Re: [PERFORM] optimizing immutable vs. stable function calls?

Karl Czajkowski <karlcz@isi.edu> writes:
> Is there a correctness hazard with pretending our function is
> IMMUTABLE, even though we will change the underlying config parameter
> in the same connection?

You could probably get away with that if you never ever use prepared
queries (beware that almost anything in plpgsql is a prepared query).
It's a trick that's likely to bite you eventually though.

            regards, tom lane