blob: 1a7291d922b57dce967f587b0acd79b956482325 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
#
# MDEV-12882 - Assertion `mdl_ticket->m_type == MDL_SHARED_UPGRADABLE ||
# mdl_ticket->m_type == MDL_SHARED_NO_WRITE ||
# mdl_ticket->m_type == MDL_SHARED_NO_READ_WRITE ||
# mdl_ticket->m_type == MDL_SHARED_READ'
# failed in MDL_context::upgrade_shared_lock
#
CREATE TABLE t1(a INT) ENGINE=InnoDB;
LOCK TABLES t1 WRITE CONCURRENT, t1 AS t2 READ;
SELECT * FROM information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
9 MDL_INTENTION_EXCLUSIVE NULL Global read lock
9 MDL_SHARED_NO_READ_WRITE NULL Table metadata lock test t1
UNLOCK TABLES;
LOCK TABLES t1 AS t2 READ, t1 WRITE CONCURRENT;
SELECT * FROM information_schema.metadata_lock_info;
THREAD_ID LOCK_MODE LOCK_DURATION LOCK_TYPE TABLE_SCHEMA TABLE_NAME
9 MDL_INTENTION_EXCLUSIVE NULL Global read lock
9 MDL_SHARED_WRITE NULL Table metadata lock test t1
9 MDL_SHARED_READ_ONLY NULL Table metadata lock test t1
UNLOCK TABLES;
DROP TABLE t1;
|
