select * from performance_schema.FILE_INSTANCES limit 1;
FILE_NAME	EVENT_NAME	OPEN_COUNT
#	#	#
select * from performance_schema.FILE_INSTANCES
where file_name='FOO';
FILE_NAME	EVENT_NAME	OPEN_COUNT
insert into performance_schema.FILE_INSTANCES
set file_name='FOO', event_name='BAR', open_count=12;
ERROR 42000: INSERT command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'
update performance_schema.FILE_INSTANCES
set file_name='FOO';
ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'
delete from performance_schema.FILE_INSTANCES
where event_name like "wait/%";
ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'
delete from performance_schema.FILE_INSTANCES;
ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'
LOCK TABLES performance_schema.FILE_INSTANCES READ;
ERROR 42000: SELECT,LOCK TABL command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'
UNLOCK TABLES;
LOCK TABLES performance_schema.FILE_INSTANCES WRITE;
ERROR 42000: SELECT,LOCK TABL command denied to user 'root'@'localhost' for table 'FILE_INSTANCES'
UNLOCK TABLES;