Re: column: on update update? [solved]

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On Mittwoch, 7. Mai 2008 Tom Lane wrote:
> No, the trigger command has to be BEFORE UPDATE not AFTER UPDATE for
> this to work. =A0This is definitely the better way though because the
> row only gets updated once, not stored and then updated again
> (in fact, I think you could get into an infinite loop if an AFTER
> UPDATE trigger tries to update the row again).

OK, here's the final correct syntax (examples missed the () at the=20
function name):

CREATE FUNCTION awlupdate() RETURNS TRIGGER AS '
BEGIN
	NEW.lastupdate =3D now();
	RETURN NEW;
END' LANGUAGE plpgsql;

CREATE TRIGGER awlupdate BEFORE UPDATE ON awl FOR EACH ROW EXECUTE=20
PROCEDURE awlupdate();

Thanks for your help! It's a bit complex just for an update, but it=20
works. :-)

mfg zmi
=2D-=20
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