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doc PG 17 relnotes: add two optimizer items 

One is about subqueries becoming joins and the other is about optimizing
LIMIT by improving startup cost.

Reported-by: Andy Fan

Discussion: https://postgr.es/m/87h6f4ncc6.fsf@163.com

Reviewed-by: David Rowley

Backpatch-through: master
This commit is contained in:
Bruce Momjian 2024-05-14 20:36:36 -04:00
parent f535f350c1
commit 1a48f8b40d
1 changed files with 22 additions and 0 deletions
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doc/src/sgml/release-17.sgml
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@ -356,6 +356,28 @@ Improve optimization of range values when using containment operators <@ and
</para>
</listitem>
<!--
Author: Alexander Korotkov <akorotkov@postgresql.org>
2024-02-15 [9f1337639] Pull up ANY-SUBLINK with the necessary lateral support.
-->
<listitem>
<para>
Allow correlated IN subqueries to be transformed into joins (Andy Fan, Tom Lane)
</para>
</listitem>
<!--
Author: David Rowley <drowley@postgresql.org>
2023-10-05 [a8a968a82] Consider cheap startup paths in add_paths_to_append_rel
-->
<listitem>
<para>
Improve optimization of the LIMIT clause on partitioned tables, inheritance parents, and UNION ALL queries (Andy Fan, David Rowley)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
2023-07-14 [e08d74ca1] Allow plan nodes with initPlans to be considered paralle