Re: track generic and custom plans in pg_stat_statements

From: Sami Imseih <samimseih(at)gmail(dot)com>
To: Andrei Lepikhov <lepihov(at)gmail(dot)com>
Cc: Michael Paquier <michael(at)paquier(dot)xyz>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Greg Sabino Mullane <htamfids(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Nikolay Samokhvalov <nik(at)postgres(dot)ai>, Ilia Evdokimov <ilya(dot)evdokimov(at)tantorlabs(dot)com>
Subject: Re: track generic and custom plans in pg_stat_statements
Date: 2025-07-30 19:05:09
Message-ID: CAA5RZ0sgLNBKUdceqvoxNCbn9rirJhH6bUjAmSZB6557cbcG4Q@mail.gmail.com
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> > The term "NOT_SET" makes me itch a little bit, even if there is an
> > existing parallel with OverridingKind. Perhaps your proposal is OK,
> > still how about "UNKNOWN" instead to use as term for the default?
> +1 to "UNKNOWN".

We currently use both UNKNOWN and NOT_SET in different places.
However, I'm okay with using UNKNOWN, and I've updated it in v16.

> But generally, classification in the PlannedStmtOrigin structure seems a
> little strange: a generic plan has a qualitative difference from any
> custom one. And any other plan also will be generic or custom, doesn't
> it?

I am not sure I understand the reasoning here. Can you provide more details/
specific examples?

--
Sami

Attachment Content-Type Size
v16-0001-Introduce-planOrigin-field-in-PlannedStmt-to-rep.patch application/octet-stream 7.8 KB
v16-0002-pg_stat_statements-Add-counters-for-generic-and-.patch application/octet-stream 26.2 KB

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