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MariaDB 10.2.33 Release Notes

The most recent release of MariaDB 10.2 is:MariaDB 10.2.44 Stable (GA) Download Now

Download | Release Notes | Changelog | Overview of 10.2

Release date: 10 Aug 2020

MariaDB 10.2 is a previous stable series of MariaDB. It is an evolution of MariaDB 10.1 with several entirely new features not found anywhere else and with backported and reimplemented features from MySQL 5.6 and 5.7.

MariaDB 10.2.33 is a Stable (GA) release.

For an overview of MariaDB 10.2 see theWhat is MariaDB 10.2? page.

Thanks, and enjoy MariaDB!

Notable Changes

Variables

  • Limit to 255 ().

  • Minimum value of raised to 8 (previously 4) so fixed size like and are not truncated for lower values of max_sort_length ().

InnoDB

  • updated to 5.7.29

  • Fixed corruption in delete buffering ()

  • Fixed a deadlock in FLUSH TABLES…FOR EXPORT ()

  • InnoDB data file extension is not crash-safe ()

Replication

  • Make the binlog dump thread to log into errorlog a requested GTID position ()

  • Fix stop of the optimistic parallel slave at requested START-SLAVE-UNTIL position ()

  • Properly handle RESET MASTER TO value, when the value exceeds the max allowed 2147483647 ()

Optimizer

  • ALTER TABLE ... ANALYZE PARTITION ... with EITS reads and locks all rows ... ()

  • Print ranges in the optimizer trace created for non-indexed columns when optimizer_use_condition_selectivity >2 Now the optimizer trace shows the ranges constructed while getting estimates from EITS ()

  • LATERAL DERIVED is not clearly visible in EXPLAIN FORMAT=JSON, make LATERAL DERIVED

Other

  • is now taken into account for all intermediate calculations. Previously results could be unpredictable. Note that this means results will have a lower precision in some cases - see ()

  • MariaDB could crash after changing the query_cache size ()

  • Errors and SIGSEGV on CREATE TABLE w/ various charsets ()

  • Crash in CREATE TABLE AS SELECT

Upgrading from 10.2 versions earlier than 10.2.17 is highly recommended for all users due to bug which caused serious stability issues with earlier versions. See the bug issue page for more information. When upgrading from or earlier to or higher, running is required due to changes introduced in .

Changelog

For a complete list of changes made in with links to detailed information on each push, see the .

Contributors

For a full list of contributors to , see the .

Minor fixes related to encryption and FULLTEXT INDEX

  • Dropping the adaptive hash index may cause DDL to lock up InnoDB (MDEV-22456)

  • innodb_log_optimize_ddl=OFF is not crash safe (MDEV-21347)

  • Mariadb service won't shutdown when it's running and the OS datetime updated backwards (MDEV-17481)

  • Doublewrite recovery can corrupt data pages (MDEV-11799)

  • Fixed race conditions related to buffer pool resizing

  • Crash recovery fixes (MDEV-21347, MDEV-23190, MDEV-11799)

  • Correct 'relay-log.info' updating by concurrent parallel workers (MDEV-22806)
  • Eliminate deadlock involving parallel workers, STOP SLAVE and FLUSH TABLES WITH READ LOCK (MDEV-23089)

  • Correct master-slave automatic reconnection by slave to always pass through all steps of the initial connect. Specifically, do not skip master notification about slave binlog checksum awareness (MDEV-14203)

  • tables visible in
    EXPLAIN FORMAT=JSON
    output (
    )
  • Crash on WITH RECURSIVE large query (MDEV-22748)

  • Crash with Prepared Statement with a '?' parameter inside a re-used CTE (MDEV-22779)

  • when the precision of returning type = 0 (
    )
  • XA: Reject DDL operations between PREPARE and COMMIT (MDEV-22420)

  • Stop mariadb-backup --prepare on errors during innodb redo log applying (MDEV-22354)

  • Server crashes in mysql_alter_table upon adding a non-null date column under NO_ZERO_DATE with ALGORITHM=INPLACE (MDEV-18042)

  • Can't uninstall plugin if the library file doesn't exist (MDEV-21258)

  • Fixes for the following :

    • CVE-2021-2022

  • MDEV-22258
    MDEV-22715
    MDEV-22497
    MDEV-22890
    MDEV-23190
    MDEV-20428
    MDEV-15152
    MDEV-22451
    MDEV-21472
    MDEV-22665
    MDEV-19232
    MDEV-5924
    MDEV-22111
    Galera
    MDEV-12837
    MariaDB 10.2.16
    MariaDB 10.2.17
    MDEV-14637
    MariaDB 10.2.33
    changelog
    MariaDB 10.2.33
    MariaDB Foundation release announcement
    MDEV-17568
    MDEV-22502

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