select * from performance_schema.THREADS
where name like 'Thread/%' limit 1;
THREAD_ID	ID	NAME
#	#	#
select * from performance_schema.THREADS
where name='FOO';
THREAD_ID	ID	NAME
insert into performance_schema.THREADS
set name='FOO', thread_id=1, id=2;
ERROR 42000: INSERT command denied to user 'root'@'localhost' for table 'THREADS'
update performance_schema.THREADS
set thread_id=12;
ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'THREADS'
update performance_schema.THREADS
set thread_id=12 where name like "FOO";
ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'THREADS'
delete from performance_schema.THREADS
where id=1;
ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'THREADS'
delete from performance_schema.THREADS;
ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'THREADS'
LOCK TABLES performance_schema.THREADS READ;
ERROR 42000: SELECT,LOCK TABL command denied to user 'root'@'localhost' for table 'THREADS'
UNLOCK TABLES;
LOCK TABLES performance_schema.THREADS WRITE;
ERROR 42000: SELECT,LOCK TABL command denied to user 'root'@'localhost' for table 'THREADS'
UNLOCK TABLES;