系统视图PG_TYPE_NONSTRICT_BASIC_VALUEINDEX_STATISTICperformance schema视图PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_CURRENTPERFORMANCE_SCHEMA.EVENTS_STATEMENTS_HISTORYPERFORMANCE_SCHEMA.EVENTS_STATEMENTS_SUMMARY_BY_DIGESTPERFORMANCE_SCHEMA.EVENTS_WAITS_CURRENTPERFORMANCE_SCHEMA.EVENTS_WAITS_SUMMARY_GLOBAL_BY_EVENT_NAMEPERFORMANCE_SCHEMA.FILE_SUMMARY_BY_INSTANCEPERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMARY_BY_TABLEPERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMARY_BY_INDEX_USAGE