Quelle  dml_ews_by_instance.test  Sprache: unbekannt

# Tests for PERFORMANCE_SCHEMA

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

--disable_result_log
select * from performance_schema.events_waits_summary_by_instance
  where event_name like 'Wait/Synch/%' limit 1;

select * from performance_schema.events_waits_summary_by_instance
  where event_name='FOO';

select * from performance_schema.events_waits_summary_by_instance
  order by count_star limit 1;

select * from performance_schema.events_waits_summary_by_instance
  order by count_star desc limit 1;

select * from performance_schema.events_waits_summary_by_instance
  where min_timer_wait > 0 order by count_star limit 1;

select * from performance_schema.events_waits_summary_by_instance
  where min_timer_wait > 0 order by count_star desc limit 1;
--enable_result_log

--error ER_TABLEACCESS_DENIED_ERROR
insert into performance_schema.events_waits_summary_by_instance
  set event_name='FOO', object_instance_begin=0,
  count_star=1, sum_timer_wait=2, min_timer_wait=3,
  avg_timer_wait=4, max_timer_wait=5;

--error ER_TABLEACCESS_DENIED_ERROR
update performance_schema.events_waits_summary_by_instance
  set count_star=12;

--error ER_TABLEACCESS_DENIED_ERROR
update performance_schema.events_waits_summary_by_instance
  set count_star=12 where event_name like "FOO";

--error ER_TABLEACCESS_DENIED_ERROR
delete from performance_schema.events_waits_summary_by_instance
  where count_star=1;

--error ER_TABLEACCESS_DENIED_ERROR
delete from performance_schema.events_waits_summary_by_instance;

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

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