MIME-Version: 1.0
References: <17502-281a7aaacfaa872a@postgresql.org>
 <CABUevEz7t3OWxaSSVSHOxa5KcYioOk=yRwoL3iMViyZQ8m2wAw@mail.gmail.com>
 <CAGckUK2GLF=d9J5ErEWgK5x8ECqCw4equnq3jEzrqtfJw+iHYw@mail.gmail.com>
 <CAApHDvoR4BXm7oxSrYhpEAFOZ-qMPkkYnn14y6sxtPf=5w5OOw@mail.gmail.com>
 <CAApHDvqKO00nNQtchBs65VTfjEMUsYiB5r2P4VUreTdXE9RY1g@mail.gmail.com>
 <CAMbWs48yS=f8tj6zstiMd6yfV3U4YpssyB55PXqjcLUyUA5bww@mail.gmail.com>
 <965990.1675119213@sss.pgh.pa.us>
In-Reply-To: <965990.1675119213@sss.pgh.pa.us>
From: David Rowley <dgrowleyml@gmail.com>
Date: Tue, 30 Jun 2026 11:35:19 +1200
Message-ID: 
 <CAApHDvoxZCwf7js-Xc5L=3HV65VVOOAoNm=SeTpXG9sZhR5NJQ@mail.gmail.com>
Subject: Re: BUG #17502: View based on window functions returns wrong results
 when queried
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Richard Guo <guofenglinux@gmail.com>,
 =?UTF-8?Q?Daniel_Farka=C5=A1?= <daniel.farkas@datoris.com>,
	Magnus Hagander <magnus@hagander.net>,
	PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Content-Type: text/plain; charset="UTF-8"
Archived-At: 
 <https://www.postgresql.org/message-id/CAApHDvoxZCwf7js-Xc5L%3D3HV65VVOOAoNm%3DSeTpXG9sZhR5NJQ%40mail.gmail.com>
Precedence: bulk

On Tue, 31 Jan 2023 at 11:53, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Richard Guo <guofenglinux@gmail.com> writes:
> > On Mon, May 30, 2022 at 9:12 AM David Rowley <dgrowleyml@gmail.com> wrote:
> >> The following is also pretty strange. Why should adding the SRF column
> >> to the ORDER BY change the number of output rows?
>
> > Is this a bug we should fix?
>
> This bug seems to have slipped off the radar screen, but it's still
> a bug.  I continue to believe that the best fix is to disallow SRFs
> in window definitions, and present the trivial patch to do so.
>
> As discussed, I'm comfortable with leaving this alone in the back
> branches.

There has been another report about this in bug #19535. Should we
consider going with disallowing SRFs in the WindowClause for v19?

David