Re: Declarative partitioning

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Declarative partitioning
Date: 2015-08-24 07:46:59
Message-ID: CANP8+jK4CFwPCjFRYNnOeGrga1pZF6Wd+HZ0oe7Zz58ZrTTWKQ@mail.gmail.com
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On 24 August 2015 at 00:53, Josh Berkus <josh(at)agliodbs(dot)com> wrote:

> On 08/21/2015 08:34 PM, Jim Nasby wrote:
> > On 8/18/15 12:31 PM, Josh Berkus wrote:
> >> Also this would be useful for range
> >> partitions:
> >>
> >> CREATE PARTITION ON parent_table USING ( start_value );
> >>
> >> ... where start_value is the start range of the new partition. Again,
> >> easier for users to get correct.
> >
> > Instead of that, I think it would be more foolproof to do
> >
> > CREATE PARTITION ON parent_table FOR ( value1, ... );
> >
> > instead of trusting the user to get the exact start value correct.
> >
> > Though... I guess there could be value in allowing an exact start value
> > but throwing an error if it doesn't sit exactly on a boundary. Might
> > make it less likely to accidentally create the wrong partition.
>
> Well, I'm figuring that most people would use "CREATE NEXT PARTITION"
> instead.
>

ALTER TABLE foo ADD PARTITION NEXT;

when a sequence of partitions has been defined

--
Simon Riggs http://www.2ndQuadrant.com/
<http://www.2ndquadrant.com/>
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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