> 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 result via 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.
it is little bit different issue - PL/pgSQL doesn't check if returned type is VOID - it can be allowed, I am thinking. So check of empty result can be enhanced.
From:
Stephen Frost Date: Subject:
Re: ALTER SYSTEM SET command to change postgresql.conf parameters
(RE: Proposal for Allow postgresql.conf values to be changed via
SQL [review])
