Re: PG 18 release notes draft committed

On Tue, 6 May 2025 at 03:59, Bruce Momjian <bruce@momjian.us> wrote:
>
> On Mon, May  5, 2025 at 09:42:10PM +1200, David Rowley wrote:
> > I agree that 88f55bc97 and d69d45a5a should be in their own item.
> > Likely no need to go into detail about the speed up being about
> > "EquivalenceClass lookups". I imagine something like "Reduce planner
> > overheads when planning queries to partitioned and inheritance parent
> > tables"
> >
> > Then for bb3ec16e1, d47cbf474, cbc127917 and 525392d57, something like
> > "Defer locking of partitions during execution until after partition
> > elimination".  The release notes for 11.0 called it "partition
> > elimination", so I went with that naming.
>
> Okay, I split them up and went with the attached patch.


> +Allow partitions to be pruned more efficienty (Ashutosh Bapat, Yuya Watari, David Rowley)

I think you've misunderstood what's been changed here. Unfortunately,
it's not even true with a bit of eye squinting as these changes have
nothing to do with partition pruning. I think it would be much more
informative to state it as I suggested. Also, the spelling of
"efficiently" needs adjusted.

> +Avoid the locking of pruned partitions during planning (Amit Langote)

At the very least, you'd need to swap "planning" for "execution" as
the above statement isn't true.

David