From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Julien Rouhaud <rjuju123@gmail.com>
Cc: torikoshia <torikoshia@oss.nttdata.com>
Cc: Atsushi Torikoshi <atorik@gmail.com>
Cc: Tatsuro Yamada <tatsuro.yamada.tf@nttcom.co.jp>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Michael Paquier <michael@paquier.xyz>
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: Mon, 5 Oct 2020 19:58:42 -0300
Message-ID: <20201005225842.GA8918@alvherre.pgsql> (raw)
In-Reply-To: <1817289.1601934179@sss.pgh.pa.us>
On 2020-Oct-05, Tom Lane wrote:
> FWIW, I think this proposal is a mess. I was willing to hold my nose
> and have a queryId field in the internal Query struct without any solid
> consensus about what its semantics are and which extensions get to use it.
> Exposing it to end users seems like a bridge too far, though. In
> particular, I'm afraid that that will cause people to expect it to have
> consistent values across PG versions, or even just across architectures
> within one version.
I wonder if it would help to purposefully change the computation so that
it is not -- for instance, hash the system_identifier as initial value.
Then users would be forced to accept that it'll change as soon as it
migrates to another server or is upgraded to a new major version.
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To: pgsql-hackers@postgresql.org
Cc: alvherre@alvh.no-ip.org, tgl@sss.pgh.pa.us, bruce@momjian.us, rjuju123@gmail.com, torikoshia@oss.nttdata.com, atorik@gmail.com, tatsuro.yamada.tf@nttcom.co.jp, robertmhaas@gmail.com, tomas.vondra@2ndquadrant.com, michael@paquier.xyz, 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: <20201005225842.GA8918@alvherre.pgsql>
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