#
# 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;
CREATE TABLE t3(a INT) ENGINE=myisam;
LOCK TABLES t1 WRITE CONCURRENT, t1 AS t2 READ;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
MDL_BACKUP_TRANS_DML	Backup lock		
MDL_SHARED_NO_READ_WRITE	Table metadata lock	test	t1
UNLOCK TABLES;
LOCK TABLES t1 AS t2 READ, t1 WRITE CONCURRENT;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
MDL_BACKUP_TRANS_DML	Backup lock		
MDL_SHARED_WRITE	Table metadata lock	test	t1
MDL_SHARED_READ_ONLY	Table metadata lock	test	t1
UNLOCK TABLES;
LOCK TABLES t1 WRITE CONCURRENT, t3 WRITE;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
MDL_BACKUP_DDL	Backup lock		
MDL_BACKUP_DML	Backup lock		
MDL_SHARED_WRITE	Table metadata lock	test	t1
MDL_SHARED_NO_READ_WRITE	Table metadata lock	test	t3
MDL_INTENTION_EXCLUSIVE	Schema metadata lock	test	
UNLOCK TABLES;
LOCK TABLES t3 WRITE, t1 WRITE CONCURRENT;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
MDL_BACKUP_DDL	Backup lock		
MDL_BACKUP_DML	Backup lock		
MDL_SHARED_WRITE	Table metadata lock	test	t1
MDL_SHARED_NO_READ_WRITE	Table metadata lock	test	t3
MDL_INTENTION_EXCLUSIVE	Schema metadata lock	test	
UNLOCK TABLES;
LOCK TABLES t1 WRITE, mysql.user WRITE;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
MDL_BACKUP_DDL	Backup lock		
MDL_SHARED_NO_READ_WRITE	Table metadata lock	mysql	user
MDL_SHARED_NO_READ_WRITE	Table metadata lock	test	t1
MDL_INTENTION_EXCLUSIVE	Schema metadata lock	mysql	
MDL_SHARED_NO_READ_WRITE	Table metadata lock	mysql	global_priv
MDL_INTENTION_EXCLUSIVE	Schema metadata lock	test	
UNLOCK TABLES;
LOCK TABLES mysql.general_log WRITE;
ERROR HY000: You can't use locks with log tables
LOCK TABLES t1 WRITE,information_schema.tables READ;
UNLOCK TABLES;
DROP TABLE t1,t3;
#
# Check MDL locks taken for different kind of tables by open
#
CREATE TABLE t1(a INT) ENGINE=InnoDB;
CREATE TABLE t3(a INT) ENGINE=myisam;
connect purge_control,localhost,root,,;
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connect  locker,localhost,root,,;
connection default;
FLUSH TABLES WITH READ LOCK;
connection locker;
insert into t1 values (1);
connection default;
connection default;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
MDL_BACKUP_FTWRL2	Backup lock		
MDL_SHARED_WRITE	Table metadata lock	test	t1
unlock tables;
connection locker;
unlock tables;
connection default;
FLUSH TABLES WITH READ LOCK;
connection locker;
insert into t3 values (2);
connection default;
connection default;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info
WHERE TABLE_NAME NOT LIKE 'innodb_%_stats';
LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
MDL_BACKUP_FTWRL2	Backup lock		
MDL_SHARED_WRITE	Table metadata lock	test	t3
unlock tables;
connection locker;
unlock tables;
disconnect purge_control;
connection default;
disconnect locker;
DROP TABLE t1,t3;