Horton

Re: Postgres 11 release notes

Bruce Momjian <bruce@momjian.us>

View thread View on postgr.es
From: Bruce Momjian <bruce@momjian.us>
To: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
Cc: Peter Geoghegan <pg@bowt.ie>, Teodor Sigaev <teodor@sigaev.ru>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2018-05-14T20:37:42Z
Lists: pgsql-hackers 
On Mon, May 14, 2018 at 07:47:54AM -0400, Andrew Dunstan wrote:
> 
> 
> On 05/12/2018 08:47 PM, Bruce Momjian wrote:
> > On Sat, May 12, 2018 at 01:22:55PM -0700, Peter Geoghegan wrote:
> >> On Fri, May 11, 2018 at 2:06 PM, Bruce Momjian <bruce@momjian.us> wrote:
> >>> Done and URL updated.
> >> I have some feedback on "Allow NOT NULL to be added to columns without
> >> requiring a table rewrite". I suggest that this be phrased as "Avoid a
> >> table rewrite when ALTER TABLE ADD COLUMN sets a default value for a
> >> column". Referencing the fact that Postgres was previously able to do
> >> this with a NULL default doesn't seem to add anything.
> > Agreed, done:
> >
> >         Allow <command>ALTER TABLE</command> to add a non-null default
> >         column without a table rewrite (Andrew Dunstan, Serge Rielau)
> >
> 
> 
> I think "a column with a non-null default" would be a bit clearer than
> "a non-null default column".

Yeah, I didn't like what I had either, so I changed it to what you
suggested, though it gives us an odd "with X, without Y" pattern:

        Allow <command>ALTER TABLE</command> to add a column with
        a non-null default without a table rewrite (Andrew Dunstan,
        Serge Rielau)

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +

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.