Re: Window-functions patch handling of aggregates

"Robert Haas" <robertmhaas@gmail.com> writes:
> Unfortunately, if we don't want to add an explicit iswindowable flag
> (and I understand that that's ugly), then I think this is the way to
> go.  It's a shame that people will have to make code changes, but
> inventing a fake AggState object just to get around this problem
> sounds worse.  The array_agg code is new and the fact that it doesn't
> follow the design pattern should be considered a bug in that code
> rather than a justification for an ugly workaround.

Well, array_agg may be new but it's simply a re-implementation of a
design pattern that existed in contrib/intagg since 7.3 or so.  I have
no problem with fixing array_agg --- what I'm wondering about is who
has copied intagg before.
        regards, tom lane