From: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
---|---|
To: | Andres Freund <andres(at)2ndquadrant(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 09:02:32 |
Message-ID: | CAHGQGwE+3Z2o1yZYji8JLTvGHzj9ymKXTmTEHPv==39SNr0FrQ@mail.gmail.com |
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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?
Regards,
--
Fujii Masao
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