Thread: how to call a stored function from another stored function? even possible?

On Oct 11, 2011, at 15:54, Java Services <jvsrvcs@gmail.com> wrote:

> I have a stored functionA that returns void
>
> Inside there I have a line that says:
>    select functionB();
>
> and it gives this error.
>
> ERROR:  query has no destination for result data
> HINT:  If you want to discard the results of a SELECT, use PERFORM instead.
> CONTEXT:  PL/pgSQL function "functionA" line 13 at SQL statement
>
> ********** Error **********
>
>
> any ideas?

If you want to discard the results of a SELECT, use PERFORM instead.

See 39.5.2

David J.

On 11/10/2011 20:54, Java Services wrote:
> I have a stored functionA that returns void
>
> Inside there I have a line that says:
>    select functionB();
>
> and it gives this error.
>
> ERROR:  query has no destination for result data
> HINT:  If you want to discard the results of a SELECT, use PERFORM instead.
> CONTEXT:  PL/pgSQL function "functionA" line 13 at SQL statement

As the message says, in pl/pgsql you need to specify a destination for
the returned data:

create or replace function....
as
$$
declare
  my_value ....
begin
  select function_b() into my_value;
  (etc)

If you don't need the return value of function_b(), or if it returns
void, then use PERFORM instead:

  perform function_b();

Gory details here:

  www.postgresql.org/docs/9.1/static/plpgsql-statements.html

HTH

Ray.


--
Raymond O'Donnell :: Galway :: Ireland
rod@iol.ie