TiDB - v5.4.2

Improvements

• Avoid sending requests to unhealthy TiKV nodes to improve availability #34906

Bug Fixes

• Fix the issue of wrong TableDual plans cached in binary protocol #34690 #34678
• Fix the issue of incorrectly inferred null flag of the TiFlash firstrow aggregate function in the EqualAll case #34584
• Fix the issue that the planner generates wrong 2-phase aggregate plan for TiFlash #34682
• Fix the planner wrong behaviors that occur when tidb_opt_agg_push_down and tidb_enforce_mpp are enabled #34465
• Fix the wrong memory-usage value used when Plan Cache is evicted #34613
• Fix the issue that the column list does not work in the LOAD DATA statement #35198
• Avoid reporting WriteConflict errors in pessimistic transactions #11612
• Fix the issue that the prewrite requests are not idempotency when Region errors and network issues occur #34875
• Fix the issue that the async commit transactions being rolled back might not meet atomicity #33641
• Previously, when a network connectivity issue occurred, TiDB did not always correctly free the resources held by the disconnected session. This issue has been fixed so that open transactions can be rolled back and other associated resources can be released. #34722
• Fix the issue that the references invalid table error might be incorrectly reported when TiDB queries views with CTE #33965
• Fix the panic issue caused by the fatal error: concurrent map read and map write error #35340
• Fix the error that occurs when reading from the INFORMATION_SCHEMA.ATTRIBUTES table by skipping the unidentifiable table attributes #33665