MariaDB 10.2.33 Release Notes
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.
Thanks, and enjoy MariaDB!
- Limit innodb_encryption_threads to 255 (MDEV-22258).
- Minimum value of max_sort_length raised to 8 (previously 4) so fixed size data types like DOUBLE and BIGINT are not truncated for lower values of max_sort_length (MDEV-22715).
- InnoDB updated to 5.7.29
- Fixed corruption in delete buffering (MDEV-22497)
- Fixed a deadlock in FLUSH TABLES…FOR EXPORT (MDEV-22890)
- InnoDB data file extension is not crash-safe (MDEV-23190)
- 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=OFFis 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)
- Make the binlog dump thread to log into errorlog a requested GTID position (MDEV-20428)
- Fix stop of the optimistic parallel slave at requested START-SLAVE-UNTIL position (MDEV-15152)
- Properly handle
RESET MASTER TOvalue, when the value exceeds the max allowed
- Correct 'relay-log.info' updating by concurrent parallel workers (MDEV-22806)
- Eliminate deadlock involving parallel workers,
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)
- ALTER TABLE ... ANALYZE PARTITION ... with EITS reads and locks all rows ... (MDEV-21472)
- Print ranges in the optimizer trace created for non-indexed columns when
optimizer_use_condition_selectivity >2Now the optimizer trace shows the ranges constructed while getting estimates from EITS (MDEV-22665)
LATERAL DERIVEDis not clearly visible in
EXPLAIN FORMAT=JSON, make
LATERAL DERIVEDtables visible in
EXPLAIN FORMAT=JSONoutput (MDEV-17568)
- Crash on
WITH RECURSIVElarge query (MDEV-22748)
- Crash with Prepared Statement with a '?' parameter inside a re-used CTE (MDEV-22779)
- div_precision_increment 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 div_precision_increment (MDEV-19232)
- MariaDB could crash after changing the query_cache size (MDEV-5924)
- Errors and SIGSEGV on CREATE TABLE w/ various charsets (MDEV-22111)
- Crash in
CREATE TABLE AS SELECTwhen the precision of returning type = 0 (MDEV-22502)
- XA: Reject DDL operations between PREPARE and COMMIT (MDEV-22420)
mariabackup --prepareon errors during innodb redo log applying (MDEV-22354)
- Server crashes in
mysql_alter_tableupon adding a non-null date column under
- Can't uninstall plugin if the library file doesn't exist (MDEV-21258)
Upgrading from 10.2 versions earlier than 10.2.17 is highly recommended
for all Galera users due to bug MDEV-12837 which caused serious stability
issues with earlier versions. See the bug issue page for more information.
When upgrading from MariaDB 10.2.16 or earlier to MariaDB 10.2.17 or higher,
running mysql_upgrade is required due to changes introduced in MDEV-14637.
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