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In-Reply-To: 
 <CAA5RZ0uStx0cWUCNPDPhBprAVmcdOX-uuKd9B_W9qLa6Tsp46w@mail.gmail.com>
From: Fujii Masao <masao.fujii@gmail.com>
Date: Fri, 13 Mar 2026 03:09:19 +0900
Message-ID: 
 <CAHGQGwF3=y-j5LxHdXtthEsmJYY5U6WtcAsgwbestfCtNvvuaw@mail.gmail.com>
Subject: Re: Add missing stats_reset column to pg_stat_database_conflicts view
To: Sami Imseih <samimseih@gmail.com>
Cc: Chao Li <li.evan.chao@gmail.com>, shihao zhong <zhong950419@gmail.com>,
	Kirill Reshke <reshkekirill@gmail.com>,
	PostgreSQL-development <pgsql-hackers@postgresql.org>
Content-Type: multipart/mixed; boundary="0000000000009015af064cd7a745"
Archived-At: 
 <https://www.postgresql.org/message-id/CAHGQGwF3%3Dy-j5LxHdXtthEsmJYY5U6WtcAsgwbestfCtNvvuaw%40mail.gmail.com>
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--0000000000009015af064cd7a745
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

On Fri, Mar 13, 2026 at 1:21=E2=80=AFAM Sami Imseih <samimseih@gmail.com> w=
rote:
>
> Thanks for the updated patch!
>
> --- Since pg_stat_database stats_reset starts out as NULL, reset it
> once first so we have something to compare it to
> +-- Since stats_reset in pg_stat_database and pg_stat_database_conflicts =
starts
> +-- out as NULL, reset it once first so we have something to compare it t=
o
> SELECT pg_stat_reset();
> -SELECT stats_reset AS db_reset_ts FROM pg_stat_database WHERE datname
> =3D (SELECT current_database()) \gset
> +SELECT D.stats_reset AS db_reset_ts, DC.stats_reset AS dbc_reset_ts
> +FROM pg_stat_database D, pg_stat_database_conflicts DC
> +WHERE D.datname =3D (SELECT current_database()) AND D.datname =3D DC.dat=
name \gset
> SELECT pg_stat_reset();
> -SELECT stats_reset > :'db_reset_ts'::timestamptz FROM
> pg_stat_database WHERE datname =3D (SELECT current_database());
> +SELECT D.stats_reset > :'db_reset_ts'::timestamptz,
> + DC.stats_reset > :'dbc_reset_ts'::timestamptz,
> + D.stats_reset =3D DC.stats_reset
> +FROM pg_stat_database D, pg_stat_database_conflicts DC
> +WHERE D.datname =3D (SELECT current_database()) AND D.datname =3D DC.dat=
name;
>
> I think the changes to the test are overcomplicated unnecessarly. We shou=
ld not
> have to join pg_stat_database and pg_stat_database_conflicts. We can just
> query each fo the stats_reset separately. see v5, I kept the check to
> ensure that
> pg_stat_database and pg_stat_database_conflicts have the same reset
> time. I think
> this is good to have as well. I also updated the existing comment for
> more clarity.

Thanks for updating the patch! I like the simplified test.

+SELECT stats_reset AS dbc_reset_ts FROM pg_stat_database_conflicts
WHERE datname =3D  (SELECT current_database()) \gset

I removed the extra space.

I also made some cosmetic indentation fixes in the docs.
The v6 patch is attached.

Unless there are objections, I'll update the catversion and commit it.

Regards,

--=20
Fujii Masao

--0000000000009015af064cd7a745
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	name="v6-0001-Add-stats_reset-column-to-pg_stat_database_confli.patch"
Content-Disposition: attachment;
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