mariadb/mysql-test/main/mdl.test

--source include/have_metadata_lock_info.inc
--source include/have_innodb.inc

--echo #
--echo # MDEV-12882 - Assertion `mdl_ticket->m_type == MDL_SHARED_UPGRADABLE ||
--echo #                         mdl_ticket->m_type == MDL_SHARED_NO_WRITE ||
--echo #                         mdl_ticket->m_type == MDL_SHARED_NO_READ_WRITE ||
--echo #                         mdl_ticket->m_type == MDL_SHARED_READ'
--echo #                         failed in MDL_context::upgrade_shared_lock
--echo #

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;
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;
UNLOCK TABLES;
LOCK TABLES t1 WRITE CONCURRENT, t3 WRITE;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
UNLOCK TABLES;
LOCK TABLES t3 WRITE, t1 WRITE CONCURRENT;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
UNLOCK TABLES;
LOCK TABLES t1 WRITE, mysql.user WRITE;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
UNLOCK TABLES;
--error ER_CANT_LOCK_LOG_TABLE
LOCK TABLES mysql.general_log WRITE;
# The following may work in embedded server
--error 0,ER_DBACCESS_DENIED_ERROR
LOCK TABLES t1 WRITE,information_schema.tables READ;
UNLOCK TABLES;
DROP TABLE t1,t3;

--echo #
--echo # Check MDL locks taken for different kind of tables by open
--echo #

CREATE TABLE t1(a INT) ENGINE=InnoDB;
CREATE TABLE t3(a INT) ENGINE=myisam;
connect (locker,localhost,root,,);
connection default;

FLUSH TABLES WITH READ LOCK;
connection locker;
--send insert into t1 values (1)
connection default;
# Wait till above update gets blocked on a user lock.
let $wait_condition=
  select count(*) > 0 from information_schema.processlist
  where state = "Waiting for backup lock";
--source include/wait_condition.inc
connection default;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
unlock tables;
connection locker;
--reap
unlock tables;
connection default;

FLUSH TABLES WITH READ LOCK;
connection locker;
--send insert into t3 values (2)
connection default;
# Wait till above update gets blocked on a user lock.
let $wait_condition=
  select count(*) > 0 from information_schema.processlist
  where state = "Waiting for backup lock";
--source include/wait_condition.inc
connection default;
SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
unlock tables;
connection locker;
--reap
unlock tables;
connection default;

disconnect locker;
DROP TABLE t1,t3;