On Aug 20, 2013, at 2:41 PM, Pavel Stehule <pavel.stehule@gmail.com> wrote:
> yes, in this context you should not use a PERFORM
>
> PL/pgSQL protect you before useless queries - so you can use a CTE without returned result directly or CTE with
resultvia PERFORM statement (and in this case it must be unmodifing CTE).
>
> Sorry, I don't see any problem - why you return some from CTE and then you throw this result?
I am passing the values returned from a CTE to a call to pg_notify(). I do not care to collect the output of
pg_notify(),which returns VOID.
Best,
David