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QueryWithJsonParameterSample.java
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QueryWithJsonParameterSample.java
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/*
* Copyright 2021 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.spanner;
// [START spanner_query_with_json_parameter]
import com.google.cloud.spanner.DatabaseClient;
import com.google.cloud.spanner.DatabaseId;
import com.google.cloud.spanner.ResultSet;
import com.google.cloud.spanner.Spanner;
import com.google.cloud.spanner.SpannerOptions;
import com.google.cloud.spanner.Statement;
import com.google.cloud.spanner.Value;
class QueryWithJsonParameterSample {
static void queryWithJsonParameter() {
// TODO(developer): Replace these variables before running the sample.
String projectId = "my-project";
String instanceId = "my-instance";
String databaseId = "my-database";
try (Spanner spanner =
SpannerOptions.newBuilder().setProjectId(projectId).build().getService()) {
DatabaseClient client =
spanner.getDatabaseClient(DatabaseId.of(projectId, instanceId, databaseId));
queryWithJsonParameter(client);
}
}
static void queryWithJsonParameter(DatabaseClient client) {
String exampleJson = "{\"rating\": 9}";
Statement statement =
Statement.newBuilder(
"SELECT VenueId, VenueDetails\n"
+ "FROM Venues\n"
+ "WHERE JSON_VALUE(VenueDetails, '$.rating') = "
+ "JSON_VALUE(@details, '$.rating')")
.bind("details")
.to(Value.json(exampleJson))
.build();
try (ResultSet resultSet = client.singleUse().executeQuery(statement)) {
while (resultSet.next()) {
System.out.printf(
"VenueId: %s, VenueDetails: %s%n",
resultSet.getLong("VenueId"), resultSet.getJson("VenueDetails"));
}
}
}
}
// [END spanner_query_with_json_parameter]