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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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min() and max() functions are implemented in MySQL as macros. This means that max(a,b) is expanded to: ((a) > (b) ? (a) : (b)) Note how 'a' is quoted two times. Now imagine 'a' is a recursive function call that's several 10s of levels deep. And the recursive function does max() with a function arg as well to dive into recursion. This means that simple function call can take most of the clock time. Identified and fixed several such calls to max()/min() : including the IF() sql function implementation. |
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| extra | ||
| heap | ||
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| innobase | ||
| libmysql | ||
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| man | ||
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| sql-common | ||
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| configure.in | ||
| COPYING | ||
| EXCEPTIONS-CLIENT | ||
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| Makefile.am | ||
| 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.