#
# 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