tidb v3.0.17 Release Notes

Release Date: 2020-08-03 // over 3 years ago
  • ๐Ÿ‘Œ Improvements

    • Ease the impact of statistics feedback on the cluster #18770
    • Limit batch split count for one request #18694
    • ๐Ÿ‘ท Accelerate /tiflash/replica HTTP API when there are many history DDL jobs in the TiDB cluster #18386
    • ๐Ÿ‘Œ Improve row count estimation for index equal condition #17609
    • Speed up the execution of kill tidb conn_id #18506

    ๐Ÿ› Bug Fixes

    • Return the actual error message instead of an empty set when a query which contains IndexHashJoin or IndexMergeJoin encounters a panic #18498
    • ๐Ÿ›  Fix the unknown column error for SQL statements like SELECT a FROM t HAVING t.a #18432
    • Forbid adding a primary key for a table when the table has no primary key or when the table already has an integer primary key #18342
    • Return an empty set when executing EXPLAIN FORMAT="dot" FOR CONNECTION #17157
    • Fix STR_TO_DATE's handling for format token '%r', '%h' #18725