| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
| Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, furuyao(at)pm(dot)nttdata(dot)co(dot)jp, Magnus Hagander <magnus(at)hagander(dot)net>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pg_receivexlog and replication slots |
| Date: | 2014-08-19 09:03:55 |
| Message-ID: | 20140819090355.GC11993@awork2.anarazel.de |
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| Lists: | pgsql-hackers |
On 2014-08-19 18:02:32 +0900, Fujii Masao wrote:
> On Tue, Aug 19, 2014 at 5:52 PM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> > On 2014-08-18 14:38:06 +0900, Michael Paquier wrote:
> >> - IDENTIFY_SYSTEM checks were incorrect (even in HEAD). The following
> >> check was done but in 9.4 this command returns 4 fields:
> >> (PQntuples(res) != 1 || PQnfields(res) < 3)
> >
> > Which is correct. We don't want to error out in the case where 3 columns
> > are returned because that'd unnecessarily break compatibility with <
> > 9.4. Previously that check was != 3...
> >
> > This isn't a bug.
>
> Okay, I understood why you didn't update those codes.
>
> Since we don't allow replication between different major versions,
> it's better to apply this change at least into libpqwalreceiver.c. Thought?
We'd discussed that we'd rather keep it consistent. It also results in a
more explanatory error message lateron.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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