Re: PostgreSQL 16 release announcement draft

jian he <jian.universality@gmail.com>

From: jian he <jian.universality@gmail.com>
To: "Jonathan S. Katz" <jkatz@postgresql.org>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, chelseadole@gmail.com
Date: 2023-08-23T10:20:49Z
Lists: pgsql-hackers
>>>
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, utilize incremental sorts for
`SELECT DISTINCT` queries, and execute window functions more efficiently. It
also introduces `RIGHT` and `OUTER` "anti-joins", which enable users to identify
rows not present in a joined table.
>>>

I think "utilize incremental sorts is for" something like select
my_avg(distinct one),my_sum(one) from (values(1),(3)) t(one);
so it's not the same as `SELECT DISTINCT` queries?
ref: https://git.postgresql.org/cgit/postgresql.git/commit/?id=1349d2790bf48a4de072931c722f39337e72055e

also
<<<< "the query planner ....., and execute window functions more efficiently."
since the query planner doesn't execute anything. probably "and
optimize window functions execution"?



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