Re: making EXPLAIN extensible

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Jeff Davis <pgsql(at)j-davis(dot)com>, Thom Brown <thom(at)linux(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: making EXPLAIN extensible
Date: 2025-03-05 21:13:06
Message-ID: CA+TgmoZR-j1nqc9uz-9SMb2BecM-_bz4btixJ2X=9JCaCuEWEQ@mail.gmail.com
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On Wed, Mar 5, 2025 at 4:00 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Ah. I was mistakenly assuming that 0001 would compile on its own ;-)

Oopsie.

> Got it. So does that mean we can remove any #include's from explain.h
> after moving the struct definition?

Good question. It looks like "lib/stringinfo.h" can come out but the
other two are still needed, so there is not much gain. But I've made
that change in the attached v4.

I also added "= NULL" to a couple of variable initialization in 0003
in this version, because Andres pointed out to me that cfbot was
seeing compiler warnings. It's a little odd that it warned, because
the variables were initialized by a switch over all enum values, but I
guess some compiler doesn't find that convincing enough.

--
Robert Haas
EDB: http://www.enterprisedb.com

Attachment Content-Type Size
v4-0002-Add-some-new-hooks-so-extensions-can-add-details-.patch application/octet-stream 4.3 KB
v4-0003-pg_overexplain-Additional-EXPLAIN-options-for-deb.patch application/octet-stream 59.0 KB
v4-0001-Make-it-possible-for-loadable-modules-to-add-EXPL.patch application/octet-stream 29.3 KB

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