From: Aspire Something <sank89@sancharnet.in>
To: Christoph Haller <ch@rodos.fzk.de>
To: pgsql-sql@postgresql.org
Cc: Andreas.Pflug@web.de
Subject: Re: How to notice column changes in trigger
Date: Tue, 11 Mar 2003 09:45:32 +0530
Message-ID: <002001c2e78b$642e6df0$c9c832c0@societykotla> (raw)
References: <3E6CA287.2EE21BFB@rodos.fzk.de>
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
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>
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To: pgsql-sql@postgresql.org
Cc: sank89@sancharnet.in, ch@rodos.fzk.de, Andreas.Pflug@web.de
Subject: Re: How to notice column changes in trigger
In-Reply-To: <002001c2e78b$642e6df0$c9c832c0@societykotla>
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