Re: PostgreSQL 16 release announcement draft

Jonathan S. Katz <jkatz@postgresql.org>

From: "Jonathan S. Katz" <jkatz@postgresql.org>
To: David Rowley <dgrowleyml@gmail.com>
Cc: jian he <jian.universality@gmail.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, chelseadole@gmail.com
Date: 2023-08-24T14:32:02Z
Lists: pgsql-hackers

Attachments

On 8/23/23 5:07 PM, David Rowley wrote:
> On Thu, 24 Aug 2023 at 05:55, Jonathan S. Katz <jkatz@postgresql.org> wrote:
>> We could add something about 1349d2790 -- do you have suggested wording?
> 
> I think it's worth a mention. See the text added in square brackets below:
> 
> PostgreSQL 16 improves the performance of existing PostgreSQL functionality
> through new query planner optimizations. In this latest release, the query
> planner can parallelize  `FULL` and `RIGHT` joins, [generate more
> optimal plans for
> queries containing aggregate functions with a `DISTINCT` or `ORDER BY` clause,]
> utilize incremental sorts for `SELECT DISTINCT` queries, and optimize
> window function
> executions so they execute more efficiently. It also introduces
> `RIGHT` and `OUTER`
> "anti-joins", which enable users to identify rows not present in a joined table.

I added this in mostly verbatim. I'm concerned the sentence is a bit 
long, but we could break it up into two: (1) with the new JOIN 
capabilities and (2) with the optimizations.

Jonathan

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →
  1. Support "Right Anti Join" plan shapes.

  2. Improve performance of ORDER BY / DISTINCT aggregates