alter table performance_schema.file_summary_by_instance add column foo integer; ERROR 42000: Access denied for user 'root'@'localhost' to database 'performance_schema' truncate table performance_schema.file_summary_by_instance; ALTER TABLE performance_schema.file_summary_by_instance ADD INDEX test_index(NAME); ERROR 42000: Access denied for user 'root'@'localhost' to database 'performance_schema' CREATE UNIQUE INDEX test_index ON performance_schema.file_summary_by_instance(NAME); ERROR 42000: Access denied for user 'root'@'localhost' to database 'performance_schema'