mariadb/mysql-test/suite/perfschema/t/dml_metadata_locks.test

# Tests for PERFORMANCE_SCHEMA

--source include/not_embedded.inc
--source include/have_perfschema.inc

--disable_result_log
select * from performance_schema.metadata_locks;
--enable_result_log

select * from performance_schema.metadata_locks
  where object_name='foo';

--error ER_TABLEACCESS_DENIED_ERROR
insert into performance_schema.metadata_locks
  set object_name='FOO', owner_thread_id=1;

--error ER_TABLEACCESS_DENIED_ERROR
update performance_schema.metadata_locks
  set owner_thread_id=12 where object_name='foo';

--error ER_TABLEACCESS_DENIED_ERROR
delete from performance_schema.metadata_locks;

--error ER_TABLEACCESS_DENIED_ERROR
delete from performance_schema.metadata_locks
  where timer_name='CYCLE';

-- error ER_TABLEACCESS_DENIED_ERROR
LOCK TABLES performance_schema.metadata_locks READ;
UNLOCK TABLES;

-- error ER_TABLEACCESS_DENIED_ERROR
LOCK TABLES performance_schema.metadata_locks WRITE;
UNLOCK TABLES;

--echo #
--echo # MDEV-25325 column_comment for performance_schema tables
--echo #
select column_name, column_comment 
from information_schema.columns 
where table_schema='performance_schema' and table_name='metadata_locks';