Re: Trigger from a function

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От dguevara
Тема Re: Trigger from a function
Дата
Msg-id 20080221234117.M29958@acceso.com.pe
обсуждение исходный текст
Ответ на Re: Trigger from a function  (Decibel! <decibel@decibel.org>)
Список pgsql-admin
Thanks for your response, i made a mistake, the last function is like this:

CREATE OR REPLACE FUNCTION Z
   RETURNS "trigger" AS
 $BODY$
 begin
      if (tg_op in ('INSERT', 'UPDATE', 'DELETE')) then
         update B;
      end if;
 $BODY$
  LANGUAGE 'plpgsql' VOLATILE;


And the reason why i made a fake example is because it basically is that, a simple function with a
simple update. I'd just like to know why if  i do that update through a query it invokes the trigger
and not when i do it inside the function.


Danilo Guevara
Departamento de Sistemas
Acceso Crediticio SAC

---------- Original Message -----------
From: Decibel! <decibel@decibel.org>
To: dguevara <dguevara@acceso.com.pe>
Cc: pgsql-admin@postgresql.org
Sent: Thu, 21 Feb 2008 17:31:44 -0600
Subject: Re: [ADMIN] Trigger from a function

> On Feb 18, 2008, at 10:29 AM, dguevara wrote:
>
> > Hello all,
> >
> > I have a problem with a trigger which is executed when i make an
> > UPDATE trought a simple query, but
> > not when the UPDATE is made in a store procedure.
> >
> > Maybe i'm missing something in the declaration of the function and
> > i would appreciate any help.
> > T
> > his is the function:
> >
> > CREATE OR REPLACE FUNCTION X
> >   RETURNS SETOF void AS
> > $BODY$
> >
> > begin
> >   update A;
> > end;
> > $BODY$
> >   LANGUAGE 'plpgsql' VOLATILE;
> >
> >
> > The trigger:
> >
> > CREATE TRIGGER Y
> >   BEFORE INSERT OR UPDATE
> >   ON A
> >   FOR EACH ROW
> >   EXECUTE PROCEDURE Z;
> >
> > CREATE OR REPLACE FUNCTION Z
> >   RETURNS "trigger" AS
> > $BODY$
> > begin
> >      if (tg_op in ('INSERT', 'UPDATE', 'DELETE')) then
> >         update A;
> >      end if;
> > $BODY$
> >   LANGUAGE 'plpgsql' VOLATILE;
>
> Can't help much with your fake example, but I am wondering why you
> have a recursive trigger on A.
> --
> Decibel!, aka Jim C. Nasby, Database Architect  decibel@decibel.org
> Give your computer some brain candy! www.distributed.net Team #1828
------- End of Original Message -------


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