88aca3ac24
When a condition containing an always FALSE range part is pushed down into a derived table, an enclosed outer reference can cause a null pointer crash. An example SELECT * FROM (SELECT id FROM t1 GROUP BY id) dt1, (SELECT id FROM t2) dt2, t3 WHERE dt2.id = t3.id AND dt1.id BETWEEN 0 AND (dt2.id IS NULL); is considered as one that can be pushed into the derived table dt1 because the expression (dt2.id IS NULL) is identified as always false. On the on other hand the condition still contains a reference to a column of the table dt2. When pushing the condition to the where clause of the derived table dt1 a copy of it is created and this copy is transformed to be used in the new where clause. When the transformation procedure encounters a reference dt2.id it crashes the server as only the references to the columns used in the group by list of the specification of dt1 or those equal to them are expected in the condition that can be pushed into the where clause of the derived table. Based on patch by Igor Babaev. |
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| client | ||
| cmake | ||
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| debian | ||
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| extra | ||
| include | ||
| libmariadb@55abb32038 | ||
| libmysqld | ||
| libservices | ||
| man | ||
| mysql-test | ||
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| sql-common | ||
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| configure.cmake | ||
| CONTRIBUTING.md | ||
| COPYING | ||
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| KNOWN_BUGS.txt | ||
| README.md | ||
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Code status:
ci.appveyor.com
MariaDB: The innovative open source database
MariaDB was designed as a drop-in replacement of MySQL(R) with more features, new storage engines, fewer bugs, and better performance.
MariaDB is brought to you by the MariaDB Foundation and the MariaDB Corporation. Please read the CREDITS file for details about the MariaDB Foundation, and who is developing MariaDB.
MariaDB is developed by many of the original developers of MySQL who now work for the MariaDB Corporation, the MariaDB Foundation and by many people in the community.
MySQL, which is the base of MariaDB, is a product and trademark of Oracle Corporation, Inc. For a list of developers and other contributors, see the Credits appendix. You can also run 'SHOW authors' to get a list of active contributors.
A description of the MariaDB project and a manual can be found at:
https://mariadb.com/kb/en/mariadb-vs-mysql-features/
https://mariadb.com/kb/en/mariadb-versus-mysql-compatibility/
https://mariadb.com/kb/en/new-and-old-releases/
Getting the code, building it and testing it
Refer to the following guide: https://mariadb.org/get-involved/getting-started-for-developers/get-code-build-test/ which outlines how to build the source code correctly and run the MariaDB testing framework, as well as which branch to target for your contributions.
Help
More help is available from the Maria Discuss mailing list https://lists.mariadb.org/postorius/lists/discuss.lists.mariadb.org/ and MariaDB's Zulip instance, https://mariadb.zulipchat.com/
Licensing
MariaDB is specifically available only under version 2 of the GNU General Public License (GPLv2). (I.e. Without the "any later version" clause.) This is inherited from MySQL. Please see the README file in the MySQL distribution for more information.
License information can be found in the COPYING file. Third party license information can be found in the THIRDPARTY file.
Bug Reports
Bug and/or error reports regarding MariaDB should be submitted at: https://jira.mariadb.org
For reporting security vulnerabilities see: https://mariadb.org/about/security-policy/
The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server