Re: PG 16 draft release notes ready

On Tue, May 23, 2023 at 11:54:30PM -0400, Bruce Momjian wrote:
> On Wed, May 24, 2023 at 08:37:45AM +1200, David Rowley wrote:
> > On Mon, 22 May 2023 at 07:05, Jonathan S. Katz <jkatz@postgresql.org> wrote:
> > > * Parallel execution of queries that use `FULL` and `OUTER` joins
> > 
> > I think this should be `RIGHT` joins rather than `OUTER` joins.
> > 
> > LEFT joins have been parallelizable I think for a long time now.
> 
> Well, since we can swap left/right easily, why would we not have just
> have swappted the tables and done the join in the past?  I think there
> are two things missing in my description.
> 
> First, I need to mention parallel _hash_ join.  Second, I think this
> item is saying that the _inner_ side of a parallel hash join can be an
> OUTER or FULL join.  How about?
> 
>     Allow hash joins to be parallelized where the inner side is
>     processed as an OUTER or FULL join (Melanie Plageman, Thomas Munro)
> 
> In this case, the inner side is the hashed side.

I went with this text:

    Allow parallelization of FULL and internal right OUTER hash joins
    (Melanie Plageman, Thomas Munro)

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  Only you can decide what is important to you.