TiDB 5.3.4 Release Notes

Release date: November 24, 2022

TiDB version: 5.3.4

Improvements

• TiKV

  • Reload TLS certificate automatically for each update to improve availability #12546

Bug fixes

• TiDB

  • Fix the issue that the Region cache is not cleaned up in time when the Region is merged #37141
  • Fix the issue that TiDB writes wrong data due to the wrong encoding of the ENUM or SET column #32302
  • Fix the issue that database-level privileges are incorrectly cleaned up #38363
  • Fix the issue that the grantor field is missing in the mysql.tables_priv table #38293
  • Fix the issue that KILL TIDB cannot take effect immediately on idle connections #24031
  • Fix the issue that the return type of date_add and date_sub is different between TiDB and MySQL #36394, #27573
  • Fix the incorrect INSERT_METHOD value when Parser restores table options #38368
  • Fix the issue that authentication fails when a MySQL client of v5.1 or earlier connects to the TiDB server #29725
  • Fix wrong results of GREATEST and LEAST when passing in unsigned BIGINT arguments #30101
  • Fix the issue that the result of concat(ifnull(time(3)) in TiDB is different from that in MySQL #29498
  • Fix the issue that the avg() function returns ERROR 1105 (HY000): other error for mpp stream: Could not convert to the target type - -value is out of range. when queried from TiFlash #29952
  • Fix the issue that ERROR 1105 (HY000): close of nil channel is returned when using HashJoinExec #30289
  • Fix the issue that TiKV and TiFlash return different results when querying logical operations #37258
  • Fix the issue that the EXPLAIN ANALYZE statement with DML executors might return result before the transaction commit finishes #37373
  • Fix the issue that Region cache is not cleared properly after merging many Regions #37174
  • Fix the issue that the EXECUTE statement might throw an unexpected error in specific scenarios #37187
  • Fix the issue that GROUP CONCAT with ORDER BY might fail when the ORDER BY clause contains a correlated subquery #18216
  • Fix wrong results returned when length and width are incorrectly set for Decimal and Real when using plan cache #29565

• PD

  • Fix the issue that PD cannot correctly handle dashboard proxy requests #5321
  • Fix the issue that the TiFlash learner replica might not be created in specific scenarios #5401
  • Fix inaccurate Stream timeout and accelerate leader switchover #5207

• TiFlash

  • Fix the issue that logical operators return wrong results when the argument type is UInt8 #6127
  • Fix the issue that TiFlash bootstrap fails when 0.0 is used as the default value for integers, for example, `i` int(11) NOT NULL DEFAULT '0.0' #3157

• Tools

  • Dumpling

    • Fix the issue that Dumpling cannot dump data when the --compress option and the S3 output directory are set simultaneously #30534

  • TiCDC

    • Fix the issue that changefeed state is incorrect because a MySQL-related error is not reported to the owner in time #6698