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In-Reply-To: <2799576.1759976008@sss.pgh.pa.us>
From: Richard Guo <guofenglinux@gmail.com>
Date: Thu, 9 Oct 2025 12:10:31 +0900
Message-ID: 
 <CAMbWs4_SLP-Qw8DMsY3Gc56GmLiMNWXnf5g1BwMFGq09BJRx-A@mail.gmail.com>
Subject: Re: Eager aggregation, take 3
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Robert Haas <robertmhaas@gmail.com>, David Rowley <dgrowleyml@gmail.com>,
	Tender Wang <tndrwang@gmail.com>, Paul George <p.a.george19@gmail.com>,
	Andy Fan <zhihuifan1213@163.com>,
	PostgreSQL-development <pgsql-hackers@postgresql.org>,
 pgsql-hackers@lists.postgresql.org,
	Matheus Alcantara <matheusssilv97@gmail.com>
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On Thu, Oct 9, 2025 at 11:13=E2=80=AFAM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Richard Guo <guofenglinux@gmail.com> writes:
> > On Wed, Oct 8, 2025 at 11:45=E2=80=AFPM Robert Haas <robertmhaas@gmail.=
com> wrote:
> >> For what it's worth, I also don't like that field name. I'm not sure
> >> what to propose instead, but I don't think apply_at is very clear.

> > This field represents the set of relids at which partial aggregation
> > is applied.  So how about naming it partial_agg_designated_relids?
> > That feels a bit verbose, though.  How about partial_agg_relids or,
> > for brevity, agg_relids instead?

> I might be missing a subtlety here, but how about
> "apply_aggregation_at" or "apply_partial_agg_at"?
>
> I don't think including "relids" in the field name adds anything,
> given the field's declared type and comments.

Fair point.

'agg' seems better to me than 'aggregation' when used in a name: it's
shorter, and it's unlikely anyone would interpret it as anything other
than "aggregation".

I kind of wonder whether we need to include 'partial' in the name.
Given the context, it seems very clear that we're referring to
partial aggregation rather than final aggregation.

So I'm weighing between "apply_partial_agg_at" and "apply_agg_at".

- Richard