From aa976d3b9004bd2c275e4ad17fa897ce5fe5127e Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Mon, 11 May 2020 21:24:08 -0400
Subject: [PATCH] doc:  PG 13 relnotes:  add duplicate btree optimization
 details

---
 doc/src/sgml/release-13.sgml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/src/sgml/release-13.sgml b/doc/src/sgml/release-13.sgml
index 102b8366c5..83470e9ba1 100644
--- a/doc/src/sgml/release-13.sgml
+++ b/doc/src/sgml/release-13.sgml
@@ -359,9 +359,9 @@ More efficiently store duplicates in btree indexes (Anastasia Lubennikova, Peter
 </para>
 
 <para>
-This allows efficient btree indexing of low cardinality columns.
-Users upgrading with pg_upgrade will need to use REINDEX to make use of
-this feature.
+This allows efficient btree indexing of low cardinality columns by storing
+duplicate keys only once.  Users upgrading with pg_upgrade will need to
+use REINDEX to make use of this feature.
 </para>
 
 </listitem>