1alter table performance_schema.table_lock_waits_summary_by_table 2add column foo integer; 3ERROR 42000: Access denied for user 'root'@'localhost' to database 'performance_schema' 4truncate table performance_schema.table_lock_waits_summary_by_table; 5ALTER TABLE performance_schema.table_lock_waits_summary_by_table ADD INDEX test_index(TABLE_NAME); 6ERROR 42000: Access denied for user 'root'@'localhost' to database 'performance_schema' 7CREATE UNIQUE INDEX test_index ON performance_schema.table_lock_waits_summary_by_table(TABLE_NAME); 8ERROR 42000: Access denied for user 'root'@'localhost' to database 'performance_schema' 9