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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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When the Item_cond::fix_fields() function reduces cond tree, it in loop scans it's own list and when it founds Item_cond with same function (AND or OR) it does next things: 1) replaces that item with item's list. 2) empties item's list. Due to this operation is done twice - for update and for view, at the update phase cond's list of lower view is already empty. Empty list returns ref to itself, thus making endless loop by replacing list with itself, emptying, replacing again and so on. This results in server hung up. To the Item_cond::fix_fields() function added check that ensures that list being replaced with isn't empty. mysql-test/t/view.test: Added test for bug#17726: Not checked empty list caused endless loop mysql-test/r/view.result: Added test for bug#17726: Not checked empty list caused endless loop sql/item_cmpfunc.cc: Fixed bug#17726: Not checked empty list caused endless loop To the Item_cond::fix_fields() function added check that ensures that list being replaced with isn't empty. |
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| extra | ||
| heap | ||
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| innobase | ||
| libmysql | ||
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| sql-common | ||
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| .bzrignore | ||
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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. - For commercial distributions, see the MySQLEULA.txt 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 Installation chapter. - For future plans, see the TODO appendix. - For the new features/bugfix history, see the News appendix. - For the currently known bugs/misfeatures (known errors) see the problems 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.