Subject: Re: Documentation improvements for partitioning
To: Robert Haas <robertmhaas@gmail.com>, Simon Riggs <simon@2ndquadrant.com>
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Cc: Bruce Momjian <bruce@momjian.us>,
 Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>,
 Corey Huinker <corey.huinker@gmail.com>,
 Pg Hackers <pgsql-hackers@postgresql.org>
From: Petr Jelinek <petr.jelinek@2ndquadrant.com>
Message-ID: <f6317f9a-7368-b196-207f-2e425e57eff3@2ndquadrant.com>
Date: Sun, 26 Feb 2017 19:18:54 +0100
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On 24/02/17 07:15, Robert Haas wrote:
> On Fri, Feb 24, 2017 at 9:53 AM, Simon Riggs <simon@2ndquadrant.com> wrote:
>> The good news is that logical replication DOES work with partitioning,
>> but only for a Publication with PUBLISH INSERT, pushing from a normal
>> table to a partitioned one. Which is useful enough for first release.
>>
>> The work on having UPDATE work between partitions can be used to make
>> updates and deletes work in logical replication. That might yet be
>> made to work in this release, and I think we should look into it, but
>> I think it can be left til next release if we try.
> 
> Are you speaking of the case where you want to replicate from an
> unpartitioned table to a partitioned table?  I would imagine that if
> you are replicating between two identical partitioning hierarchies, it
> would just work.  (If not, that's probably a bug, though I don't know
> whose bug.)
> 

Yes same hierarchies will work but mainly because one has to add
partitions themselves to publication currently. I guess that's the
limitation we might have to live with in 10 as adding the whole
partitioned table should probably work for different hierarchies when we
enable it and I am not quite sure that's doable before start of the CF
at this point.

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


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