| From: | Julien Rouhaud <rjuju123(at)gmail(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Nitin Jadhav <nitinjadhavpostgres(at)gmail(dot)com>, Hannu Krosing <hannuk(at)google(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, torikoshia <torikoshia(at)oss(dot)nttdata(dot)com>, Atsushi Torikoshi <atorik(at)gmail(dot)com>, Tatsuro Yamada <tatsuro(dot)yamada(dot)tf(at)nttcom(dot)co(dot)jp>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Evgeny Efimkin <efimkin(at)yandex-team(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Feature improvement: can we add queryId for pg_catalog.pg_stat_activity view? |
| Date: | 2021-04-08 16:38:29 |
| Message-ID: | 20210408163829.o37wgnsrwdbrew4u@nol |
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| Lists: | pgsql-hackers |
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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