Re: no default hash partition

Alvaro Herrera <alvherre@2ndquadrant.com>

From: Alvaro Herrera <alvherre@2ndquadrant.com>
To: Amit Langote <amitlangote09@gmail.com>
Cc: Pg Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2019-08-07T16:29:45Z
Lists: pgsql-hackers
On 2019-Aug-07, Amit Langote wrote:

> That hash-partitioned tables can't have default partition is mentioned
> in the CREATE TABLE page:
> 
> "If DEFAULT is specified, the table will be created as a default
> partition of the parent table. The parent can either be a list or
> range partitioned table. A partition key value not fitting into any
> other partition of the given parent will be routed to the default
> partition. There can be only one default partition for a given parent
> table."

Actually, it also says this (in the blurb for the PARTITION OF clause):

      Creates the table as a <firstterm>partition</firstterm> of the specified
      parent table. The table can be created either as a partition for specific
      values using <literal>FOR VALUES</literal> or as a default partition
      using <literal>DEFAULT</literal>.  This option is not available for
      hash-partitioned tables.

which I think is sufficient.

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



Commits

  1. Clarify the default partition's role

  2. Add comment on no default partition with hash partitioning