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# Tests for PERFORMANCE_SCHEMA
--source include/not_embedded.inc
--source include/have_perfschema.inc
--source include/have_timer_cycle.inc
--replace_column 2 <frequency> 3 <resolution> 4 <overhead>
select * from performance_schema.performance_timers;
--replace_column 2 <frequency> 3 <resolution> 4 <overhead>
select * from performance_schema.performance_timers
where timer_name='CYCLE';
--error ER_TABLEACCESS_DENIED_ERROR
insert into performance_schema.performance_timers
set timer_name='FOO', timer_frequency=1,
timer_resolution=2, timer_overhead=3;
--error ER_TABLEACCESS_DENIED_ERROR
update performance_schema.performance_timers
set timer_frequency=12 where timer_name='CYCLE';
--error ER_TABLEACCESS_DENIED_ERROR
delete from performance_schema.performance_timers;
--error ER_TABLEACCESS_DENIED_ERROR
delete from performance_schema.performance_timers
where timer_name='CYCLE';
-- error ER_TABLEACCESS_DENIED_ERROR
LOCK TABLES performance_schema.performance_timers READ;
UNLOCK TABLES;
-- error ER_TABLEACCESS_DENIED_ERROR
LOCK TABLES performance_schema.performance_timers 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='performance_timers';
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