Re: How to call SETOF function?

On Wednesday 06 January 2010 5:01:39 pm Iain Barnett wrote:
> If I run the following (in either a terminal or the PgAdmin3 Query tool) I
> get the error:
>
> ERROR: query has no destination for result data
> SQL state: 42601
> Hint: If you want to discard the results of a SELECT, use PERFORM instead.
> Context: PL/pgSQL function "anything_all_udf" line 3 at SQL statement
>
> How am I'm supposed to call the function so that I get the same result as
> the adhoc query it surrounds?
>
> ----
>
> create table anything (
> first serial primary key not null
> , second varchar not null
> , third timestamp default now() not null
> );
>
> insert into anything ( second ) values ( 'row a' );
> insert into anything ( second ) values ( 'row b' );
> insert into anything ( second ) values ( 'row c' );
>
> CREATE OR REPLACE FUNCTION anything_all_udf(
> ) RETURNS setof anything
> AS $$
> BEGIN
> select * from anything;
> END;
> $$
> LANGUAGE plpgsql;

Try (Note change of language):
CREATE OR REPLACE FUNCTION anything_all_udf(
) RETURNS setof anything
AS $$
select * from anything;
$$
LANGUAGE sql;

See here for how to do it using plpgsql:
http://www.postgresql.org/docs/8.4/interactive/plpgsql-control-structures.html#PLPGSQL-STATEMENTS-RETURNING

>
> select * from anything_all_udf( );
>
>
> Regards,
> Iain

--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com