Hi Tom, I need the parentheses, because the where condition is different for the 1 and 2 nd query . Moreover my actual use includes a 'Limit' clause also. so the parentheses is needed.
I have tried with execute but it showed error. But I have managed to fix the problem like this. OPEN ref FOR SELECT * FROM (SELECT * FROM history WHERE obs_type =3D \'AA\' ) UNION (SELECT * FROM history WHERE obs_type =3D \'TA\') as foo; Regards Kumar ----- Original Message ----- From: "Tom Lane" <[EMAIL PROTECTED]> To: "Christoph Haller" <[EMAIL PROTECTED]> Cc: ""Kumar"" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Thursday, October 30, 2003 8:50 PM Subject: Re: [SQL] Using UNION inside a cursor > Christoph Haller <[EMAIL PROTECTED]> writes: > >> OPEN ref FOR > >> (SELECT * FROM history WHERE obs_type =3D \'AA\' ) > >> UNION > >> (SELECT * FROM history WHERE obs_type =3D \'TA\'); > > > My suspicion is the plpgsql parser doesn't accept the opening > > parenthesis. > > Yeah. Looking at the plpgsql grammar, it expects the token after FOR to > be either SELECT or EXECUTE. This example demonstrates that that code > is wrong, so I'll fix it for 7.4. But in the meantime, why don't you > just leave out the parentheses? > > regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 8: explain analyze is your friend
