Re: custom average window function failure

On Sun, 09 Oct 2016 16:00:21 -0400,
Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> "Sebastian P. Luque" <spluque(at)gmail(dot)com> writes:
>> Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>> On closer inspection, the error is only in the
>>> aggregate-used-as-window-function case, not plain aggregation.

>> Yes, I see the same phenomenon. Could someone suggest a workaround
>> until this is fixed? I'm under the gun to submit output tables and
>> the only thing I can think of is a crawling slow loop to step through
>> each window twice: once using the plain aggregation and another
>> without just get all rows. I highly doubt it will be worthwhile,
>> given it's going to be about 1000 iterations, and each one would take
>> about 30-45 min...

> Are you in a position to apply patches? It's a one-line fix:
> https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=dca25c2562199ce1e7e26367613912a8eadbbde8

> Alternatively, the problem doesn't manifest when the aggregate
> transtype and output type are the same, so you could probably refactor
> your code to use plain array_agg and apply the finalfunc separately in
> the SQL query.

Perfect, I'll try the latter option on this one. Thanks so much to both
of you for your prompt feedback!

--
Seb