Re: Adding support for Default partition in partitioning

Jeevan Ladhe <jeevan.ladhe@enterprisedb.com>

From: Jeevan Ladhe <jeevan.ladhe@enterprisedb.com>
To: Ashutosh Bapat <ashutosh.bapat@enterprisedb.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Rahila Syed <rahilasyed90@gmail.com>, Keith Fiske <keith@omniti.com>, Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>, Rushabh Lathia <rushabh.lathia@gmail.com>, David Steele <david@pgmasters.net>, Peter Eisentraut <peter.eisentraut@2ndquadrant.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2017-04-24T18:39:14Z
Lists: pgsql-hackers
On Mon, Apr 24, 2017 at 5:44 PM, Ashutosh Bapat <
ashutosh.bapat@enterprisedb.com> wrote:

> On Mon, Apr 24, 2017 at 4:24 PM, Robert Haas <robertmhaas@gmail.com>
> wrote:
> > On Mon, Apr 24, 2017 at 5:10 AM, Rahila Syed <rahilasyed90@gmail.com>
> wrote:
> >> Following can also be considered as it specifies more clearly that the
> >> partition holds default values.
> >>
> >> CREATE TABLE ...PARTITION OF...FOR VALUES DEFAULT;
> >
> > Yes, that could be done.  But I don't think it's correct to say that
> > the partition holds default values.  Let's back up and ask what the
> > word "default" means.  The relevant definition (according to Google or
> > whoever they stole it from) is:
> >
> > a preselected option adopted by a computer program or other mechanism
> > when no alternative is specified by the user or programmer.
> >
> > So, a default *value* is the value that is used when no alternative is
> > specified by the user or programmer. We have that concept, but it's
> > not what we're talking about here: that's configured by applying the
> > DEFAULT property to a column.  Here, we're talking about the default
> > *partition*, or in other words the *partition* that is used when no
> > alternative is specified by the user or programmer.  So, that's why I
> > proposed the syntax I did.  The partition doesn't contain default
> > values; it is itself a default.
>
> Is CREATE TABLE ... DEFAULT PARTITION OF ... feasible? That sounds more
> natural.
>

+1

Commits

  1. Allow a partitioned table to have a default partition.

  2. Adjust min/max values when changing sequence type

  3. BRIN auto-summarization