Re: PG 10 release notes

On Thu, May 4, 2017 at 05:09:40PM -0700, Andres Freund wrote:
> > > I would not in any way refer to logical decoding as being only a proof
> > > of concept, even before logical replication.
> >
> > The community ships a reliable logical _encoding_, and a test logical
> > _decoding_.
>
> Yes, so what? What you said is "I didn't think logical decoding was
> really more than a proof-of-concept until now", which is plainly wrong,
> given I know a significant number of users using it in production. Some
> of them are well known & large enterprises, and it's used to enable
> critical things.

I am getting tired of saying this. When I am writing the release notes,
I am trying to figure out how it affects our shipped code, and the only
"decoding" I know of is test_decoding. My message was this:

https://www.postgresql.org/message-id/a6d13cf7-fbf8-913c-2353-f149c6f95fdc%402ndquadrant.com
>
>> Or the ability of logical decoding to follow timeline switches.
>
> I didn't think logical decoding was really more than a proof-of-concept
> until now.

Now, if the "encoding" was changed so the external decoders can do more,
or the API we supply to the decoders has new abilities, that is fine to
mention, but someone needs to say that. That is an "encoding" change,
right?

I said nothing about external decoders, only the user-interface decoder
we ship.

I assume it is this commit:

Author: Simon Riggs <simon(at)2ndQuadrant(dot)com>
2017-03-22 [1148e22a8] Teach xlogreader to follow timeline switches

Teach xlogreader to follow timeline switches

Uses page-based mechanism to ensure we’re using the correct timeline.

Tests are included to exercise the functionality using a cold disk-level copy
of the master that's started up as a replica with slots intact, but the
intended use of the functionality is with later features.

Craig Ringer, reviewed by Simon Riggs and Andres Freund

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