- MariaDB\ 71.8%
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e1d31a10afThe existing (incorrect) overriding mechanism is: Non-minus-one var value overrides table param overrides default value. Before MDEV-27169, unspecified var value is -1. So if the user sets both the var to be a value other than -1 and the table param, the var value will prevail, which is incorrect. After MDEV-27169, unspecified var value is default value. So if the user does not set the var but sets the table param, the default value will prevail, which is even more incorrect. This patch fixes it so that table param, if specified, always overrides var value, and the latter if not specified or set to -1, falls back to the default value We achieve this by replacing all such overriding in spd_param.cc with macros that override in the correct way, and removing all the "overriding -1" lines involving table params in spider_set_connect_info_default() except for those table params not defined as sysvar/thdvar in spd_params.cc We also introduced macros for non-overriding sysvar and thdvar, so that the code is cleaner and less error-prone In server versions where MDEV-27169 has not been applied, we also backport the patch, that is, replacing -1 default values with real default values In server versions where MDEV-28006 has not been applied, we do the same for udf params |
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Code status:
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MariaDB: drop-in replacement for MySQL
MariaDB is designed as a drop-in replacement of MySQL(R) with more features, new storage engines, fewer bugs, and better performance.
MariaDB is brought to you by the MariaDB Foundation and the MariaDB corporation. Please read the CREDITS file for details about the MariaDB Foundation, and who is developing MariaDB.
MariaDB is developed by many of the original developers of MySQL who now work for the MariaDB Corporation, the MariaDB Foundation and by many people in the community.
MySQL, which is the base of MariaDB, is a product and trademark of Oracle Corporation, Inc. For a list of developers and other contributors, see the Credits appendix. You can also run 'SHOW authors' to get a list of active contributors.
A description of the MariaDB project and a manual can be found at:
https://mariadb.com/kb/en/mariadb-vs-mysql-features/
https://mariadb.com/kb/en/mariadb-versus-mysql-compatibility/
https://mariadb.com/kb/en/library/new-and-old-releases/
As MariaDB is a full replacement of MySQL, the MySQL manual at http://dev.mysql.com/doc is generally applicable.
Help
More help is available from the Maria Discuss mailing list https://launchpad.net/~maria-discuss and the #maria IRC channel on Freenode.
Live QA for beginner contributors
MariaDB has a dedicated time each week when we answer new contributor questions live on Zulip and IRC. From 8:00 to 10:00 UTC on Mondays, and 10:00 to 12:00 UTC on Thursdays, anyone can ask any questions they’d like, and a live developer will be available to assist.
New contributors can ask questions any time, but we will provide immediate feedback during that interval.
Licensing
NOTE:
MariaDB is specifically available only under version 2 of the GNU General Public License (GPLv2). (I.e. Without the "any later version" clause.) This is inherited from MySQL. Please see the README file in the MySQL distribution for more information.
License information can be found in the COPYING file. Third party license information can be found in the THIRDPARTY file.
Bug Reports
Bug and/or error reports regarding MariaDB should be submitted at: https://jira.mariadb.org
For reporting security vulnerabilities see: https://mariadb.org/about/security-policy/
Bugs in the MySQL code can also be submitted at: https://bugs.mysql.com
The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server