MariaDB 10.5.20 Release Notes

Download Release Notes Changelog Overview of 10.5

Release date: 10 May 2023

MariaDB 10.5 is a previous stable series of MariaDB, maintained until June 2025. It is an evolution of MariaDB 10.4 with several entirely new features not found anywhere else and with backported and reimplemented features from MySQL.

MariaDB 10.5.20 is a Stable (GA) release.

For an overview of MariaDB 10.5 see theWhat is MariaDB 10.5? page.

Thanks, and enjoy MariaDB!

Notable Items

InnoDB

• Crash on in a table ()

• UNIQUE USING HASH accepts duplicate entries for tricky collations ()

• rec_get_offsets() is not optimal ()

• Performance regression in fil_space_t::try_to_close() introduced in ()

Backup

• mariadb-backup doesn't utilise innodb-undo-log-directory (if specified as a relative path) during copy-back operation ()

• mariadb-backup issues error messages during InnoDB tablespaces export on partial backup preparing ()

• mariadb-backup does not copy Aria logs if aria_log_dir_path is used ()

• Race condition between buffer pool flush and log file deletion in mariadb-backup --prepare ()

Replication

• Fixed a deadlock on parallel slave involving full image Write event on the sequence engine ()

• Fixed an attempted out-of-order binlogging error on slave involving ALTER on the sequence engine ()

• Corrected non-versioned master to versioned slave replication on no-unique attribute table ()

• Mended encrypted binlog master to error out to gtid-mode slave when master could not decrypt a binlog file ()

Optimizer

• optimization is improved to re-fill the materialized table only if necessary. The fewer number of table refills is taken into account when choosing query plan, too ().

• Queries using SELECT DISTINCT some_expression(aggregate_function()) could produce wrong query result. ()

• A GROUP BY query with MIN(primary_key) in select list and primary_key<>const in the WHERE could produce wrong result when executed with "Using index for group-by" strategy ()

Docker Official Images

• Add replication setup to containers contributed by Md Sahil ()

Security

• Fixes for the following :

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 .