verifies a Transaction message.
-                     * @function verify
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {Object.<string,*>} message Plain object to verify
-                     * @returns {string|null} `null` if valid, otherwise the reason why it is not
-                     */
-                    Transaction.verify = function verify(message) {
-                        if (typeof message !== "object" || message === null)
-                            return "object expected";
-                        if (message.id != null && message.hasOwnProperty("id"))
-                            if (!(message.id && typeof message.id.length === "number" || $util.isString(message.id)))
-                                return "id: buffer expected";
-                        if (message.readTimestamp != null && message.hasOwnProperty("readTimestamp")) {
-                            var error = $root.google.protobuf.Timestamp.verify(message.readTimestamp);
-                            if (error)
-                                return "readTimestamp." + error;
-                        }
-                        return null;
-                    };
-    
-                    /**
-                     * Creates a Transaction message from a plain object. Also converts values to their respective internal types.
-                     * @function fromObject
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.Transaction} Transaction
-                     */
-                    Transaction.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.Transaction)
-                            return object;
-                        var message = new $root.google.spanner.v1.Transaction();
-                        if (object.id != null)
-                            if (typeof object.id === "string")
-                                $util.base64.decode(object.id, message.id = $util.newBuffer($util.base64.length(object.id)), 0);
-                            else if (object.id.length >= 0)
-                                message.id = object.id;
-                        if (object.readTimestamp != null) {
-                            if (typeof object.readTimestamp !== "object")
-                                throw TypeError(".google.spanner.v1.Transaction.readTimestamp: object expected");
-                            message.readTimestamp = $root.google.protobuf.Timestamp.fromObject(object.readTimestamp);
-                        }
-                        return message;
-                    };
-    
-                    /**
-                     * Creates a plain object from a Transaction message. Also converts values to other types if specified.
-                     * @function toObject
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {google.spanner.v1.Transaction} message Transaction
-                     * @param {$protobuf.IConversionOptions} [options] Conversion options
-                     * @returns {Object.<string,*>} Plain object
-                     */
-                    Transaction.toObject = function toObject(message, options) {
-                        if (!options)
-                            options = {};
-                        var object = {};
-                        if (options.defaults) {
-                            if (options.bytes === String)
-                                object.id = "";
-                            else {
-                                object.id = [];
-                                if (options.bytes !== Array)
-                                    object.id = $util.newBuffer(object.id);
-                            }
-                            object.readTimestamp = null;
-                        }
-                        if (message.id != null && message.hasOwnProperty("id"))
-                            object.id = options.bytes === String ? $util.base64.encode(message.id, 0, message.id.length) : options.bytes === Array ? Array.prototype.slice.call(message.id) : message.id;
-                        if (message.readTimestamp != null && message.hasOwnProperty("readTimestamp"))
-                            object.readTimestamp = $root.google.protobuf.Timestamp.toObject(message.readTimestamp, options);
-                        return object;
-                    };
-    
-                    /**
-                     * Converts this Transaction to JSON.
-                     * @function toJSON
-                     * @memberof google.spanner.v1.Transaction
-                     * @instance
-                     * @returns {Object.<string,*>} JSON object
-                     */
-                    Transaction.prototype.toJSON = function toJSON() {
-                        return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
-                    };
-    
-                    /**
-                     * Gets the default type url for Transaction
-                     * @function getTypeUrl
-                     * @memberof google.spanner.v1.Transaction
-                     * @static
-                     * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
-                     * @returns {string} The default type url
-                     */
-                    Transaction.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
-                        if (typeUrlPrefix === undefined) {
-                            typeUrlPrefix = "type.googleapis.com";
-                        }
-                        return typeUrlPrefix + "/google.spanner.v1.Transaction";
-                    };
-    
-                    return Transaction;
+                    return PlanNode;
                 })();
     
-                v1.TransactionSelector = (function() {
+                v1.QueryPlan = (function() {
     
                     /**
-                     * Properties of a TransactionSelector.
+                     * Properties of a QueryPlan.
                      * @memberof google.spanner.v1
-                     * @interface ITransactionSelector
-                     * @property {google.spanner.v1.ITransactionOptions|null} [singleUse] TransactionSelector singleUse
-                     * @property {Uint8Array|null} [id] TransactionSelector id
-                     * @property {google.spanner.v1.ITransactionOptions|null} [begin] TransactionSelector begin
+                     * @interface IQueryPlan
+                     * @property {Array.<google.spanner.v1.IPlanNode>|null} [planNodes] QueryPlan planNodes
                      */
     
                     /**
-                     * Constructs a new TransactionSelector.
+                     * Constructs a new QueryPlan.
                      * @memberof google.spanner.v1
-                     * @classdesc Represents a TransactionSelector.
-                     * @implements ITransactionSelector
+                     * @classdesc Represents a QueryPlan.
+                     * @implements IQueryPlan
                      * @constructor
-                     * @param {google.spanner.v1.ITransactionSelector=} [properties] Properties to set
+                     * @param {google.spanner.v1.IQueryPlan=} [properties] Properties to set
                      */
-                    function TransactionSelector(properties) {
+                    function QueryPlan(properties) {
+                        this.planNodes = [];
                         if (properties)
                             for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                                 if (properties[keys[i]] != null)
@@ -85254,117 +86927,78 @@
                     }
     
                     /**
-                     * TransactionSelector singleUse.
-                     * @member {google.spanner.v1.ITransactionOptions|null|undefined} singleUse
-                     * @memberof google.spanner.v1.TransactionSelector
-                     * @instance
-                     */
-                    TransactionSelector.prototype.singleUse = null;
-    
-                    /**
-                     * TransactionSelector id.
-                     * @member {Uint8Array|null|undefined} id
-                     * @memberof google.spanner.v1.TransactionSelector
-                     * @instance
-                     */
-                    TransactionSelector.prototype.id = null;
-    
-                    /**
-                     * TransactionSelector begin.
-                     * @member {google.spanner.v1.ITransactionOptions|null|undefined} begin
-                     * @memberof google.spanner.v1.TransactionSelector
-                     * @instance
-                     */
-                    TransactionSelector.prototype.begin = null;
-    
-                    // OneOf field names bound to virtual getters and setters
-                    var $oneOfFields;
-    
-                    /**
-                     * TransactionSelector selector.
-                     * @member {"singleUse"|"id"|"begin"|undefined} selector
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * QueryPlan planNodes.
+                     * @member {Array.<google.spanner.v1.IPlanNode>} planNodes
+                     * @memberof google.spanner.v1.QueryPlan
                      * @instance
                      */
-                    Object.defineProperty(TransactionSelector.prototype, "selector", {
-                        get: $util.oneOfGetter($oneOfFields = ["singleUse", "id", "begin"]),
-                        set: $util.oneOfSetter($oneOfFields)
-                    });
+                    QueryPlan.prototype.planNodes = $util.emptyArray;
     
                     /**
-                     * Creates a new TransactionSelector instance using the specified properties.
+                     * Creates a new QueryPlan instance using the specified properties.
                      * @function create
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
-                     * @param {google.spanner.v1.ITransactionSelector=} [properties] Properties to set
-                     * @returns {google.spanner.v1.TransactionSelector} TransactionSelector instance
+                     * @param {google.spanner.v1.IQueryPlan=} [properties] Properties to set
+                     * @returns {google.spanner.v1.QueryPlan} QueryPlan instance
                      */
-                    TransactionSelector.create = function create(properties) {
-                        return new TransactionSelector(properties);
+                    QueryPlan.create = function create(properties) {
+                        return new QueryPlan(properties);
                     };
     
                     /**
-                     * Encodes the specified TransactionSelector message. Does not implicitly {@link google.spanner.v1.TransactionSelector.verify|verify} messages.
+                     * Encodes the specified QueryPlan message. Does not implicitly {@link google.spanner.v1.QueryPlan.verify|verify} messages.
                      * @function encode
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
-                     * @param {google.spanner.v1.ITransactionSelector} message TransactionSelector message or plain object to encode
+                     * @param {google.spanner.v1.IQueryPlan} message QueryPlan message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    TransactionSelector.encode = function encode(message, writer) {
+                    QueryPlan.encode = function encode(message, writer) {
                         if (!writer)
                             writer = $Writer.create();
-                        if (message.singleUse != null && Object.hasOwnProperty.call(message, "singleUse"))
-                            $root.google.spanner.v1.TransactionOptions.encode(message.singleUse, writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
-                        if (message.id != null && Object.hasOwnProperty.call(message, "id"))
-                            writer.uint32(/* id 2, wireType 2 =*/18).bytes(message.id);
-                        if (message.begin != null && Object.hasOwnProperty.call(message, "begin"))
-                            $root.google.spanner.v1.TransactionOptions.encode(message.begin, writer.uint32(/* id 3, wireType 2 =*/26).fork()).ldelim();
+                        if (message.planNodes != null && message.planNodes.length)
+                            for (var i = 0; i < message.planNodes.length; ++i)
+                                $root.google.spanner.v1.PlanNode.encode(message.planNodes[i], writer.uint32(/* id 1, wireType 2 =*/10).fork()).ldelim();
                         return writer;
                     };
     
                     /**
-                     * Encodes the specified TransactionSelector message, length delimited. Does not implicitly {@link google.spanner.v1.TransactionSelector.verify|verify} messages.
+                     * Encodes the specified QueryPlan message, length delimited. Does not implicitly {@link google.spanner.v1.QueryPlan.verify|verify} messages.
                      * @function encodeDelimited
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
-                     * @param {google.spanner.v1.ITransactionSelector} message TransactionSelector message or plain object to encode
+                     * @param {google.spanner.v1.IQueryPlan} message QueryPlan message or plain object to encode
                      * @param {$protobuf.Writer} [writer] Writer to encode to
                      * @returns {$protobuf.Writer} Writer
                      */
-                    TransactionSelector.encodeDelimited = function encodeDelimited(message, writer) {
+                    QueryPlan.encodeDelimited = function encodeDelimited(message, writer) {
                         return this.encode(message, writer).ldelim();
                     };
     
                     /**
-                     * Decodes a TransactionSelector message from the specified reader or buffer.
+                     * Decodes a QueryPlan message from the specified reader or buffer.
                      * @function decode
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
                      * @param {number} [length] Message length if known beforehand
-                     * @returns {google.spanner.v1.TransactionSelector} TransactionSelector
+                     * @returns {google.spanner.v1.QueryPlan} QueryPlan
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    TransactionSelector.decode = function decode(reader, length) {
+                    QueryPlan.decode = function decode(reader, length) {
                         if (!(reader instanceof $Reader))
                             reader = $Reader.create(reader);
-                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.TransactionSelector();
+                        var end = length === undefined ? reader.len : reader.pos + length, message = new $root.google.spanner.v1.QueryPlan();
                         while (reader.pos < end) {
                             var tag = reader.uint32();
                             switch (tag >>> 3) {
                             case 1: {
-                                    message.singleUse = $root.google.spanner.v1.TransactionOptions.decode(reader, reader.uint32());
-                                    break;
-                                }
-                            case 2: {
-                                    message.id = reader.bytes();
-                                    break;
-                                }
-                            case 3: {
-                                    message.begin = $root.google.spanner.v1.TransactionOptions.decode(reader, reader.uint32());
+                                    if (!(message.planNodes && message.planNodes.length))
+                                        message.planNodes = [];
+                                    message.planNodes.push($root.google.spanner.v1.PlanNode.decode(reader, reader.uint32()));
                                     break;
                                 }
                             default:
@@ -85376,149 +87010,119 @@
                     };
     
                     /**
-                     * Decodes a TransactionSelector message from the specified reader or buffer, length delimited.
+                     * Decodes a QueryPlan message from the specified reader or buffer, length delimited.
                      * @function decodeDelimited
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
                      * @param {$protobuf.Reader|Uint8Array} reader Reader or buffer to decode from
-                     * @returns {google.spanner.v1.TransactionSelector} TransactionSelector
+                     * @returns {google.spanner.v1.QueryPlan} QueryPlan
                      * @throws {Error} If the payload is not a reader or valid buffer
                      * @throws {$protobuf.util.ProtocolError} If required fields are missing
                      */
-                    TransactionSelector.decodeDelimited = function decodeDelimited(reader) {
+                    QueryPlan.decodeDelimited = function decodeDelimited(reader) {
                         if (!(reader instanceof $Reader))
                             reader = new $Reader(reader);
                         return this.decode(reader, reader.uint32());
                     };
     
                     /**
-                     * Verifies a TransactionSelector message.
+                     * Verifies a QueryPlan message.
                      * @function verify
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
                      * @param {Object.<string,*>} message Plain object to verify
                      * @returns {string|null} `null` if valid, otherwise the reason why it is not
                      */
-                    TransactionSelector.verify = function verify(message) {
+                    QueryPlan.verify = function verify(message) {
                         if (typeof message !== "object" || message === null)
                             return "object expected";
-                        var properties = {};
-                        if (message.singleUse != null && message.hasOwnProperty("singleUse")) {
-                            properties.selector = 1;
-                            {
-                                var error = $root.google.spanner.v1.TransactionOptions.verify(message.singleUse);
-                                if (error)
-                                    return "singleUse." + error;
-                            }
-                        }
-                        if (message.id != null && message.hasOwnProperty("id")) {
-                            if (properties.selector === 1)
-                                return "selector: multiple values";
-                            properties.selector = 1;
-                            if (!(message.id && typeof message.id.length === "number" || $util.isString(message.id)))
-                                return "id: buffer expected";
-                        }
-                        if (message.begin != null && message.hasOwnProperty("begin")) {
-                            if (properties.selector === 1)
-                                return "selector: multiple values";
-                            properties.selector = 1;
-                            {
-                                var error = $root.google.spanner.v1.TransactionOptions.verify(message.begin);
+                        if (message.planNodes != null && message.hasOwnProperty("planNodes")) {
+                            if (!Array.isArray(message.planNodes))
+                                return "planNodes: array expected";
+                            for (var i = 0; i < message.planNodes.length; ++i) {
+                                var error = $root.google.spanner.v1.PlanNode.verify(message.planNodes[i]);
                                 if (error)
-                                    return "begin." + error;
+                                    return "planNodes." + error;
                             }
                         }
                         return null;
                     };
     
                     /**
-                     * Creates a TransactionSelector message from a plain object. Also converts values to their respective internal types.
+                     * Creates a QueryPlan message from a plain object. Also converts values to their respective internal types.
                      * @function fromObject
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
                      * @param {Object.<string,*>} object Plain object
-                     * @returns {google.spanner.v1.TransactionSelector} TransactionSelector
+                     * @returns {google.spanner.v1.QueryPlan} QueryPlan
                      */
-                    TransactionSelector.fromObject = function fromObject(object) {
-                        if (object instanceof $root.google.spanner.v1.TransactionSelector)
+                    QueryPlan.fromObject = function fromObject(object) {
+                        if (object instanceof $root.google.spanner.v1.QueryPlan)
                             return object;
-                        var message = new $root.google.spanner.v1.TransactionSelector();
-                        if (object.singleUse != null) {
-                            if (typeof object.singleUse !== "object")
-                                throw TypeError(".google.spanner.v1.TransactionSelector.singleUse: object expected");
-                            message.singleUse = $root.google.spanner.v1.TransactionOptions.fromObject(object.singleUse);
-                        }
-                        if (object.id != null)
-                            if (typeof object.id === "string")
-                                $util.base64.decode(object.id, message.id = $util.newBuffer($util.base64.length(object.id)), 0);
-                            else if (object.id.length >= 0)
-                                message.id = object.id;
-                        if (object.begin != null) {
-                            if (typeof object.begin !== "object")
-                                throw TypeError(".google.spanner.v1.TransactionSelector.begin: object expected");
-                            message.begin = $root.google.spanner.v1.TransactionOptions.fromObject(object.begin);
+                        var message = new $root.google.spanner.v1.QueryPlan();
+                        if (object.planNodes) {
+                            if (!Array.isArray(object.planNodes))
+                                throw TypeError(".google.spanner.v1.QueryPlan.planNodes: array expected");
+                            message.planNodes = [];
+                            for (var i = 0; i < object.planNodes.length; ++i) {
+                                if (typeof object.planNodes[i] !== "object")
+                                    throw TypeError(".google.spanner.v1.QueryPlan.planNodes: object expected");
+                                message.planNodes[i] = $root.google.spanner.v1.PlanNode.fromObject(object.planNodes[i]);
+                            }
                         }
                         return message;
                     };
     
                     /**
-                     * Creates a plain object from a TransactionSelector message. Also converts values to other types if specified.
+                     * Creates a plain object from a QueryPlan message. Also converts values to other types if specified.
                      * @function toObject
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
-                     * @param {google.spanner.v1.TransactionSelector} message TransactionSelector
+                     * @param {google.spanner.v1.QueryPlan} message QueryPlan
                      * @param {$protobuf.IConversionOptions} [options] Conversion options
                      * @returns {Object.<string,*>} Plain object
                      */
-                    TransactionSelector.toObject = function toObject(message, options) {
+                    QueryPlan.toObject = function toObject(message, options) {
                         if (!options)
                             options = {};
                         var object = {};
-                        if (message.singleUse != null && message.hasOwnProperty("singleUse")) {
-                            object.singleUse = $root.google.spanner.v1.TransactionOptions.toObject(message.singleUse, options);
-                            if (options.oneofs)
-                                object.selector = "singleUse";
-                        }
-                        if (message.id != null && message.hasOwnProperty("id")) {
-                            object.id = options.bytes === String ? $util.base64.encode(message.id, 0, message.id.length) : options.bytes === Array ? Array.prototype.slice.call(message.id) : message.id;
-                            if (options.oneofs)
-                                object.selector = "id";
-                        }
-                        if (message.begin != null && message.hasOwnProperty("begin")) {
-                            object.begin = $root.google.spanner.v1.TransactionOptions.toObject(message.begin, options);
-                            if (options.oneofs)
-                                object.selector = "begin";
+                        if (options.arrays || options.defaults)
+                            object.planNodes = [];
+                        if (message.planNodes && message.planNodes.length) {
+                            object.planNodes = [];
+                            for (var j = 0; j < message.planNodes.length; ++j)
+                                object.planNodes[j] = $root.google.spanner.v1.PlanNode.toObject(message.planNodes[j], options);
                         }
                         return object;
                     };
     
                     /**
-                     * Converts this TransactionSelector to JSON.
+                     * Converts this QueryPlan to JSON.
                      * @function toJSON
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @instance
                      * @returns {Object.<string,*>} JSON object
                      */
-                    TransactionSelector.prototype.toJSON = function toJSON() {
+                    QueryPlan.prototype.toJSON = function toJSON() {
                         return this.constructor.toObject(this, $protobuf.util.toJSONOptions);
                     };
     
                     /**
-                     * Gets the default type url for TransactionSelector
+                     * Gets the default type url for QueryPlan
                      * @function getTypeUrl
-                     * @memberof google.spanner.v1.TransactionSelector
+                     * @memberof google.spanner.v1.QueryPlan
                      * @static
                      * @param {string} [typeUrlPrefix] your custom typeUrlPrefix(default "type.googleapis.com")
                      * @returns {string} The default type url
                      */
-                    TransactionSelector.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
+                    QueryPlan.getTypeUrl = function getTypeUrl(typeUrlPrefix) {
                         if (typeUrlPrefix === undefined) {
                             typeUrlPrefix = "type.googleapis.com";
                         }
-                        return typeUrlPrefix + "/google.spanner.v1.TransactionSelector";
+                        return typeUrlPrefix + "/google.spanner.v1.QueryPlan";
                     };
     
-                    return TransactionSelector;
+                    return QueryPlan;
                 })();
     
                 v1.Type = (function() {
@@ -85731,6 +87335,7 @@
                             case 11:
                             case 13:
                             case 14:
+                            case 16:
                                 break;
                             }
                         if (message.arrayElementType != null && message.hasOwnProperty("arrayElementType")) {
@@ -85838,6 +87443,10 @@
                         case 14:
                             message.code = 14;
                             break;
+                        case "INTERVAL":
+                        case 16:
+                            message.code = 16;
+                            break;
                         }
                         if (object.arrayElementType != null) {
                             if (typeof object.arrayElementType !== "object")
@@ -86415,6 +88024,7 @@
                  * @property {number} JSON=11 JSON value
                  * @property {number} PROTO=13 PROTO value
                  * @property {number} ENUM=14 ENUM value
+                 * @property {number} INTERVAL=16 INTERVAL value
                  */
                 v1.TypeCode = (function() {
                     var valuesById = {}, values = Object.create(valuesById);
@@ -86433,6 +88043,7 @@
                     values[valuesById[11] = "JSON"] = 11;
                     values[valuesById[13] = "PROTO"] = 13;
                     values[valuesById[14] = "ENUM"] = 14;
+                    values[valuesById[16] = "INTERVAL"] = 16;
                     return values;
                 })();
     
diff --git a/protos/protos.json b/protos/protos.json
index 68b8708a8..4920ef456 100644
--- a/protos/protos.json
+++ b/protos/protos.json
@@ -3619,6 +3619,17 @@
                             "FULFILLMENT_PERIOD_EXTENDED": 2
                           }
                         },
+                        "ReplicaSelection": {
+                          "fields": {
+                            "location": {
+                              "type": "string",
+                              "id": 1,
+                              "options": {
+                                "(google.api.field_behavior)": "REQUIRED"
+                              }
+                            }
+                          }
+                        },
                         "InstanceAdmin": {
                           "options": {
                             "(google.api.default_host)": "spanner.googleapis.com",
@@ -4190,6 +4201,33 @@
                             }
                           }
                         },
+                        "ReplicaComputeCapacity": {
+                          "oneofs": {
+                            "computeCapacity": {
+                              "oneof": [
+                                "nodeCount",
+                                "processingUnits"
+                              ]
+                            }
+                          },
+                          "fields": {
+                            "replicaSelection": {
+                              "type": "ReplicaSelection",
+                              "id": 1,
+                              "options": {
+                                "(google.api.field_behavior)": "REQUIRED"
+                              }
+                            },
+                            "nodeCount": {
+                              "type": "int32",
+                              "id": 2
+                            },
+                            "processingUnits": {
+                              "type": "int32",
+                              "id": 3
+                            }
+                          }
+                        },
                         "AutoscalingConfig": {
                           "fields": {
                             "autoscalingLimits": {
@@ -4205,6 +4243,14 @@
                               "options": {
                                 "(google.api.field_behavior)": "REQUIRED"
                               }
+                            },
+                            "asymmetricAutoscalingOptions": {
+                              "rule": "repeated",
+                              "type": "AsymmetricAutoscalingOption",
+                              "id": 3,
+                              "options": {
+                                "(google.api.field_behavior)": "OPTIONAL"
+                              }
                             }
                           },
                           "nested": {
@@ -4259,6 +4305,44 @@
                                   }
                                 }
                               }
+                            },
+                            "AsymmetricAutoscalingOption": {
+                              "fields": {
+                                "replicaSelection": {
+                                  "type": "ReplicaSelection",
+                                  "id": 1,
+                                  "options": {
+                                    "(google.api.field_behavior)": "REQUIRED"
+                                  }
+                                },
+                                "overrides": {
+                                  "type": "AutoscalingConfigOverrides",
+                                  "id": 2,
+                                  "options": {
+                                    "(google.api.field_behavior)": "OPTIONAL"
+                                  }
+                                }
+                              },
+                              "nested": {
+                                "AutoscalingConfigOverrides": {
+                                  "fields": {
+                                    "autoscalingLimits": {
+                                      "type": "AutoscalingLimits",
+                                      "id": 1,
+                                      "options": {
+                                        "(google.api.field_behavior)": "OPTIONAL"
+                                      }
+                                    },
+                                    "autoscalingTargetHighPriorityCpuUtilizationPercent": {
+                                      "type": "int32",
+                                      "id": 2,
+                                      "options": {
+                                        "(google.api.field_behavior)": "OPTIONAL"
+                                      }
+                                    }
+                                  }
+                                }
+                              }
                             }
                           }
                         },
@@ -4298,6 +4382,14 @@
                               "type": "int32",
                               "id": 9
                             },
+                            "replicaComputeCapacity": {
+                              "rule": "repeated",
+                              "type": "ReplicaComputeCapacity",
+                              "id": 19,
+                              "options": {
+                                "(google.api.field_behavior)": "OUTPUT_ONLY"
+                              }
+                            },
                             "autoscalingConfig": {
                               "type": "AutoscalingConfig",
                               "id": 17,
@@ -4342,6 +4434,13 @@
                               "options": {
                                 "(google.api.field_behavior)": "OPTIONAL"
                               }
+                            },
+                            "defaultBackupScheduleType": {
+                              "type": "DefaultBackupScheduleType",
+                              "id": 23,
+                              "options": {
+                                "(google.api.field_behavior)": "OPTIONAL"
+                              }
                             }
                           },
                           "nested": {
@@ -4359,6 +4458,13 @@
                                 "ENTERPRISE": 2,
                                 "ENTERPRISE_PLUS": 3
                               }
+                            },
+                            "DefaultBackupScheduleType": {
+                              "values": {
+                                "DEFAULT_BACKUP_SCHEDULE_TYPE_UNSPECIFIED": 0,
+                                "NONE": 1,
+                                "AUTOMATIC": 2
+                              }
                             }
                           }
                         },
@@ -7966,7 +8072,9 @@
                       "values": {
                         "NORMAL": 0,
                         "PLAN": 1,
-                        "PROFILE": 2
+                        "PROFILE": 2,
+                        "WITH_STATS": 3,
+                        "WITH_PLAN_AND_STATS": 4
                       }
                     },
                     "QueryOptions": {
@@ -8053,6 +8161,13 @@
                     "status": {
                       "type": "google.rpc.Status",
                       "id": 2
+                    },
+                    "precommitToken": {
+                      "type": "MultiplexedSessionPrecommitToken",
+                      "id": 3,
+                      "options": {
+                        "(google.api.field_behavior)": "OPTIONAL"
+                      }
                     }
                   }
                 },
@@ -8284,6 +8399,13 @@
                     "requestOptions": {
                       "type": "RequestOptions",
                       "id": 3
+                    },
+                    "mutationKey": {
+                      "type": "Mutation",
+                      "id": 4,
+                      "options": {
+                        "(google.api.field_behavior)": "OPTIONAL"
+                      }
                     }
                   }
                 },
@@ -8332,6 +8454,13 @@
                     "requestOptions": {
                       "type": "RequestOptions",
                       "id": 6
+                    },
+                    "precommitToken": {
+                      "type": "MultiplexedSessionPrecommitToken",
+                      "id": 9,
+                      "options": {
+                        "(google.api.field_behavior)": "OPTIONAL"
+                      }
                     }
                   }
                 },
@@ -8417,6 +8546,13 @@
                   }
                 },
                 "CommitResponse": {
+                  "oneofs": {
+                    "MultiplexedSessionRetry": {
+                      "oneof": [
+                        "precommitToken"
+                      ]
+                    }
+                  },
                   "fields": {
                     "commitTimestamp": {
                       "type": "google.protobuf.Timestamp",
@@ -8425,6 +8561,10 @@
                     "commitStats": {
                       "type": "CommitStats",
                       "id": 2
+                    },
+                    "precommitToken": {
+                      "type": "MultiplexedSessionPrecommitToken",
+                      "id": 4
                     }
                   },
                   "nested": {
@@ -8438,6 +8578,156 @@
                     }
                   }
                 },
+                "TransactionOptions": {
+                  "oneofs": {
+                    "mode": {
+                      "oneof": [
+                        "readWrite",
+                        "partitionedDml",
+                        "readOnly"
+                      ]
+                    }
+                  },
+                  "fields": {
+                    "readWrite": {
+                      "type": "ReadWrite",
+                      "id": 1
+                    },
+                    "partitionedDml": {
+                      "type": "PartitionedDml",
+                      "id": 3
+                    },
+                    "readOnly": {
+                      "type": "ReadOnly",
+                      "id": 2
+                    },
+                    "excludeTxnFromChangeStreams": {
+                      "type": "bool",
+                      "id": 5
+                    }
+                  },
+                  "nested": {
+                    "ReadWrite": {
+                      "fields": {
+                        "readLockMode": {
+                          "type": "ReadLockMode",
+                          "id": 1
+                        },
+                        "multiplexedSessionPreviousTransactionId": {
+                          "type": "bytes",
+                          "id": 2,
+                          "options": {
+                            "(google.api.field_behavior)": "OPTIONAL"
+                          }
+                        }
+                      },
+                      "nested": {
+                        "ReadLockMode": {
+                          "values": {
+                            "READ_LOCK_MODE_UNSPECIFIED": 0,
+                            "PESSIMISTIC": 1,
+                            "OPTIMISTIC": 2
+                          }
+                        }
+                      }
+                    },
+                    "PartitionedDml": {
+                      "fields": {}
+                    },
+                    "ReadOnly": {
+                      "oneofs": {
+                        "timestampBound": {
+                          "oneof": [
+                            "strong",
+                            "minReadTimestamp",
+                            "maxStaleness",
+                            "readTimestamp",
+                            "exactStaleness"
+                          ]
+                        }
+                      },
+                      "fields": {
+                        "strong": {
+                          "type": "bool",
+                          "id": 1
+                        },
+                        "minReadTimestamp": {
+                          "type": "google.protobuf.Timestamp",
+                          "id": 2
+                        },
+                        "maxStaleness": {
+                          "type": "google.protobuf.Duration",
+                          "id": 3
+                        },
+                        "readTimestamp": {
+                          "type": "google.protobuf.Timestamp",
+                          "id": 4
+                        },
+                        "exactStaleness": {
+                          "type": "google.protobuf.Duration",
+                          "id": 5
+                        },
+                        "returnReadTimestamp": {
+                          "type": "bool",
+                          "id": 6
+                        }
+                      }
+                    }
+                  }
+                },
+                "Transaction": {
+                  "fields": {
+                    "id": {
+                      "type": "bytes",
+                      "id": 1
+                    },
+                    "readTimestamp": {
+                      "type": "google.protobuf.Timestamp",
+                      "id": 2
+                    },
+                    "precommitToken": {
+                      "type": "MultiplexedSessionPrecommitToken",
+                      "id": 3
+                    }
+                  }
+                },
+                "TransactionSelector": {
+                  "oneofs": {
+                    "selector": {
+                      "oneof": [
+                        "singleUse",
+                        "id",
+                        "begin"
+                      ]
+                    }
+                  },
+                  "fields": {
+                    "singleUse": {
+                      "type": "TransactionOptions",
+                      "id": 1
+                    },
+                    "id": {
+                      "type": "bytes",
+                      "id": 2
+                    },
+                    "begin": {
+                      "type": "TransactionOptions",
+                      "id": 3
+                    }
+                  }
+                },
+                "MultiplexedSessionPrecommitToken": {
+                  "fields": {
+                    "precommitToken": {
+                      "type": "bytes",
+                      "id": 1
+                    },
+                    "seqNum": {
+                      "type": "int32",
+                      "id": 2
+                    }
+                  }
+                },
                 "KeyRange": {
                   "oneofs": {
                     "startKeyType": {
@@ -8580,6 +8870,13 @@
                     "stats": {
                       "type": "ResultSetStats",
                       "id": 3
+                    },
+                    "precommitToken": {
+                      "type": "MultiplexedSessionPrecommitToken",
+                      "id": 5,
+                      "options": {
+                        "(google.api.field_behavior)": "OPTIONAL"
+                      }
                     }
                   }
                 },
@@ -8605,6 +8902,13 @@
                     "stats": {
                       "type": "ResultSetStats",
                       "id": 5
+                    },
+                    "precommitToken": {
+                      "type": "MultiplexedSessionPrecommitToken",
+                      "id": 8,
+                      "options": {
+                        "(google.api.field_behavior)": "OPTIONAL"
+                      }
                     }
                   }
                 },
@@ -8732,133 +9036,6 @@
                     }
                   }
                 },
-                "TransactionOptions": {
-                  "oneofs": {
-                    "mode": {
-                      "oneof": [
-                        "readWrite",
-                        "partitionedDml",
-                        "readOnly"
-                      ]
-                    }
-                  },
-                  "fields": {
-                    "readWrite": {
-                      "type": "ReadWrite",
-                      "id": 1
-                    },
-                    "partitionedDml": {
-                      "type": "PartitionedDml",
-                      "id": 3
-                    },
-                    "readOnly": {
-                      "type": "ReadOnly",
-                      "id": 2
-                    },
-                    "excludeTxnFromChangeStreams": {
-                      "type": "bool",
-                      "id": 5
-                    }
-                  },
-                  "nested": {
-                    "ReadWrite": {
-                      "fields": {
-                        "readLockMode": {
-                          "type": "ReadLockMode",
-                          "id": 1
-                        }
-                      },
-                      "nested": {
-                        "ReadLockMode": {
-                          "values": {
-                            "READ_LOCK_MODE_UNSPECIFIED": 0,
-                            "PESSIMISTIC": 1,
-                            "OPTIMISTIC": 2
-                          }
-                        }
-                      }
-                    },
-                    "PartitionedDml": {
-                      "fields": {}
-                    },
-                    "ReadOnly": {
-                      "oneofs": {
-                        "timestampBound": {
-                          "oneof": [
-                            "strong",
-                            "minReadTimestamp",
-                            "maxStaleness",
-                            "readTimestamp",
-                            "exactStaleness"
-                          ]
-                        }
-                      },
-                      "fields": {
-                        "strong": {
-                          "type": "bool",
-                          "id": 1
-                        },
-                        "minReadTimestamp": {
-                          "type": "google.protobuf.Timestamp",
-                          "id": 2
-                        },
-                        "maxStaleness": {
-                          "type": "google.protobuf.Duration",
-                          "id": 3
-                        },
-                        "readTimestamp": {
-                          "type": "google.protobuf.Timestamp",
-                          "id": 4
-                        },
-                        "exactStaleness": {
-                          "type": "google.protobuf.Duration",
-                          "id": 5
-                        },
-                        "returnReadTimestamp": {
-                          "type": "bool",
-                          "id": 6
-                        }
-                      }
-                    }
-                  }
-                },
-                "Transaction": {
-                  "fields": {
-                    "id": {
-                      "type": "bytes",
-                      "id": 1
-                    },
-                    "readTimestamp": {
-                      "type": "google.protobuf.Timestamp",
-                      "id": 2
-                    }
-                  }
-                },
-                "TransactionSelector": {
-                  "oneofs": {
-                    "selector": {
-                      "oneof": [
-                        "singleUse",
-                        "id",
-                        "begin"
-                      ]
-                    }
-                  },
-                  "fields": {
-                    "singleUse": {
-                      "type": "TransactionOptions",
-                      "id": 1
-                    },
-                    "id": {
-                      "type": "bytes",
-                      "id": 2
-                    },
-                    "begin": {
-                      "type": "TransactionOptions",
-                      "id": 3
-                    }
-                  }
-                },
                 "Type": {
                   "fields": {
                     "code": {
@@ -8925,7 +9102,8 @@
                     "NUMERIC": 10,
                     "JSON": 11,
                     "PROTO": 13,
-                    "ENUM": 14
+                    "ENUM": 14,
+                    "INTERVAL": 16
                   }
                 },
                 "TypeAnnotationCode": {
diff --git a/src/v1/spanner_client.ts b/src/v1/spanner_client.ts
index 88ccdd254..c774dd59c 100644
--- a/src/v1/spanner_client.ts
+++ b/src/v1/spanner_client.ts
@@ -1264,6 +1264,13 @@ export class SpannerClient {
    *   request_options struct will not do anything. To set the priority for a
    *   transaction, set it on the reads and writes that are part of this
    *   transaction instead.
+   * @param {google.spanner.v1.Mutation} [request.mutationKey]
+   *   Optional. Required for read-write transactions on a multiplexed session
+   *   that commit mutations but do not perform any reads or queries. Clients
+   *   should randomly select one of the mutations from the mutation set and send
+   *   it as a part of this request.
+   *   This feature is not yet supported and will result in an UNIMPLEMENTED
+   *   error.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Promise} - The promise which resolves to an array.
@@ -1385,6 +1392,13 @@ export class SpannerClient {
    *   and 500 ms.
    * @param {google.spanner.v1.RequestOptions} request.requestOptions
    *   Common options for this request.
+   * @param {google.spanner.v1.MultiplexedSessionPrecommitToken} [request.precommitToken]
+   *   Optional. If the read-write transaction was executed on a multiplexed
+   *   session, the precommit token with the highest sequence number received in
+   *   this transaction attempt, should be included here. Failing to do so will
+   *   result in a FailedPrecondition error.
+   *   This feature is not yet supported and will result in an UNIMPLEMENTED
+   *   error.
    * @param {object} [options]
    *   Call options. See {@link https://googleapis.dev/nodejs/google-gax/latest/interfaces/CallOptions.html|CallOptions} for more details.
    * @returns {Promise} - The promise which resolves to an array.
diff --git a/test/spanner.ts b/test/spanner.ts
index 0212f6b92..dcc8a3300 100644
--- a/test/spanner.ts
+++ b/test/spanner.ts
@@ -3433,9 +3433,6 @@ describe('Spanner with mock server', () => {
       }) as v1.CommitRequest;
       assert.ok(commitRequest, 'Commit was called');
       assert.strictEqual(commitRequest.mutations.length, 2);
-      assert.deepStrictEqual(commitRequest.singleUseTransaction?.readWrite, {
-        readLockMode: 'READ_LOCK_MODE_UNSPECIFIED',
-      });
     });
 
     it('should apply blind writes only once with excludeTxnFromChangeStreams option', async () => {