Hello Christoph Haller ,
> >
> > >So you want the trigger executed only if assignments to b and/or c do
Do sime thing like this use if /then /esle s block for the problem
In the first if blick check that b and c is null by the declaration of
IS NULL after that you run the update command as required
The program code will show as
create function
CREATE FUNCTION BLAH_FUNCTION() RETURNS "trigger" AS '
usual blah blah of declre and all ,
IF NEW.b IS NULL and NEW.C IS NULL THEN
ROCK BABY
ELSE
Do OTHERWISE
END IF;
more blah blah plpgsql';
CREATE TRIGGER BLAH BEFORE UPDATE ON BLAH_TABLE FOR EACH ROW EXECUTE PROCEDURE BLAH_FUNCTION
Please revert back if this helps .
Regards
V Kashyap
> > >not appear within the update command. Right?
> > >
> >
> > Right, that's what I want.
> >
> I'm afraid I have no idea how to accomplish that.
>
> Regards, Christoph
>
>
>
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