Re: Window function optimisation, allow pushdowns of items matching PARTITION BY clauses

* Tom Lane (tgl@sss.pgh.pa.us) wrote:
> > Why wouldn't it go back all the way to 9.0?  (assuming 8.4 is dead)
>
> People get unhappy when minor releases de-optimize queries that had
> been working for them.  It's not too late to change the behavior of
> 9.4, but I'm hesitant to do it in already-released branches, especially
> in the absence of any complaints from the field.

Agreed.  Back-patching to released versions would likely end up making
for a nasty surprise in a minor point release for some users.
Thanks,
    Stephen