Karl Czajkowski <karlcz(at)isi(dot)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