Mark Borins wrote:
> I am creating a system where I have a trigger on three different tables.
> There is a particular Boolean field in each of these tables that when it is
> set in table it should be set the same in the other two.
Just make sure you only check the boolean value too:
-- Trigger on table a does:
IF NEW.my_bool=OLD.my_bool THEN
RETURN NEW;
END IF;
UPDATE b SET my_bool=NEW.my_bool
WHERE id=NEW.something AND my_bool <> NEW.my_bool
UPDATE c SET my_bool=NEW.my_bool
WHERE id=NEW.something AND my_bool <> NEW.my_bool
-- End code
That way, you always do the minimal amount of work anyway.
--
Richard Huxton
Archonet Ltd
