database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

MDEV-22001: Server crashes in st_select_lex_unit::exclude_level upon execution of SP

Browse Source 
Running some statements that use IN subqueries outside context of a regular
query could result in server abnormal termination.

The reason for failure is that internal structures SELECT_LEX/SELECT_LEX_UNIT
created on behalf of parsed query were initialized incorrectly. Incorrect
initialization of the structures SELECT_LEX/SELECT_LEX_UNIT was introduced
by the commit de745ecf29
(MDEV-11953: support of brackets in UNION/EXCEPT/INTERSECT operations)
pushed into 10.4, that is the reason this bug report is not reproduced in 10.3.

To fix the issue the method SLECTE_LEX::register_unit is used for proper
initialization of the data structures SELECT_LEX/SELECT_LEX_UNIT. Additionally,
the method SELECT_LEX::get_slave() was removed from the source code base
since for those use cases where it is used it can be replaced by the method
first_inner_unit().
This commit is contained in:
Dmitry Shulga
2022-07-12 17:18:48 +07:00
parent 9a0cbd31ce
commit f439cfdf93
4 changed files with 32 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
mysql-test/main/sp-bugs.result
View File

@ -353,3 +353,13 @@ drop table _t1;
#
# End of 10.3 tests
#
#
# MDEV-22001: Server crashes in st_select_lex_unit::exclude_level upon execution of SP
#
BEGIN NOT ATOMIC DECLARE a INT DEFAULT 0 IN ( SELECT 1 ) OR 2 ; END $
BEGIN NOT ATOMIC DECLARE a INT DEFAULT 0 IN ( SELECT 1 ) OR (SELECT 2) ; END $
KILL (('x' IN ( SELECT 1)) MOD 44);
ERROR HY000: Unknown thread id: 0
#
# End of 10.4 tests
#