Re: 8.4, 9.0 bug (doesn't exist in 9.1) related to window functions

On Thu, 2012-01-26 at 20:43 -0500, Tom Lane wrote:
> Jeff Davis <pgsql@j-davis.com> writes:
> > => select ntile(3) OVER ( ORDER BY CASE WHEN count(i) = 0 THEN NULL ELSE
> > count(i) END asc ) from ( SELECT NULL::integer as i limit 0 ) s ;
> > ERROR:  cannot extract attribute from empty tuple slot
>
> I believe this is the same case fixed here:
> http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=c1d9579dd
>
> and as noted in that commit message, it didn't appear worth the risk
> of fixing it in released branches.

Thank you. For the record, it looks like the one that fixed the similar
problem in early 9.1 was here:

http://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=269c5dd2f46e3490da05d5dd5dad07828df281d9

Regards,
    Jeff Davis