Re: Feature improvement: can we add queryId for pg_catalog.pg_stat_activity view?

Zhihong Yu <zyu@yugabyte.com>

From: Zhihong Yu <zyu@yugabyte.com>
To: Bruce Momjian <bruce@momjian.us>
Cc: Julien Rouhaud <rjuju123@gmail.com>, Hannu Krosing <hannuk@google.com>, Robert Haas <robertmhaas@gmail.com>, Pavel Stehule <pavel.stehule@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Alvaro Herrera <alvherre@alvh.no-ip.org>, Michael Paquier <michael@paquier.xyz>, torikoshia <torikoshia@oss.nttdata.com>, Atsushi Torikoshi <atorik@gmail.com>, Tatsuro Yamada <tatsuro.yamada.tf@nttcom.co.jp>, Tomas Vondra <tomas.vondra@2ndquadrant.com>, Evgeny Efimkin <efimkin@yandex-team.ru>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2021-03-23T00:17:15Z
Lists: pgsql-hackers
Hi,
For queryjumble.c :

+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group

The year should be updated.
Same with queryjumble.h

Cheers

On Mon, Mar 22, 2021 at 2:56 PM Bruce Momjian <bruce@momjian.us> wrote:

> On Sat, Mar 20, 2021 at 02:12:34PM +0800, Julien Rouhaud wrote:
> > On Fri, Mar 19, 2021 at 12:53:18PM -0400, Bruce Momjian wrote:
> > >
> > > Well, given we don't really want to support multiple query id types
> > > being generated or displayed, the "error out" above should fix it.
> > >
> > > Let's do this --- tell extensions to error out if the query id is
> > > already set, either by compute_query_id or another extension.  If an
> > > extension wants to generate its own query id and store is internal to
> > > the extension, that is fine, but the server-displayed query id should
> be
> > > generated once and never overwritten by an extension.
> >
> > Agreed, this will ensure that you won't dynamically change the queryid
> source.
> >
> > We should also document that changing it requires a restart and calling
> > pg_stat_statements_reset() afterwards.
> >
> > v19 adds some changes, plus extra documentation for pg_stat_statements
> about
> > the requirement for a queryid to be calculated, and a note that all
> documented
> > details only apply for in-core source.  I'm not sure if this is still
> the best
> > place to document those details anymore though.
>
> OK, after reading the entire thread, I don't think there are any
> remaining open issues with this patch and I think this is ready for
> committing.  I have adjusted the doc section of the patches, attached.
> I have marked myself as committer in the commitfest app and hope to
> apply it in the next few days based on feedback.
>
> --
>   Bruce Momjian  <bruce@momjian.us>        https://momjian.us
>   EDB                                      https://enterprisedb.com
>
>   If only the physical world exists, free will is an illusion.
>
>

Commits

  1. Clarify description of pg_stat_statements columns

  2. Fix wording in description of pg_stat_statements.toplevel

  3. Mention that toplevel is part of pg_stat_statements key.

  4. adjust query id feature to use pg_stat_activity.query_id

  5. Update copyright for 2021

  6. Take the statistics collector out of the loop for monitoring backends'