From: Julien Rouhaud <rjuju123@gmail.com>
To: Bruce Momjian <bruce@momjian.us>
Cc: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Nitin Jadhav <nitinjadhavpostgres@gmail.com>
Cc: Hannu Krosing <hannuk@google.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Pavel Stehule <pavel.stehule@gmail.com>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: torikoshia <torikoshia@oss.nttdata.com>
Cc: Atsushi Torikoshi <atorik@gmail.com>
Cc: Tatsuro Yamada <tatsuro.yamada.tf@nttcom.co.jp>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Evgeny Efimkin <efimkin@yandex-team.ru>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Feature improvement: can we add queryId for pg_catalog.pg_stat_activity view?
Date: Fri, 9 Apr 2021 00:38:29 +0800
Message-ID: <20210408163829.o37wgnsrwdbrew4u@nol> (raw)
In-Reply-To: <20210408153425.GC2439@momjian.us>
References: <20210408024229.GJ24239@momjian.us>
<20210408032704.GA7498@alvherre.pgsql>
<20210408153425.GC2439@momjian.us>
On Thu, Apr 08, 2021 at 11:34:25AM -0400, Bruce Momjian wrote:
>
> OK, let's get some details. First, pg_stat_statements.queryid already
> exists (no underscore), and I don't think anyone wants to change that.
>
> pg_stat_activity.queryid is new, but I can imagine cases where you would
> join pg_stat_activity to pg_stat_statements to get an estimate of how
> long the query will take --- having one using an underscore and another
> one not seems odd.
Indeed, and also being able to join with a USING clause rather than an ON could
also save some keystrokes. But unfortunately, we already have (userid, dbid)
on pg_stat_statements side vs (usesysid, datid) on pg_stat_activity side, so
this unfortunately won't fix all the oddities.
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Cc: rjuju123@gmail.com, bruce@momjian.us, alvherre@alvh.no-ip.org, tgl@sss.pgh.pa.us, nitinjadhavpostgres@gmail.com, hannuk@google.com, robertmhaas@gmail.com, pavel.stehule@gmail.com, michael@paquier.xyz, torikoshia@oss.nttdata.com, atorik@gmail.com, tatsuro.yamada.tf@nttcom.co.jp, tomas.vondra@2ndquadrant.com, efimkin@yandex-team.ru, pgsql-hackers@lists.postgresql.org
Subject: Re: Feature improvement: can we add queryId for pg_catalog.pg_stat_activity view?
In-Reply-To: <20210408163829.o37wgnsrwdbrew4u@nol>
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