Re: Declarative Range Partitioning Postgres 11

On Fri, Nov 1, 2019 at 9:22 AM Shatamjeev Dewan <sdewan(at)nbsps(dot)com> wrote:

> Hi Michael,
>
>
>
> I want to create a partition by year and subpartition by month in postgres
> 11 timestamp column. Please advise syntax.
>

https://www.postgresql.org/docs/11/ddl-partitioning.html

The documentation is rather clear with examples like-

CREATE TABLE measurement_y2006m02 PARTITION OF measurement
FOR VALUES FROM ('2006-02-01') TO ('2006-03-01');
CREATE TABLE measurement_y2006m03 PARTITION OF measurement
FOR VALUES FROM ('2006-03-01') TO ('2006-04-01');

Note- Don't partition on function results like date_part because
performance will likely suffer greatly. Also note that the top end is
always exclusive so the above give a continuous range for those two months.

I would hesitate to partition by more than year alone before upgrading to
PG v12. The speed improvements for more than 10-100 partitions (max
recommended for PG11) is huge in 12.