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/[email protected]

Reviewed-by: David Rowley
Backpatch-through: master

diff --git a/doc/src/sgml/release-17.sgml b/doc/src/sgml/release-17.sgml
index 38c14970822c80815e52a2d6a47013eb4dc83fff..fa0a703629c08f8a2202362979d2c33a05f2fcba 100644 (file)
--- a/doc/src/sgml/release-17.sgml
+++ b/doc/src/sgml/release-17.sgml
@@ -356,6 +356,28 @@ Improve optimization of range values when using containment operators <@ and
 
 
 
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+Allow correlated IN subqueries to be transformed into joins (Andy Fan, Tom Lane)
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+Improve optimization of the LIMIT clause on partitioned tables, inheritance parents, and UNION ALL queries (Andy Fan, David Rowley)
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