session: refine error message desensitization (#19409)

[ti-srebot]

cherry-pick #19409 to release-4.0

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Signed-off-by: crazycs520 crazycs520@gmail.com

What problem does this PR solve?

Close #18566 (comment)

• Make Duplicate entry error message desensitization.

Below is the test SQL:

create table t (id int auto_increment, b int,  unique index (id));
insert into t values  (1,1),(1,1);
begin;
insert into t values  (1,1);
insert into t values  (1,1);

• change variable name from tidb_log_desensitization to tidb_redact_log .

related log:

[2020/08/24 20:26:01.567 +08:00] [WARN] [session.go:476] ["can not retry txn"] [conn=1] [label=general] [error="[kv:1062]Duplicate entry '?' for key '?'"] [IsBatchInsert=false] [IsPessimistic=false] [InRestrictedSQL=false] [tidb_retry_limit=10] [tidb_disable_txn_auto_retry=true]
[2020/08/24 20:26:01.567 +08:00] [WARN] [session.go:492] ["commit failed"] [conn=1] ["finished txn"="Txn{state=invalid}"] [error="[kv:1062]Duplicate entry '?' for key '?'"]
[2020/08/24 20:26:01.567 +08:00] [ERROR] [conn.go:744] ["command dispatched failed"] [conn=1] [connInfo="id:1, addr:127.0.0.1:60651 status:10, collation:utf8_general_ci, user:root"] [command=Query] [status="inTxn:0, autocommit:1"] [sql="insert into t values ( ... )"] [txn_mode=OPTIMISTIC] [err="[kv:1062]Duplicate entry '?' for key '?'"]
[2020/08/24 20:26:01.567 +08:00] [INFO] [2pc.go:717] ["2PC clean up done"] [conn=1] [txnStartTS=418977405093019648]
[2020/08/24 20:26:01.663 +08:00] [ERROR] [conn.go:744] ["command dispatched failed"] [conn=1] [connInfo="id:1, addr:127.0.0.1:60651 status:11, collation:utf8_general_ci, user:root"] [command=Query] [status="inTxn:1, autocommit:1"] [sql="insert into t values ( ... )"] [txn_mode=OPTIMISTIC] [err="[kv:1062]Duplicate entry '?' for key '?'"]

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• Need to cherry-pick to the release branch

Check List

Tests

• Manual test (add detailed scripts or steps below)

Side effects

• Performance regression
  • Consumes more CPU
  • Consumes more MEM
• • Breaking backward compatibility: change variable name from tidb_log_desensitization to tidb_redact_log .

Release note

• Refine error message desensitization.

[ti-srebot]

/run-all-tests

[SunRunAway]

@crazycs520 Please resolve the conflicts

[jackysp]

LGTM

[SunRunAway]

LGTM

[SunRunAway]

/merge

[ti-srebot]

/run-all-tests

[ti-srebot]

/run-all-tests