Event Error Handling

Event Errors

Errors inside events are silently logged to the MySQL error log. Use DECLARE HANDLER inside BEGIN...END to handle exceptions gracefully.

Example

DELIMITER //
CREATE EVENT safe_cleanup
ON SCHEDULE EVERY 1 HOUR
DO
BEGIN
  DECLARE EXIT HANDLER FOR SQLEXCEPTION
  BEGIN
    INSERT INTO event_errors (event_name, error_time) VALUES ("safe_cleanup", NOW());
  END;
  DELETE FROM sessions WHERE expires_at < NOW();
  UPDATE stats SET last_cleanup = NOW() WHERE stat_key = "session_cleanup";
END//
DELIMITER ;

SQL

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Pro Tip

Without an error handler, a failed event is silently skipped — always log errors to an audit table.

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