Re: PL/pgSQL PERFORM with CTE

2013/8/20 David E. Wheeler <david(at)justatheory(dot)com>

> Hi Pavel,
>
> On Aug 20, 2013, at 2:11 PM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
> wrote:
>
> >> david=# DO $$
> >> david$# BEGIN
> >> david$# WITH now AS (SELECT now())
> >> david$# PERFORM * from now;
> >> david$# END;
> >> david$# $$;
> >> ERROR: syntax error at or near "PERFORM"
> >> LINE 4: PERFORM * from now;
> >> ^
> >> Parser bug in PL/pgSQL, perhaps?
> >
> > no
> >
> > you cannot use a PL/pgSQL statement inside SQL statement.
>
> Well, there ought to be *some* way to tell PL/pgSQL to discard the result.
> Right now I am adding a variable to select into but never otherwise use.
> Inelegant, IMHO. Perhaps I’m missing some other way to do it?
>
> If so, it would help if the hint suggesting the use of PERFORM pointed to
> such alternatives.
>

postgres=# DO $$
BEGIN
PERFORM * FROM (WITH now AS (SELECT now())
SELECT * from now) x;
END;
$$;
DO
postgres=#

Regards

Pavel

>
> Best,
>
> David
>
>