From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Amit Langote <amitlangote09@gmail.com>
Cc: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Cc: Simon Riggs <simon@2ndquadrant.com>
Cc: yuzuko <yuzukohosoya@gmail.com>
Cc: shawn wang <shawn.wang.pg@gmail.com>
Cc: Shawn Wang <shawn.wang@highgo.ca>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: Problem with default partition pruning
Date: Tue, 13 Aug 2019 11:25:17 -0400
Message-ID: <20190813152517.GA9767@alvherre.pgsql> (raw)
In-Reply-To: <CA+HiwqGNfQzz9ywuT6OSisqPpEXZRcsFFa0F1u1d=0LN3inyVA@mail.gmail.com>
On 2019-Aug-13, Amit Langote wrote:
> Thanks a lot for revising. Looks neat, except:
>
> + * This is a measure of last resort only to be used because the default
> + * partition cannot be pruned using the steps; regular pruning, which is
> + * cheaper, is sufficient when no default partition exists.
>
> This text appears to imply that the default can *never* be pruned with
> steps. Maybe, the first sentence should read something like: "...the
> default cannot be pruned using the steps generated from clauses that
> contradict the parent's partition constraint".
Thanks! I have pushed it with this change.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-hackers@postgresql.org
Cc: alvherre@2ndquadrant.com, amitlangote09@gmail.com, horikyota.ntt@gmail.com, simon@2ndquadrant.com, yuzukohosoya@gmail.com, shawn.wang.pg@gmail.com, shawn.wang@highgo.ca, pgsql-hackers@lists.postgresql.org
Subject: Re: Problem with default partition pruning
In-Reply-To: <20190813152517.GA9767@alvherre.pgsql>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox