Horton

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

Julien Rouhaud <rjuju123@gmail.com>

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From: Julien Rouhaud <rjuju123@gmail.com>
To: Bruce Momjian <bruce@momjian.us>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>, Hannu Krosing <hannuk@google.com>, Robert Haas <robertmhaas@gmail.com>, Pavel Stehule <pavel.stehule@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, 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: 2021-03-24T15:20:49Z
Lists: pgsql-hackers

Attachments

On Wed, Mar 24, 2021 at 08:13:40AM -0400, Bruce Momjian wrote:
> On Wed, Mar 24, 2021 at 04:51:40PM +0800, Julien Rouhaud wrote:
> > > but if you do that it'd be better to avoid
> > > introducing a function with one name and renaming it in your next
> > > commit.
> > 
> > Oops, I apparently messed a fixup when working on it.  Bruce, should I take
> > care of that of do you want to?  I think you have some local modifications
> > already I'd rather not miss some changes.
> 
> I have no local modifications.  Please modify the patch I posted and
> repost your version, thanks.

Ok!  I used the last version of the patch you sent and addressed the following
comments from earlier messages in attached v20:

- copyright year to 2021
- s/has has been compute/has been compute/
- use the name CleanQuerytext in the first commit

I didn't change the position of queryid in pg_stat_get_activity(), as the
"real" order is actually define in system_views.sql when creating
pg_stat_activity view.  Adding the new fields at the end of
pg_stat_get_activity() helps to keep the C code simpler and less bug prone, so
I think it's best to continue this way.

I also used the previous commit message if that helps.

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'