Horton

Re: PG 16 draft release notes ready

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: Ian Lawrence Barwick <barwick@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2023-05-21T15:52:34Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Revert MAINTAIN privilege and pg_maintain predefined role.

  2. doc: PG 16 relnotes, remove "Have initdb use ICU by default"

  3. initdb: change default --locale-provider back to libc.

  4. doc: PG 16 relnotes, add author

  5. doc: PG 16 relnotes, move memory item and reword OUTER item

  6. doc: PG 16 relnotes, add memory overhead reduction item

  7. doc: PG 16 relnotes, adjust subscription origin mention

  8. doc: PG 16 relnotes, adjust auto_explain logging item

  9. doc: PG 16 relnotes: adjust outer/full hash join parallelization

  10. doc: PG 16 relnotes, fix duplicate author and commit

  11. doc: PG 16 relnotes, fix "locale" typo and windows locale text

  12. doc: PG 16 relnotes, add author from previous merge

  13. doc: PG 16 relnotes, wording adjustments

  14. doc: PG 16 relnotes, merge and move vector items

  15. doc: PG 16 relnotes, update xid/subxid searches item

  16. doc: PG 16 relnotes, SIMD improvements

  17. doc: PG 16 relnotes, add major features list

  18. doc: PG 16 relnotes, misc merged items and bootstrap detail

  19. doc: PG 16 relnotes, misc. updates

  20. doc: PG 16 relnotes, add commits

  21. Allow logical decoding on standbys

  22. Fix ts_headline() edge cases for empty query and empty search text.

  23. Add a hook for modifying the ldapbind password

  24. Rework design of functions in pg_walinspect

  25. initdb: derive encoding from locale for ICU; similar to libc.

  26. Doc: add XML ID attributes to <sectN> and <varlistentry> tags.

  27. Simplify the implementations of the to_reg* functions.

  28. Rename pg_dissect_walfile_name() to pg_split_walfile_name()

  29. Make materialized views participate in predicate locking

  30. Improve performance of and reduce overheads of memory management

  31. Allow grant-level control of role inheritance behavior.

On Sun, May 21, 2023 at 09:30:01PM +0900, Ian Lawrence Barwick wrote:
> 2023年5月19日(金) 5:49 Bruce Momjian <bruce@momjian.us>:
> >
> > I have completed the first draft of the PG 16 release notes.  You can
> > see the output here:
> >
> >         https://momjian.us/pgsql_docs/release-16.html
> >
> > I will adjust it to the feedback I receive;  that URL will quickly show
> > all updates.
> 
> Hi
> 
> Below are a few commits which are not referenced in the current iteration
> of the release notes, but which seem worthy of inclusion.
> Apologies if they have been previously discussed, or I'm overlooking something
> obvious.
> 
> d09dbeb9b Speedup hash index builds by skipping needless binary searches
>   "Testing has shown that this can improve hash index build speeds by 5-15%
>    with a unique set of integer values."
> 
> e09d7a126 Improve speed of hash index build.
>   "This seems to be good for overall
>   speedup of 5%-9%, depending on the incoming data."

For the above two items, I mention items that would change user behavior
like new features or changes that are significant enough that they would
change user behavior.  For example, if a new join method increases
performance by 5x, that could change user behavior.  Based on the quoted
numbers above, I didn't think "hash now faster" would be appropriate to
mention.  Right?

> 594f8d377 Allow batching of inserts during cross-partition updates.
>   seems reasonable to mention this as it's related to 97da48246, which
>   is mentioned in the notes

I wasn't sure if that was significant, based on the above logic, but
97da48246 has a user API to control it so I mentioned that one.

> 1349d2790 Improve performance of ORDER BY / DISTINCT aggregates
>   This is the basis for da5800d5, which is mentioned in the notes, but AFAICS
>    the latter is an implementation fix for the former (haven't looked
> into either
>    in detail though).

I have added this commit to the existing entry, thanks.

> The following are probably not headline features, but are the kind of
> behavioural
> changes I'd expect to find in the release notes (when, at some point
> in the far and
> distant future, trying to work out when they were introduced when considering
> application compatibility etc.):
> 
> 13a185f54 Allow publications with schema and table of the same schema.

This seemed like a rare enough case that I did not add it.

> 2ceea5adb Accept "+infinity" in date and timestamp[tz] input.

I have this but didn't add that commit, added.

> d540a02a7 Display the leader apply worker's PID for parallel apply workers.

Parallelism of apply is a new feature and I don't normally mention
output _additions_ that are related to new features.

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

  Only you can decide what is important to you.