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MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
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d4042af885
The optimizer sets index traversal in reverse order only if there are used key parts that are not compared to a constant. However using the primary key as an ORDER BY suffix rendered the check incomplete : going in reverse order must still be used even if all the parts of the secondary key are compared to a constant. Fixed by relaxing the check and set reverse traversal even when all the secondary index keyparts are compared to a const. Also account for the case when all the primary keys are compared to a constant. mysql-test/include/mix1.inc: Bug #31001: test case mysql-test/r/innodb_mysql.result: Bug #31001: test case sql/sql_select.cc: Bug #31001: - account for the case when all the primary key parts are compared to a constant. - force test_if_skip_sort_order to go backwards over the key even when the number of keyparts used is the same as the number of keyparts equal to a constant. (because of the primary key suffix). |
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| README | ||
This is a release of MySQL, a dual-license SQL database server. MySQL is brought to you by the MySQL team at MySQL AB. License information can be found in these files: - For GPL (free) distributions, see the COPYING file and the EXCEPTIONS-CLIENT file. - For commercial distributions, see the LICENSE.mysql file. For further information about MySQL or additional documentation, see: - The latest information about MySQL: http://www.mysql.com - The current MySQL documentation: http://dev.mysql.com/doc Some manual sections of special interest: - If you are migrating from an older version of MySQL, please read the "Upgrading from..." section first! - To see what MySQL can do, take a look at the features section. - For installation instructions, see the Installing and Upgrading chapter. - For the new features/bugfix history, see the Change History appendix. - For the currently known bugs/misfeatures (known errors) see the Problems and Common Errors appendix. - For a list of developers and other contributors, see the Credits appendix. A local copy of the MySQL Reference Manual can be found in the Docs directory in GNU Info format. You can also browse the manual online or download it in any of several formats at the URL given earlier in this file. ************************************************************ IMPORTANT: Bug or error reports should be sent to http://bugs.mysql.com.