MariaDB 10.6.9 Release Notes

Download 10.6.9 Release Notes Changelog Overview of 10.6

Release date: 15 Aug 2022

MariaDB 10.6 is the current long-term maintenance stable series of MariaDB. It is an evolution of MariaDB 10.5 with several entirely new features.

MariaDB 10.6.8 is a Stable (GA) release.

For an overview of MariaDB 10.6 see the What is MariaDB 10.6? page.

Thanks, and enjoy MariaDB!


Unfortunately, some bugs have been found post release, so this is updated to help avoid these issues if possible. All are fixed in MariaDB 10.6.10.

  • MDEV-29374 — a crash shortly after a page merge (can be triggered by an UPDATE or DELETE or, say, rollback of an INSERT) can cause data corruption
  • MDEV-29342 — if InnoDB table had a fulltext index and only one new row was inserted between the last sync (performed asynchronously by a dedicated thread) and server shutdown, the fulltext index wasn't properly updated and became out of sync with the data. Before 10.6.9 this happened silently, in 10.6.9 an assertion crashed the server after detecting the inconsistency.

Notable Items



  • explicit_defaults_for_timestamp is stored in binlog, so that CREATE TABLE on slave would always have the same effect as on master. (MDEV-29078)
  • ER_SLAVE_INCIDENT error is specified now on slave to be seen with SHOW-SLAVE-STATUS (MDEV-21087)
  • INCIDENT_EVENT is no longer binlogged when a being logged transaction can be safely rolledback (MDEV-21443)
  • sequences related row-format events are made to correspond to binlog_row_image (MDEV-28487)
  • Possible reason of FLUSH BINARY LOGS hang is eliminated (MDEV-28948)
  • Fix out-of-order gtid error in the circular semisync setup (MDEV-28609)


  • Possible to write/update with read_only=ON and not a SUPER privilege (MDEV-28546)
  • Node crashes with Transport endpoint is not connected mysqld got signal 6 (MDEV-25068)
  • Galera4 not able to report proper wsrep_incoming_addresses (MDEV-20627)
  • Galera should replicate nextval()-related changes in sequences with INCREMENT <> 0, at least NOCACHE ones with engine=InnoDB (MDEV-27862)
  • Add support for OpenSSL 3.0 in Galera (MDEV-25949)


  • Server crash in JOIN_CACHE::free or in copy_fields (MDEV-23809)
    • Queries that use DISTINCT and an always-constant function like COLLATION(aggegate_func(...)) could cause a server crash. Note that COLLATION() is a special function - its value is constant even if its argument is not costant.
  • Crash when using ANY predicand with redundant subquery in GROUP BY clause (MDEV-29139)
    • A query with a subuquery in this form could cause a crash:
... ANY (SELECT ... GROUP BY (SELECT redundant_subselect_here)) ...
  • MariaDB Server SEGV on INSERT .. SELECT (MDEV-26427)
    • Certain queries in form "INSERT ... SELECT with_aggregate_or_window_func" could cause a crash.
  • restore_prev_nj_state() doesn't update cur_sj_inner_tables correctly (MDEV-28749)
    • Subquery semi-join optimization could miss LooseScan or FirstMatch strategies for certain queries.
  • Optimizer uses all partitions after upgrade to 10.3 (MDEV-28246)
    • For multi-table UPDATE or DELETE queries, the optimizer failed to apply Partition Pruning optimization for the table that is updated or deleted from.
  • Range optimizer regression for key IN (const, ....) (MDEV-25020)
    • The issue can be observed on MariaDB 10.5.9 and later versions which have the fix for MDEV-9750. That fix introduceds optimizer_max_sel_arg_weight.
    • If one sets optimizer_max_sel_arg_weight to a very high value or zero (which means "unlimited") and runs queries that produce heavy-weight graphs, they can observe a performance slowdown, e.g.:
table.keyXpartY [NOT] IN ( ... )
  • Wrong result with table elimination combined with not_null_range_scan (MDEV-28858)
    • If one runs with optimizer_switch='not_null_range_scan=on' (which is not enabled by default), a query that does a join and has const tables could produce a wrong result.


  • Backport OpenSSL-3.0 compatibility to 10.6 branch (MDEV-28133)



mariadb Client

  • New mariadb client option, -enable-cleartext-plugin. Option does not do anything, and is for MySQL-compatibility purposes only.




For a complete list of changes and bugfixes made in MariaDB 10.6.9, with links to detailed information on each push, see the changelog.


For a full list of contributors to MariaDB 10.6.9, see the MariaDB Foundation release announcement.

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MariaDB may already be included in your favorite OS distribution. More information can be found on the Distributions which Include MariaDB page.


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