Re: New partitioning - some feedback

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Craig Ringer <craig(at)2ndquadrant(dot)com>, David Fetter <david(at)fetter(dot)org>, Mark Kirkwood <mark(dot)kirkwood(at)catalyst(dot)net(dot)nz>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: New partitioning - some feedback
Date: 2017-07-11 04:34:44
Message-ID: 20170711043444.jgvrtvr6canuvuow@alvherre.pgsql
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Robert Haas wrote:
> On Mon, Jul 10, 2017 at 2:15 AM, Amit Langote
> <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp> wrote:

> > Actually, if \d had shown RELKIND_PARTITIONED_TABLE tables as of Type
> > "partitioned table", we wouldn't need a separate flag for marking a table
> > as having partitions.
>
> I think that is false. Whether something is partitioned and whether
> it is a partition are independent concerns.

Maybe this discussion is easier if we differentiate "list tables" (\dt,
or \d without a pattern) from "describe table" (\d with a name pattern).

It seems to me that the "describe" command should list partitions --
perhaps only when the + flag is given. However, the "list tables"
command \dt should definitely IMO not list partitions. Maybe \dt should
have some flag indicating whether each table is partitioned.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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