2992d531b0
This is the follow-up patch for the task MDEV-5816 that fixes assert failure that happened after recompilation of a stored routine containing a cursor on its second execution. The reason of assertion hit is that a state of the SP instruction sp_instr_cpush wasn't reset after its SQL statement re-compiled. To fix the issue the virtual method sp_lex_instr::on_after_expr_parsing is overridden in the derived class sp_instr_cpush. Implementation of this method does resetting of the data member sp_instr_cpush::m_metadata_changed Additionally, implementation of the method sp_instr_set_trigger_field::on_after_expr_parsing has been slightly modified to set the data member sp_instr_set_trigger_field::value just before successful return. This data member is used to check whether this SP instruction is still valid or should be re-compiled. Resetting this data member before an instance of the class Item_trigger_field be successfully allocated theoretically could lead to clearing of instruction's state despite the fact that memory allocation was failed. |
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Code status:
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MariaDB: The open source relational 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/
Help
More help is available from the Maria Discuss mailing list https://launchpad.net/~maria-discuss, MariaDB's Zulip instance, https://mariadb.zulipchat.com/
Live QA for beginner contributors
MariaDB has a dedicated time each week when we answer new contributor questions live on Zulip. From 8:00 to 10:00 UTC on Mondays, and 10:00 to 12:00 UTC on Thursdays, anyone can ask any questions they’d like, and a live developer will be available to assist.
New contributors can ask questions any time, but we will provide immediate feedback during that interval.
Licensing
NOTE:
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 our security-policy.
The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server