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# 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';
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