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Added support for BACKUP LOCK / BACKUP UNLOCK

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This commit is contained in:
Michael Widenius
2019-01-14 15:46:49 +02:00
parent 3975e22d55
commit aad0165cea
11 changed files with 186 additions and 10 deletions
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46
mysql-test/main/backup_locks.result Normal file
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#
# Test lock taken
#
BACKUP LOCK test.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_SHARED_HIGH_PRIO Table metadata lock test t1
BACKUP UNLOCK;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
BACKUP LOCK t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_SHARED_HIGH_PRIO Table metadata lock test t1
BACKUP UNLOCK;
BACKUP LOCK non_existing.t1;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_SHARED_HIGH_PRIO Table metadata lock non_existing t1
BACKUP UNLOCK;
#
# Test that backup lock protects against ddl
#
connect con1,localhost,root,,;
connection default;
create table t1 (a int) engine=innodb;
insert into t1 values (1);
backup lock t1;
select * from t1;
a
1
connection con1;
drop table t1;
connection default;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
LOCK_MODE LOCK_TYPE TABLE_SCHEMA TABLE_NAME
MDL_SHARED_HIGH_PRIO Table metadata lock test t1
MDL_INTENTION_EXCLUSIVE Schema metadata lock test
select * from t1;
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
backup unlock;
connection con1;
connection default;
disconnect con1;
show tables;
Tables_in_test