Re: Logical decoding output plug-in questions - Mailing list pgsql-general

From Andres Freund
Subject Re: Logical decoding output plug-in questions
Date
Msg-id 20150126234217.GC4655@awork2.anarazel.de
Whole thread Raw
In response to Re: Logical decoding output plug-in questions  (Christophe Pettus <xof@thebuild.com>)
List pgsql-general
On 2015-01-26 15:35:39 -0800, Christophe Pettus wrote:
> On Jan 26, 2015, at 2:24 PM, Andres Freund <andres@2ndquadrant.com> wrote:
>
> > What's in the old tuple depends on the configured replica identity.
>
> My apologies, but... "configured replica identity"?

Search for "postgres" and "replica identity".

> >      The <literal>is_init</literal> parameter will be true when the
> >      replication slot is being created [...]
>
> Thanks!  I suppose my question then is: Besides slot creation, when is pg_decode_startup called?

Whenever changes from a slot are starting to be consumed. I.e. when you
call one of the SQL functions pg_logical_slot_*_changes or when the
walsender receives a START_LOGICAL_REPLICATION.

Greetings,

Andres Freund

--
 Andres Freund                       http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services


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