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MDEV-20945: BACKUP UNLOCK + FTWRL assertion failure

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MDEV-20945: BACKUP UNLOCK + FTWRL assertion failure | SIGSEGV in I_P_List
from MDL_context::release_lock on INSERT w/ BACKUP LOCK (on optimized
builds) | Assertion `ticket->m_duration == MDL_EXPLICIT' failed

BACKUP LOCK behavior is modified so it won't be used wrong:
- BACKUP LOCK should commit any active transactions.
- BACKUP LOCK should not be allowed in stored procedures.
- When BACKUP LOCK is active, don't allow any DDL's for that connection.
- FTWRL is forbidden on the same connection while BACKUP LOCK is active.

Reviewed-by: monty@mariadb.com
This commit is contained in:
Rinat Ibragimov
2020-10-21 23:34:36 +03:00
committed by Monty
parent ac8d205795
commit 709ba7dcae
10 changed files with 277 additions and 4 deletions
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10
mysql-test/main/implicit_commit.result
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@ -1035,6 +1035,16 @@ YES
# SQLCOM_BACKUP
#
#
# SQLCOM_BACKUP_LOCK
#
INSERT INTO db1.trans VALUES (1);
BACKUP LOCK t1;
ROLLBACK;
BACKUP UNLOCK;
CALL db1.test_if_commit();
IMPLICIT COMMIT
YES
#
# SQLCOM_SHOW_ARCHIVE
#
#