Re: Distinct tightly coupled with Agg

Ankit Kumar Pandey <itsankitkp@gmail.com> writes:
> I am looking at todo item (#1) /Implement DISTINCT clause in window 
> aggregates/ and while looking at code, I found distinct tightly coupled 
> with Agg function. Looking at another todo item(#2) /Do we really need 
> so much duplicated code between Agg and WindowAgg/?  I was wondering 
> what is general stance on this? Is #2 per-requisite for #1?

No, I think #2 is just a general statement of annoyance.  It'd be
great if someone finds a way to refactor things to improve that; but
seeing that window functions operate in a much different environment
than plain aggregates, I'm not holding my breath.  It's certainly
not a prerequisite for any other work in the area.

            regards, tom lane