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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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is involved. The Arg_comparator::compare_datetime() comparator caches its arguments if they are constants i.e. const_item() returns true. The Item_func_get_user_var::const_item() returns true or false based on the current query_id and the query_id where the variable was created. Thus even if a query can change its value its const_item() still will return true. All this leads to a wrong comparison result when an object of the Item_func_get_user_var class is involved. Now the Arg_comparator::can_compare_as_dates() and the get_datetime_value() functions never cache result of the GET_USER_VAR() function (the Item_func_get_user_var class). mysql-test/t/type_datetime.test: A test case is added for the bug#28261: Wrong DATETIME comparison result when the GET_USER_VAR function is involved. mysql-test/r/type_datetime.result: A test case is added for the bug#28261: Wrong DATETIME comparison result when the GET_USER_VAR function is involved. sql/item_cmpfunc.cc: Bug#28261: Wrong DATETIME comparison result when the GET_USER_VAR function is involved. Now the Arg_comparator::can_compare_as_dates() and the get_datetime_value() functions never cache result of the GET_USER_VAR() function (the Item_func_get_user_var class). |
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| BUILD | ||
| client | ||
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| config/ac-macros | ||
| dbug | ||
| debian | ||
| Docs | ||
| extra | ||
| heap | ||
| include | ||
| innobase | ||
| libmysql | ||
| libmysql_r | ||
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| man | ||
| myisam | ||
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| mysql-test | ||
| mysys | ||
| ndb | ||
| netware | ||
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| pstack | ||
| regex | ||
| scripts | ||
| server-tools | ||
| sql | ||
| sql-bench | ||
| sql-common | ||
| SSL | ||
| strings | ||
| support-files | ||
| tests | ||
| tools | ||
| VC++Files | ||
| vio | ||
| win | ||
| zlib | ||
| .bzrignore | ||
| .cvsignore | ||
| CMakeLists.txt | ||
| configure.in | ||
| COPYING | ||
| EXCEPTIONS-CLIENT | ||
| 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.