Re: Distinct tightly coupled with Agg

From: Ankit Kumar Pandey <itsankitkp(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pghackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Distinct tightly coupled with Agg
Date: 2022-11-15 18:50:06
Message-ID: 57ebd11b-cbbb-d200-8702-995a0e95af4b@gmail.com
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On 16/11/22 00:26, Tom Lane wrote:
> Ankit Kumar Pandey <itsankitkp(at)gmail(dot)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

Makes sense, thank you.

Regards,

Ankit

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