> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/release-notes/community-server/old-releases/10.1/10.1.46.md).

# MariaDB 10.1.46 Release Notes

The most recent release of [MariaDB 10.1](/docs/release-notes/community-server/old-releases/10.1/changes-improvements-in-mariadb-10-1.md) is:[**MariaDB 10.1.48**](/docs/release-notes/community-server/old-releases/10.1/10.1.48.md) Stable (GA) [Download Now](https://downloads.mariadb.org/mariadb/10.1.48/)

[Download](https://downloads.mariadb.org/mariadb/10.1.46/) | [Release Notes](/docs/release-notes/community-server/old-releases/10.1/10.1.46.md) | [Changelog](/docs/release-notes/community-server/changelogs/changelogs-mariadb-101-series/mariadb-10146-changelog.md) | [Overview of 10.1](/docs/release-notes/community-server/old-releases/10.1/changes-improvements-in-mariadb-10-1.md)

**Release date:** 10 Aug 2020

[MariaDB 10.1](/docs/release-notes/community-server/old-releases/10.1/changes-improvements-in-mariadb-10-1.md) is a previous stable series of MariaDB. It is an evolution of [MariaDB 10.0](/docs/release-notes/community-server/old-releases/10.0/changes-improvements-in-mariadb-10-0.md) with several entirely new features not found anywhere else and with backported and reimplemented features from MySQL 5.6 and 5.7.

[MariaDB 10.1.46](/docs/release-notes/community-server/old-releases/10.1/10.1.46.md) is a [***Stable (GA)***](/docs/release-notes/community-server/about/release-criteria.md) release.

**For an overview of** [**MariaDB 10.1**](/docs/release-notes/community-server/old-releases/10.1/changes-improvements-in-mariadb-10-1.md) **see the**[**What is MariaDB 10.1?**](/docs/release-notes/community-server/old-releases/10.1/changes-improvements-in-mariadb-10-1.md) **page.**

Thanks, and enjoy MariaDB!

## Notable Changes

### Variables

* Limit [innodb\_encryption\_threads](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md#innodb_encryption_threads) to 255 ([MDEV-22258](https://jira.mariadb.org/browse/MDEV-22258)).
* Minimum value of [max\_sort\_length](/docs/server/server-management/variables-and-modes/server-system-variables.md#max_sort_length) raised to 8 (previously 4) so fixed size [data types](/docs/server/reference/data-types.md) like [DOUBLE](/docs/server/reference/data-types/numeric-data-types/double.md) and [BIGINT](/docs/server/reference/data-types/numeric-data-types/bigint.md) are not truncated for lower values of max\_sort\_length ([MDEV-22715](https://jira.mariadb.org/browse/MDEV-22715)).

### InnoDB

* [Innodb](/docs/server/server-usage/storage-engines/innodb.md) updated to 5.6.49
* Fixed corruption in delete buffering ([MDEV-22497](https://jira.mariadb.org/browse/MDEV-22497))
* Fixed a deadlock in FLUSH TABLES…FOR EXPORT ([MDEV-22890](https://jira.mariadb.org/browse/MDEV-22890))
* InnoDB data file extension is not crash-safe ([MDEV-23190](https://jira.mariadb.org/browse/MDEV-23190))
* Minor fixes related to encryption and FULLTEXT INDEX
* Crash recovery fix ([MDEV-23190](https://jira.mariadb.org/browse/MDEV-23190))

### Replication

* Make the binlog dump thread to log into errorlog a requested GTID position ([MDEV-20428](https://jira.mariadb.org/browse/MDEV-20428))
* Fix stop of the optimistic parallel slave at requested START-SLAVE-UNTIL position ([MDEV-15152](https://jira.mariadb.org/browse/MDEV-15152))
* Properly handle `RESET MASTER TO` value, when the value exceeds the max allowed `2147483647` ([MDEV-22451](https://jira.mariadb.org/browse/MDEV-22451))
* Correct 'relay-log.info' updating by concurrent parallel workers ([MDEV-22806](https://jira.mariadb.org/browse/MDEV-22806))
* Eliminate deadlock involving parallel workers, `STOP SLAVE` and `FLUSH TABLES WITH READ LOCK` ([MDEV-23089](https://jira.mariadb.org/browse/MDEV-23089))

### Optimizer

* ALTER TABLE ... ANALYZE PARTITION ... with EITS reads and locks all rows ... ([MDEV-21472](https://jira.mariadb.org/browse/MDEV-21472))
* 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 ([MDEV-22665](https://jira.mariadb.org/browse/MDEV-22665))
* `LATERAL DERIVED` is not clearly visible in `EXPLAIN FORMAT=JSON`, make `LATERAL DERIVED` tables visible in `EXPLAIN FORMAT=JSON` output ([MDEV-17568](https://jira.mariadb.org/browse/MDEV-17568))

### Other

* [div\_precision\_increment](/docs/server/server-management/variables-and-modes/server-system-variables.md#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](/docs/server/server-management/variables-and-modes/server-system-variables.md#div_precision_increment) ([MDEV-19232](https://jira.mariadb.org/browse/MDEV-19232))
* [XtraDB](/docs/server/server-usage/storage-engines/innodb.md) updated to 5.6.49-89.0
* TokuDB updated to 5.6.49-89.0
* MariaDB could crash after changing the query\_cache size ([MDEV-5924](https://jira.mariadb.org/browse/MDEV-5924))
* Errors and SIGSEGV on CREATE TABLE w/ various charsets ([MDEV-22111](https://jira.mariadb.org/browse/MDEV-22111))
* Crash in `CREATE TABLE AS SELECT` when the precision of returning type = 0 ([MDEV-22502](https://jira.mariadb.org/browse/MDEV-22502))
* XA: Reject DDL operations between PREPARE and COMMIT ([MDEV-22420](https://jira.mariadb.org/browse/MDEV-22420))
* Fixes for the following [security vulnerabilities](/docs/server/security/cve.md):
  * [CVE-2021-2022](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-2022)

## Changelog

For a complete list of changes made in [MariaDB 10.1.46](/docs/release-notes/community-server/old-releases/10.1/10.1.46.md) with links to detailed information on each push, see the [changelog](/docs/release-notes/community-server/changelogs/changelogs-mariadb-101-series/mariadb-10146-changelog.md).

## Contributors

For a full list of contributors to [MariaDB 10.1.46](/docs/release-notes/community-server/old-releases/10.1/10.1.46.md), see the [MariaDB Foundation release announcement](https://mariadb.org/mariadb-10-5-5-10-4-14-10-3-24-10-2-33-and-10-1-46-now-available/).

A file format compatibility bug that was introduced in [MariaDB 10.1.0](/docs/release-notes/community-server/old-releases/10.1/10.1.0.md) was fixed in [MariaDB 10.1.21](/docs/release-notes/community-server/old-releases/10.1/10.1.21.md).\
Using [page\_compression](/docs/server/server-usage/storage-engines/innodb/innodb-page-compression.md) or non-default [innodb\_page\_size](/docs/server/server-usage/storage-engines/innodb/innodb-system-variables.md) created files that were incompatible with [MariaDB 10.0](/docs/release-notes/community-server/old-releases/10.0/changes-improvements-in-mariadb-10-0.md) or MySQL 5.6. [MariaDB 10.1.21](/docs/release-notes/community-server/old-releases/10.1/10.1.21.md) and higher will convert affected files from earlier [MariaDB 10.1](/docs/release-notes/community-server/old-releases/10.1/changes-improvements-in-mariadb-10-1.md) releases to a compatible format.**This prevents a downgrade to earlier** [**MariaDB 10.1**](/docs/release-notes/community-server/old-releases/10.1/changes-improvements-in-mariadb-10-1.md) **versions.**[See the commit for details.](https://github.com/MariaDB/server/commit/ab1e6fefd869242d962cb91a006f37bb9ad534a7)

{% hint style="info" %}
Be notified of new MariaDB Server releases automatically by [subscribing](https://lists.mariadb.org/postorius/lists/announce.lists.mariadb.org/) to the MariaDB Foundation community announce 'at' lists.mariadb.org announcement list (this is a low traffic, announce-only list). MariaDB plc customers will be notified for all new releases, security issues and critical bug fixes for all MariaDB plc products thanks to the Notification Services.

MariaDB may already be included in your favorite OS distribution. More information can be found on the [Distributions which Include MariaDB](/docs/general-resources/distributions-including-mariadb.md) page.
{% endhint %}

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