Horton

Re: First draft of PG 17 release notes

Bruce Momjian <bruce@momjian.us>

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From: Bruce Momjian <bruce@momjian.us>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2024-09-13T22:25:41Z
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 support for ALTER TABLE ... MERGE/SPLIT PARTITION(S) commands

  2. When creating materialized views, use REFRESH to load data.

  3. Revert temporal primary keys and foreign keys

  4. Avoid needless large memcpys in libpq socket writing

  5. Enhance nbtree ScalarArrayOp execution.

  6. Introduce a non-recursive JSON parser

  7. Combine freezing and pruning steps in VACUUM

  8. Allow SIGINT to cancel psql database reconnections.

  9. Provide API for streaming relation data.

  10. Add hash support functions and hash opclass for contrib/ltree.

  11. Pull up ANY-SUBLINK with the necessary lateral support.

  12. Read WAL directly from WAL buffers.

  13. Introduce the dynamic shared memory registry.

  14. Add macros for looping through a List without a ListCell.

  15. Support +/- infinity in the interval data type.

  16. Extend ALTER OPERATOR to allow setting more optimization attributes.

  17. Consider cheap startup paths in add_paths_to_append_rel

Attachments

On Wed, Sep 11, 2024 at 07:50:40PM +0200, Álvaro Herrera wrote:
> Hello,
> 
> I noticed that these two items in the current notes are separate:
> 
> <!--
> Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
> 2024-03-25 [374c7a229] Allow specifying an access method for partitioned tables
> Author: Alvaro Herrera <alvherre@alvh.no-ip.org>
> 2024-03-28 [e2395cdbe] ALTER TABLE: rework determination of access method ID
> -->
> 
>      <listitem>
>       <para>
>       Allow specification of partitioned <link linkend="tableam">table
>       access methods</link> (Justin Pryzby, Soumyadeep Chakraborty,
>       Michael Paquier)
>       </para>
>      </listitem>
> 
> <!--
> Author: Michael Paquier <michael@paquier.xyz>
> 2024-03-08 [d61a6cad6] Add support for DEFAULT in ALTER TABLE .. SET ACCESS MET
> -->
> 
>      <listitem>
>       <para>
>       Add <literal>DEFAULT</literal> setting for <literal>ALTER TABLE
>       .. SET ACCESS METHOD</literal> (Michael Paquier)
>       </para>
>      </listitem>
> 
> They are very very closely related, so I suggest they should be
> together as a single item.  Also, the first one is somewhat strangely
> worded IMO (we don't have "partitioned table access methods" -- rather,
> we have table access methods for partitioned tables).  Maybe something
> like

Yes, agree, the wording needs improvement, patch attached.

> * Improve ALTER TABLE ... SET ACCESS METHOD
> 
>   This command can now also be applied to partitioned tables, so that it
>   can <link to "https://www.postgresql.org/docs/17/sql-altertable.html#SQL-ALTERTABLE-DESC-SET-ACCESS-METHOD">
>   influence partitions created later</link>. (Justin, Soumyadeep, Michaël)
> 
>   In addition, it now accepts the value DEFAULT to reset a previously
>   set value. (Michaël)

I moved the two items next to each other, but I am concerned combining
the partition feature with the DEFAULT features is just making it too
complicated to understand.

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

  When a patient asks the doctor, "Am I going to die?", he means 
  "Am I going to die soon?"