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TiDB 3.0.16 Release Notes

Release date: July 03, 2020

TiDB version: 3.0.16

Improvements

  • TiDB

    • Support the is null filter condition in hash partition pruning #17308
    • Assign different Backoffers to each Region to avoid the SQL timeout issue when multiple Region requests fail at the same time #17583
    • Split separate Regions for the newly added partition #17668
    • Discard feedbacks generated from the delete or update statement #17841
    • Correct the usage of json.Unmarshal in job.DecodeArgs to be compatible with future Go versions #17887
    • Remove sensitive information in the slow query log and the statement summary table #18128
    • Match the MySQL behavior with DateTime delimiters #17499
    • Handle %h in date formats in the range that is consistent with MySQL #17496

  • TiKV

    • Avoid sending store heartbeats to PD after snapshots are received #8145
    • Improve the PD client log #8091

Bug Fixes

  • TiDB

    • Fix the data inconsistency issue occurred because the lock of a written and deleted primary key in one transaction is resolved by another transaction #18248
    • Fix the Got too many pings gRPC error log in the PD server-side followers #17944
    • Fix the panic issue that might occur when the child of HashJoin returns the TypeNull column #17935
    • Fix the error message when access is denied #17722
    • Fix JSON comparison issue for the int and float types #17715
    • Update the failpoint which causes data race #17710
    • Fix the issue that the timeout pre-split Regions might not work when creating tables #17617
    • Fix the panic caused by ambiguous error messages after the sending failure #17378
    • Fix the issue that FLASHBACK TABLE might fail in some special cases #17165
    • Fix the issue of inaccurate range calculation results when statements only have string columns #16658
    • Fix the query error occurred when the only_full_group_by SQL mode is set #16620
    • Fix the issue that the field length of results returned from the case when function is inaccurate #16562
    • Fix the type inference for the decimal property in the count aggregate function #17702

  • TiKV

    • Fix the potential wrong result read from ingested files #8039
    • Fix the issue that a peer cannot be removed when its store is isolated during multiple merge processes #8005

  • PD

    • Fix the 404 error when querying Region keys in PD Control #2577
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