The tidb_redact_log cannot be applied to the explain.

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

create table t(a int primary key);
set session tidb_redact_log=MARKER;
explain select * from t where a = 1;

2. What did you expect to see? (Required)

+---------------------+-----------+-----------+---------------+--------------------------------+
| id                  | estRows   | task      | access object | operator info                  |
+---------------------+-----------+-----------+---------------+--------------------------------+
| TableReader_7       | 174.87    | root      | partition:p1  | data:Selection_6               |
| └─Selection_6       | 174.87    | cop[tikv] |               | eq(test.t.a, <1>)                |
|   └─TableFullScan_5 | 174868.00 | cop[tikv] | table:t       | keep order:false, stats:pseudo |
+---------------------+-----------+-----------+---------------+--------------------------------+

3. What did you see instead (Required)

+---------------------+-----------+-----------+---------------+--------------------------------+
| id                  | estRows   | task      | access object | operator info                  |
+---------------------+-----------+-----------+---------------+--------------------------------+
| TableReader_7       | 174.87    | root      | partition:p1  | data:Selection_6               |
| └─Selection_6       | 174.87    | cop[tikv] |               | eq(test.t.a, 1)                |
|   └─TableFullScan_5 | 174868.00 | cop[tikv] | table:t       | keep order:false, stats:pseudo |
+---------------------+-----------+-----------+---------------+--------------------------------+

4. What is your TiDB version? (Required)