Re: BUG #6067: In PL/pgsql, EXISTS(SELECT ... INTO...) fails

Tom Lane wrote:
> "David Fetter" <dfetter@vmware.com> writes:
> >     IF EXISTS (SELECT 1 INTO STRICT i) THEN
> >         RAISE NOTICE '%', a;
> >     END IF;
>
> Umm ... are you just complaining that the error message isn't very
> helpful, or are you actually expecting that to do something useful?
> If the latter, what exactly?  I'm particularly confused by your use
> of the STRICT option here, because if we did support that, I would
> expect the STRICT to throw an error if there were not exactly one
> matching row, making the EXISTS test 100% pointless.
>
> But the short answer is that we don't support INTO in sub-selects,
> and in general I doubt that we ever will, since in most cases the
> behavior wouldn't be very well-defined.  It might be worth a TODO
> to provide a better error message than "syntax error", though.

Is it worth documenting, fixing, or adding this to the TODO list?

--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + It's impossible for everything to be true. +