use events_test; select @@event_scheduler; @@event_scheduler DISABLED show events; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start select event_name from information_schema.events; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start show create event intact_check; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start drop event no_such_event; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start create event intact_check_1 on schedule every 5 hour do select 5; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start alter event intact_check_1 on schedule every 8 hour do select 8; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start alter event intact_check_1 rename to intact_check_2; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start drop event intact_check_1; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start drop event intact_check_2; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start drop event intact_check; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start set global event_scheduler=on; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start set global event_scheduler=off; ERROR HY000: Cannot proceed because system tables used by Event Scheduler were found damaged at server start show variables like 'event_scheduler'; Variable_name Value event_scheduler DISABLED Make sure that we still can create and drop databases, and no warnings are produced. drop database if exists mysqltest_database_not_exists; Warnings: Note 1008 Can't drop database 'mysqltest_database_not_exists'; database doesn't exist create database mysqltest_db1; drop database mysqltest_db1; Restore the original mysql.event table drop table mysql.event; rename table event_like to mysql.event; Now let's restart the server again