Re: First draft of the PG 15 release notes

On Sat, May 14, 2022 at 12:42 AM Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> On Fri, May 13, 2022 at 10:48:41AM +0900, Amit Langote wrote:
> > Btw, perhaps the following should be listed under E.1.3.2.1. Logical
> > Replication, not E.1.3.1.1. Partitioning?
> >
> > <!--
> > Author: Amit Kapila <akapila(at)postgresql(dot)org>
> > 2021-12-08 [a61bff2bf] De-duplicate the result of pg_publication_tables view.
> > -->
> >
> > <listitem>
> > <para>
> > Remove incorrect duplicate partitions in system view
> > pg_publication_tables (Hou Zhijie)
> > </para>
> > </listitem>
> >
> > Attached a patch to do so.
>
> Agreed, done.

Thank you.

Though a bit late given beta is now wrapped, I have another partition
item wording improvement suggestion:

-Previously, a partitioned table with any LIST partition containing
multiple values could not be used for ordered partition scans. Now
only non-pruned LIST partitions are checked. This also helps with
-partitioned tables with DEFAULT partitions.

+Previously, an ordered partition scan would not be considered for a
LIST-partitioned table with any partition containing multiple values,
nor for partitioned tables with DEFAULT partition.

I think the "Now only non-pruned LIST partitions are checked" bit in
the original wording is really an implementation detail of the actual
improvement that ordered partition scans are now possible in more
cases -- it simply became easier for the code that implements this
optimization to refer to non-pruned partitions, using a bitmapset
rather than having to trawl through the whole array of partition rels,
which is what I think the commit message of this item mentions. David
can correct me if I got that wrong.

Attached a patch.

--
Thanks, Amit Langote
EDB: http://www.enterprisedb.com