Horton

Re: Postgres 11 release notes

Darafei Komяpa Praliaskouski <me@komzpa.net>

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From: Darafei "Komяpa" Praliaskouski <me@komzpa.net>
To: Bruce Momjian <bruce@momjian.us>
Cc: Andrey Borodin <x4mmm@yandex-team.ru>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2018-06-16T12:56:05Z
Lists: pgsql-hackers 
>
> > I'm not sure it is usefull in release notes since it is more about API,
> and not
> > user-facing change. Just in case.
> > GiST opclasses now can omit compress and decompress functions. If
> compress
> > function is omited, IndexOnlyScan is enabled for opclass without any
> extra
> > change.
> > https://github.com/postgres/postgres/commit/
> > d3a4f89d8a3e500bd7c0b7a8a8a5ce1b47859128
>
> Uh, we do have this for SP-GiST:
>
>         Allow SP-GiST indexes to optionally use compression (Teodor Sigaev,
>         Heikki Linnakangas, Alexander Korotkov, Nikita Glukhov)
>
> I am unclear how far downt the API stack I should go in documenting
> changes like this.
>

It is also a bit misleading - the idea in that change is that now index
representation can be a lossy version of actual data type (a box instead of
polygon as a referende, so a changelog entry can tell "Allow SP-GiST index
creation for polygon datatype.").  There is no "decompression" for such
thing. "compression" sounds like gzip for me in user-facing context.

Commits

  1. doc: update PG 11 release notes

  2. Fix misspelled pg_trgm contrib name in PostgreSQL 11 release notes

  3. Doc: clarify release note text about v11's new window function features.

  4. Improve wording of release notes item

  5. Fix typos in release notes

  6. Doc: preliminary list of PG11 major features.

  7. Make numeric power() handle NaNs according to the modern POSIX spec.

  8. Various improvements of skipping index scan during vacuum technics

  9. Revert back-branch changes in power()'s behavior for NaN inputs.

  10. Avoid wrong results for power() with NaN input on more platforms.

  11. Avoid wrong results for power() with NaN input on some platforms.

  12. Skip full index scan during cleanup of B-tree indexes when possible

  13. Rewrite the code that applies scan/join targets to paths.

  14. Postpone generate_gather_paths for topmost scan/join rel.

  15. Add casts from jsonb

  16. Make plpgsql use its DTYPE_REC code paths for composite-type variables.

  17. Don't allow VACUUM VERBOSE ANALYZE VERBOSE.

  18. Pass InitPlan values to workers via Gather (Merge).

  19. Account for the effect of lossy pages when costing bitmap scans.

  20. Allow no-op GiST support functions to be omitted.

  21. Rearm statement_timeout after each executed query.

  22. Push limit through subqueries to underlying sort, where possible.