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update performance_schema.setup_timers
set timer_name='CYCLE' where name="wait";
update performance_schema.setup_timers
set timer_name='NANOSECOND' where name="stage";
update performance_schema.setup_timers
set timer_name='NANOSECOND' where name="statement";
update performance_schema.setup_timers
set timer_name='MICROSECOND' where name="idle";
select * from performance_schema.setup_timers;
NAME TIMER_NAME
idle MICROSECOND
wait CYCLE
stage NANOSECOND
statement NANOSECOND
select * from performance_schema.setup_timers
where name='Wait';
NAME TIMER_NAME
wait CYCLE
select * from performance_schema.setup_timers
where timer_name='CYCLE';
NAME TIMER_NAME
wait CYCLE
insert into performance_schema.setup_timers
set name='FOO', timer_name='CYCLE';
ERROR 42000: INSERT command denied to user 'root'@'localhost' for table 'setup_timers'
update performance_schema.setup_timers
set name='FOO';
ERROR HY000: Invalid performance_schema usage
update performance_schema.setup_timers
set timer_name='MILLISECOND';
select * from performance_schema.setup_timers;
NAME TIMER_NAME
idle MILLISECOND
wait MILLISECOND
stage MILLISECOND
statement MILLISECOND
update performance_schema.setup_timers
set timer_name='CYCLE';
delete from performance_schema.setup_timers;
ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'setup_timers'
delete from performance_schema.setup_timers
where name='Wait';
ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'setup_timers'
LOCK TABLES performance_schema.setup_timers READ;
UNLOCK TABLES;
LOCK TABLES performance_schema.setup_timers WRITE;
UNLOCK TABLES;
update performance_schema.setup_timers
set timer_name='CYCLE' where name="wait";
update performance_schema.setup_timers
set timer_name='NANOSECOND' where name="stage";
update performance_schema.setup_timers
set timer_name='NANOSECOND' where name="statement";
update performance_schema.setup_timers
set timer_name='MICROSECOND' where name="idle";
select * from performance_schema.setup_timers;
NAME TIMER_NAME
idle MICROSECOND
wait CYCLE
stage NANOSECOND
statement NANOSECOND
#
# MDEV-25325 column_comment for performance_schema tables
#
select column_name, column_comment
from information_schema.columns
where table_schema='performance_schema' and table_name='setup_timers';
column_name column_comment
NAME Type of instrument the timer is used for.
TIMER_NAME Timer applying to the instrument type. Can be modified.
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