Re: Using UNION inside a cursor

>
> Dear Friends,
>
> I am working on Postgresql 7.3.4 on RH Linux Server 7.3.=20
>
> I have problem in executing the following procedure
>
> CREATE OR REPLACE FUNCTION list_history()
> RETURNS refcursor AS
> 'DECLARE
> ref REFCURSOR;
> BEGIN
> OPEN ref FOR
> (SELECT * FROM history WHERE obs_type =3D \'AA\' )
> UNION=20
> (SELECT * FROM history WHERE obs_type =3D \'TA\');
>
> RETURN ref;
> END;'
> LANGUAGE 'plpgsql' VOLATILE;
>
> While executing this I got the following error
>
> WARNING: plpgsql: ERROR during compile of list_history near line 5
> ERROR: syntax error at "("
>
> While I execute the following code it is working fine and fetches values.
> (SELECT * FROM history WHERE obs_type =3D \'AA\' )
> UNION=20
> (SELECT * FROM history WHERE obs_type =3D \'TA\');
>
> Where I am wrong. Please shed some light,
>
> Regards
> Kumar
>
My suspicion is the plpgsql parser doesn't accept the opening
parenthesis. What happens on

OPEN ref FOR SELECT * FROM (
(SELECT * FROM history WHERE obs_type =3D \'AA\' )
UNION=20
(SELECT * FROM history WHERE obs_type =3D \'TA\')
) ;

Regards, Christoph