# Tests for PERFORMANCE_SCHEMA

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

--disable_result_log
select * from performance_schema.mutex_instances limit 1;

select * from performance_schema.mutex_instances
  where name='FOO';
--enable_result_log

--error ER_TABLEACCESS_DENIED_ERROR
insert into performance_schema.mutex_instances
  set name='FOO', object_instance_begin=12;

--error ER_TABLEACCESS_DENIED_ERROR
update performance_schema.mutex_instances
  set name='FOO';

--error ER_TABLEACCESS_DENIED_ERROR
delete from performance_schema.mutex_instances
  where name like "wait/%";

--error ER_TABLEACCESS_DENIED_ERROR
delete from performance_schema.mutex_instances;

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

-- error ER_TABLEACCESS_DENIED_ERROR
LOCK TABLES performance_schema.mutex_instances 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='mutex_instances';