Jeff Davis <pgsql@j-davis.com> writes:
> On Tue, 2011-07-12 at 11:20 -0400, Tom Lane wrote:
>> So far as I can see, the failure only
>> occurs if we have a plain (non-grouping) Agg node, which implies that
>> the user is trying to use windowing functions on a result set that's
>> guaranteed to contain exactly one aggregated row. That seems pretty
>> useless, so I'm thinking it's not worth back-patching a fix for.
>> Comments?
> Agreed. I'm not worried about backpatching it.
I've fixed this in HEAD and 9.1 only.
regards, tom lane