Question

I would like to fire an UPDATE trigger only if a certain fields has been modified.
Is it possible to do with a if statement; execute a particular query.

Exemple (Not working as shown):

DROP TRIGGER IF EXISTS `catch_mytable_update`//
CREATE TRIGGER `catch_mytable_update` AFTER UPDATE ON `mytable`
 FOR EACH ROW BEGIN

IF (old.name != new.name) THEN

DELETE FROM trigger WHERE tablename='mytable' AND rowid = new.id;
INSERT INTO trigger (tablename, rowid, cmd, cmduser, time) VALUES('mytable', new.id, 'UPDATE', CURRENT_USER(), NOW());

ENDIF//

END//

Delimiter: //

Answer 1

Try changing:

    IF (name.old != name.new) THEN

to:

    IF old.name != new.name THEN