> 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/connectors/c/changelogs/3.1/3.1.21.md).

# Connector/C 3.1.21 Changelog

Full changelog for MariaDB Connector/C 3.1.21, listing every commit in the release.

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<p align="center">The most recent release of <a href="/docs/connectors/mariadb-connector-c.md">MariaDB Connector/C</a> is: <a href="/docs/release-notes/connectors/c/3.4/3.4.11.md"><strong>3.4.11</strong></a></p>

<p align="center"><a href="https://mariadb.com/downloads/connectors/connectors-data-access/c-connector" class="button primary">Download Connector/C 3.4.11</a></p>
{% endhint %}

[Download](https://mariadb.com/downloads/connectors)[Release Notes](/docs/release-notes/connectors/c/3.1/3.1.21.md)[Changelog](/docs/release-notes/connectors/c/changelogs/3.1/3.1.21.md)[About MariaDB Connector/C](/docs/connectors/mariadb-connector-c.md)

**Release date:** 22 May 2023

For the highlights of this release, see the [release notes](/docs/release-notes/connectors/c/3.1/3.1.21.md).

The revision number links will take you to the revision's page on GitHub. On [GitHub](https://github.com/MariaDB/mariadb-connector-c/) you can view more details of the revision and view diffs of the code modified in that revision.

* [Revision #a3bba46](https://github.com/mariadb-corporation/mariadb-connector-c/commit/a3bba46)\
  2023-05-02 17:59:18 +0200
  * [CONC-619](https://jira.mariadb.org/browse/CONC-619): NULL pointer dereference in unpack\_fields
* [Revision #f5a4c73](https://github.com/mariadb-corporation/mariadb-connector-c/commit/f5a4c73)\
  2023-04-26 08:10:08 +0200
  * Fix memory leak in unittest
* [Revision #2c5bb13](https://github.com/mariadb-corporation/mariadb-connector-c/commit/2c5bb13)\
  2023-04-25 16:40:53 +0200
  * Updated zlib library - version 1.2.13
* [Revision #b0ec210](https://github.com/mariadb-corporation/mariadb-connector-c/commit/b0ec210)\
  2023-04-24 14:58:01 +0200
  * Test fixes when testing against MySQL
* [Revision #6c29921](https://github.com/mariadb-corporation/mariadb-connector-c/commit/6c29921)\
  2023-04-22 06:56:53 +0200
  * travis fix:
* [Revision #0e452f6](https://github.com/mariadb-corporation/mariadb-connector-c/commit/0e452f6)\
  2023-04-21 07:11:29 +0200
  * MariaDB Server detection fix
* [Revision #11ba413](https://github.com/mariadb-corporation/mariadb-connector-c/commit/11ba413)\
  2023-04-21 06:55:56 +0200
  * Travis fix
* [Revision #2000b06](https://github.com/mariadb-corporation/mariadb-connector-c/commit/2000b06)\
  2023-04-11 18:31:19 +0200
  * Replace SET\_CLIENT\_STMT\_ERROR by stmt\_set\_error().
* [Revision #5a94570](https://github.com/mariadb-corporation/mariadb-connector-c/commit/5a94570)\
  2023-04-05 09:01:25 +0200
  * Fix for [CONC-635](https://jira.mariadb.org/browse/CONC-635): Disable TLS/SSL for named pipe/shared mem
* [Revision #2740335](https://github.com/mariadb-corporation/mariadb-connector-c/commit/2740335)\
  2023-04-01 18:12:37 +0200
  * Fix error macros range checking
* [Revision #17d4f38](https://github.com/mariadb-corporation/mariadb-connector-c/commit/17d4f38)\
  2023-03-30 13:30:53 +0200
  * Fix for [CONC-642](https://jira.mariadb.org/browse/CONC-642): Set CR\_OUT\_OF\_MEMORY error
* [Revision #4e2408c](https://github.com/mariadb-corporation/mariadb-connector-c/commit/4e2408c)\
  2023-02-28 19:58:15 +0100
  * [CONC-637](https://jira.mariadb.org/browse/CONC-637) Build fails when specifying -DPLUGIN\_AUTH\_GSSAPI\_CLIENT=OFF
* [Revision #000415a](https://github.com/mariadb-corporation/mariadb-connector-c/commit/000415a)\
  2023-02-21 10:20:06 +0100
  * Fix for PR-210:
* [Revision #516dd92](https://github.com/mariadb-corporation/mariadb-connector-c/commit/516dd92)\
  2023-02-18 09:08:15 +0100
  * Merge pull request #210 from heirecka/3.3
* [Revision #931e8f3](https://github.com/mariadb-corporation/mariadb-connector-c/commit/931e8f3)\
  2023-02-08 15:05:09 +0100
  * travis:
* [Revision #0064a89](https://github.com/mariadb-corporation/mariadb-connector-c/commit/0064a89)\
  2023-02-08 14:22:49 +0100
  * Travis:
* [Revision #669726a](https://github.com/mariadb-corporation/mariadb-connector-c/commit/669726a)\
  2023-02-08 12:21:22 +0100
  * Fix for [CONC-633](https://jira.mariadb.org/browse/CONC-633):
* [Revision #75439c0](https://github.com/mariadb-corporation/mariadb-connector-c/commit/75439c0)\
  2023-02-08 11:46:39 +0100
  * [CONC-632](https://jira.mariadb.org/browse/CONC-632)
* [Revision #c517976](https://github.com/mariadb-corporation/mariadb-connector-c/commit/c517976)\
  2023-02-08 10:42:46 +0100
  * Travis:
* [Revision #4733ee7](https://github.com/mariadb-corporation/mariadb-connector-c/commit/4733ee7)\
  2023-02-07 16:11:19 -0500
  * bump the VERSION
* [Revision #4b90f8f](https://github.com/mariadb-corporation/mariadb-connector-c/commit/4b90f8f)\
  2023-02-07 16:07:46 -0500
  * bump the VERSION

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