-
Notifications
You must be signed in to change notification settings - Fork 1.7k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
MDEV-31181 Crash with EXPLAIN EXTENDED for single-table DELETE using …
…IN predicand This bug affected EXPLAIN EXTENDED command for single-table DELETE that used an IN subquery in its WHERE clause. A crash happened if the optimizer chose to employ index_subquery or unique_subquery access when processing such command. The crash happened when the command tried to print the transformed query. In the current code of 10.4 for single-table DELETE statements the output of any explain command is produced after the join structures of all used subqueries have been destroyed. JOIN::destroy() sets the field tab of the JOIN_TAB structures created for subquery tables to NULL. As a result subselect_indexsubquery_engine::print(), subselect_indexsubquery_engine() cannot use this field to get the alias name of the joined table. This patch suggests to use the field TABLE_LIST::TAB that can be accessed from JOIN_TAB::tab_list to get the alias name of the joined table. Approved by Oleksandr Byelkin <sanja@mariadb.com>
- Loading branch information
1 parent
84b9fc2
commit a09f661
Showing
4 changed files
with
72 additions
and
7 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters