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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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This bug was intruduced by the fix for bug#17212 (in 4.1). It is not ok to call test_if_skip_sort_order since this function will alter the execution plan. By contract it is not ok to call test_if_skip_sort_order in this context. This bug appears only in the case when the optimizer has chosen an index for accessing a particular table but finds a covering index that enables it to skip ORDER BY. This happens in test_if_skip_sort_order. mysql-test/r/key.result: Bug#24778 test case. The bug causes the result to be the empty set. mysql-test/t/key.test: Bug#24778 The minimal test case that reveals the bug. The reason for such a complicated schema is that we have to convince the optimizer to pick one index, then discard it in order to be able to skip ORDER BY. sql/sql_select.cc: bug#24778 Removed the call to test_if_skip_sort_order that constituted the bug. |
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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.