Re: [HACKERS] Adding support for Default partition in partitioning

On Tue, Apr 11, 2017 at 9:41 AM, Jeevan Ladhe
<jeevan.ladhe@enterprisedb.com> wrote:
> I have checked for NULLs too, and the default partition can be created even
> when there are partitions for each TRUE, FALSE and NULL.
>
> Consider the example below:
>
> postgres=# CREATE TABLE list_partitioned (
>     a bool
> ) PARTITION BY LIST (a);
> CREATE TABLE
> postgres=# CREATE TABLE part_1 PARTITION OF list_partitioned FOR VALUES IN
> ('false');
> CREATE TABLE
> postgres=# CREATE TABLE part_2 PARTITION OF list_partitioned FOR VALUES IN
> ('true');
> CREATE TABLE
> postgres=# CREATE TABLE part_3 PARTITION OF list_partitioned FOR VALUES IN
> (null);
> CREATE TABLE
> postgres=# CREATE TABLE part_default PARTITION OF list_partitioned FOR
> VALUES IN (DEFAULT);
> CREATE TABLE

In my opinion, that's absolutely fine, and it would be very strange to
try to prevent it.  The partitioning method shouldn't have specific
knowledge of the properties of individual data types.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company