Re: Order of pg_stat_activity timestamp columns

Magnus Hagander wrote:
> On Wed, Mar 17, 2010 at 21:42, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> > Has anyone ever noticed that the order of pg_stat_activity timestamp
> > columns is illogical:
> >
> > ?xact_start ? ? ? | timestamp with time zone |
> > ?query_start ? ? ?| timestamp with time zone |
> > ?backend_start ? ?| timestamp with time zone |
>
> Well, 7.4 had only "query start". 8.1 added backend. 8.3 added
> transaction. So I guess my original guess that things were just added
> on the end was wrong :-)
>
>
> > query_start is always between the other two timestamps. ?Moving
> > query_start before xact_start would make the most sense. ?I wouldn't
> > bring this up except we just added application_name before these
> > columns, so we are already going to have different column locations for
> > these fields in 9.0.
> >
> > Should we move query_start?
>
> Or perhaps we should consider moving application_name to the end so it
> *doesn't* break them?

That's a possibility, but we obviously have been adding columns
out-of-order for several releases now and no one has complained.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

PG East: http://www.enterprisedb.com/community/nav-pg-east-2010.do