Modifies one or more characteristics of an existing event.

Syntax

ALTER
    [DEFINER = { user | CURRENT_USER }]
    EVENT event_name
    [ON SCHEDULE schedule]
    [ON COMPLETION [NOT] PRESERVE]
    [RENAME TO new_event_name]
    [ENABLE | DISABLE | DISABLE ON SLAVE]
    [COMMENT 'comment']
    [DO sql_statement]

Description

The ALTER EVENT statement is used to change one or more of the characteristics of an existing event without the need to drop and recreate it. The syntax for each of the DEFINER, ON SCHEDULE, ON COMPLETION, COMMENT, ENABLE / DISABLE, and DO clauses is exactly the same as when used with CREATE EVENT.

This statement requires the EVENT privilege. When a user executes a successful ALTER EVENT statement, that user becomes the definer for the affected event.

(In MySQL 5.1.11 and earlier, an event could be altered only by its definer, or by a user having the SUPER privilege.)

ALTER EVENT works only with an existing event:

ALTER EVENT no_such_event ON SCHEDULE EVERY '2:3' DAY_HOUR;
ERROR 1539 (HY000): Unknown event 'no_such_event'

Examples

ALTER EVENT myevent 
  ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 2 HOUR 
  DO 
    UPDATE myschema.mytable SET mycol = mycol + 1;

See Also

• Events Overview
• CREATE EVENT
• SHOW CREATE EVENT
• DROP EVENT