select * from performance_schema.threads where name like 'Thread/%' limit 1; select * from performance_schema.threads where name='FOO'; insert into performance_schema.threads set name='FOO', thread_id=1, processlist_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 TABLES command denied to user 'root'@'localhost' for table 'threads' UNLOCK TABLES; LOCK TABLES performance_schema.threads WRITE; ERROR 42000: SELECT,LOCK TABLES command denied to user 'root'@'localhost' for table 'threads' UNLOCK TABLES;