Thread: Trigger calling a function HELP ME! (2)

Sorry. I realize I slipped an error in my code:the code is:--- CREATE TABLE public.imp_test (   id int8,   value text )
WITHOUTOIDS;  CREATE OR REPLACE FUNCTION public.imp_test_to_out_test(imp_test)   RETURNS imp_test AS 'begin  return
$1;end;'  LANGUAGE 'plpgsql' STABLE;  CREATE OR REPLACE FUNCTION public.imp_test_trigger()   RETURNS trigger AS 'begin
returnimp_test_to_out_test(new); end;'   LANGUAGE 'plpgsql' STABLE;  CREATE TRIGGER imp_test_trigger_001   BEFORE
INSERTOR UPDATE   ON public.imp_test   FOR EACH ROW   EXECUTE PROCEDURE public.imp_test_trigger();---regards,
 


=====
Riccardo G. Facchini

On Wednesday 21 April 2004 16:16, abief_ag_-postgresql@yahoo.com wrote:

>   CREATE OR REPLACE FUNCTION public.imp_test_to_out_test(imp_test)
>     RETURNS imp_test AS
>   'begin
>    return $1;
>  end;'
>     LANGUAGE 'plpgsql' STABLE;
>
>   CREATE OR REPLACE FUNCTION public.imp_test_trigger()
>     RETURNS trigger AS
>   'begin
>   return imp_test_to_out_test(new);
>   end;'
>     LANGUAGE 'plpgsql' STABLE;

This is your problem. NEW is a special variable, and I don't think you can 
pass it into another function (other than as NEW.col1, NEW.col2, NEW.col3 
etc).

You can however use TG_NAME or TG_RELNAME to see what trigger/table called 
you. I find that's helpful.
--  Richard Huxton Archonet Ltd

--- Richard Huxton <dev(at)archonet.com> wrote:
> On Wednesday 21 April 2004 16:16, abief_ag_-postgresql(at)yahoo.com
> wrote:
> 
> >   CREATE OR REPLACE FUNCTION public.imp_test_to_out_test(imp_test)
> >     RETURNS imp_test AS
> >   'begin
> >    return $1;
> >  end;'
> >     LANGUAGE 'plpgsql' STABLE;
> >
> >   CREATE OR REPLACE FUNCTION public.imp_test_trigger()
> >     RETURNS trigger AS
> >   'begin
> >   return imp_test_to_out_test(new);
> >   end;'
> >     LANGUAGE 'plpgsql' STABLE;
> 
> This is your problem. NEW is a special variable, and I don't think
> you can 
> pass it into another function (other than as NEW.col1, NEW.col2,
> NEW.col3 
> etc).
> 
> You can however use TG_NAME or TG_RELNAME to see what trigger/table
> called 
> you. I find that's helpful.
> -- 
>   Richard Huxton
>   Archonet Ltd
> 
> ---------------------------(end of
> broadcast)---------------------------
> TIP 6: Have you searched our list archives?
> 
>                http://archives.postgresql.org

So, If I have to do a record-wide manipulation (almost all the fields)
to the NEW record just before returning from the trigger, what other
possibility do you suggest?

thanks for your kind answer...



=====
Riccardo G. Facchini

--- Richard Huxton <dev(AT)archonet.com> wrote:
> On Wednesday 21 April 2004 16:16, abief_ag_-postgresql(AT)yahoo.com
> wrote:
> 
> >   CREATE OR REPLACE FUNCTION public.imp_test_to_out_test(imp_test)
> >     RETURNS imp_test AS
> >   'begin
> >    return $1;
> >  end;'
> >     LANGUAGE 'plpgsql' STABLE;
> >
> >   CREATE OR REPLACE FUNCTION public.imp_test_trigger()
> >     RETURNS trigger AS
> >   'begin
> >   return imp_test_to_out_test(new);
> >   end;'
> >     LANGUAGE 'plpgsql' STABLE;
> 
> This is your problem. NEW is a special variable, and I don't think
> you can 
> pass it into another function (other than as NEW.col1, NEW.col2,
> NEW.col3 
> etc).
> 
> You can however use TG_NAME or TG_RELNAME to see what trigger/table
> called 
> you. I find that's helpful.
> -- 
>   Richard Huxton
>   Archonet Ltd
> 
> ---------------------------(end of
> broadcast)---------------------------
> TIP 6: Have you searched our list archives?
> 
>                http://archives.postgresql.org


One other issue, as I understand it, NEW (and OLD) is a variable of
type record, so you should be able to pass it to a function and get it
as a return value, but it seems that there is a bug reported for
version 7.2.1 that inhibits the use of record as type to be passed to a
function.

any suggestion?

=====
Riccardo G. Facchini