Re: [HACKERS] utility commands benefiting from parallel plan

On Sat, Feb 25, 2017 at 3:21 AM, Robert Haas <robertmhaas@gmail.com> wrote:

On Fri, Feb 24, 2017 at 11:43 AM, Haribabu Kommi
<kommi.haribabu@gmail.com> wrote:
> Here I attached an implementation patch that allows
> utility statements that have queries underneath such as
> CREATE TABLE AS, CREATE MATERIALIZED VIEW
> and REFRESH commands to benefit from parallel plan.
>
> These write operations not performed concurrently by the
> parallel workers, but the underlying query that is used by
> these operations are eligible for parallel plans.
>
> Currently the write operations are implemented for the
> tuple dest types DestIntoRel and DestTransientRel.
>
> Currently I am evaluating other write operations that can
> benefit with parallelism without side effects in enabling them.
>
> comments?

I think a lot more work than this will be needed.  See:

https://www.postgresql.org/message-id/CA+TgmoZC5ft_t9uQWSO5_1vU6H8oVyD=zyuLvRnJqTN==fvnhg@mail.gmail.com

...and the discussion which followed.

Thanks for the link.

Yes, it needs more work to support parallelism even for 

queries that involved in write operations like INSERT,

DELETE and UPDATE commands.