From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
---|---|
To: | Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp> |
Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: partitioned indexes and tablespaces |
Date: | 2018-11-02 15:02:38 |
Message-ID: | 20181102150238.sthbehzz756auovh@alvherre.pgsql |
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Lists: | pgsql-hackers |
On 2018-Nov-02, Amit Langote wrote:
> On 2018/11/02 10:27, Michael Paquier wrote:
> > It seems to me that the current behavior is wanted in this case, because
> > partitioned tables and partitioned indexes have no physical storage.
>
> Keith Fiske complained about this behavior for partitioned *tables* a few
> months ago, which led to the following discussion:
>
> https://www.postgresql.org/message-id/flat/CAKJS1f9PXYcT%2Bj%3DoyL-Lquz%3DScNwpRtmD7u9svLASUygBdbN8w%40mail.gmail.com
>
> It's Michael's message that was the last one on that thread. :)
>
> https://www.postgresql.org/message-id/20180413224007.GB27295%40paquier.xyz
I agree with Fiske, FWIW. I think the current behavior results because
people (including me) overlooked things, not because it was designed
explicitly that way.
> By the way, if we decide to do something about this, I think we do the
> same for partitioned tables.
I'm up for changing the behavior of partitioned tables in pg12 (please
send a patch), but I'm up for changing the behavior of partitioned
tables in pg11.
> There are more than one interesting
> behaviors possible that are mentioned in the above thread for when
> parent's reltablespace is set/changed.
I'm *NOT* proposing to move existing partitions to another tablespace,
in any case.
> IOW, I agree with Michael that if something will be back-patched to 11, it
> should be a small patch to make the unsupported relkind error go away.
I don't.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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