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release-3.0.18.md

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TiDB 3.0.18 Release Notes
TiDB 3.0.18 was released on August 21, 2020. The release includes improvements to TiDB Binlog and bug fixes for TiDB and TiKV. Bug fixes for TiDB include issues with handling decimal, set, and enum types, as well as problems with duplicate keys and cached execution plans. TiKV's bug fix involves changing the GC failure log level. TiDB Lightning also received fixes for issues with the log file argument, syntax errors, and unexpected calls.

TiDB 3.0.18 Release Notes

Release date: August 21, 2020

TiDB version: 3.0.18

Improvements

  • Tools

    • TiDB Binlog

      • Support the time duration format of Go for the Pump GC configuration #996

Bug Fixes

  • TiDB

    • Fix the issue that the wrong handling of the decimal type by the Hash function causes the wrong HashJoin result #19185
    • Fix the issue that the wrong handling of the set and enum types by the Hash function causes the wrong HashJoin result #19175
    • Fix the issue that the check for duplicate keys fails in the pessimistic locking mode #19236
    • Fix the issue that the Apply and Union Scan operators cause the wrong execution result #19297
    • Fix the issue that some cached execution plans are incorrectly executed in transaction #19274

  • TiKV

    • Change the GC failure log from error to the warning level #8444

  • Tools

    • TiDB Lightning

      • Fix the issue that the --log-file argument does not take effect #345
      • Fix the syntax error on empty binary/hex literals when using TiDB-backend #357
      • Fix the unexpected switch-mode call when using TiDB-backend #368