doc PG 18 relnotes: clarify btree skip scan item

Reported-by: Peter Geoghegan
Discussion: https://postgr.es/m/CAH2-Wz=2CWXgO1+uyR-VfN3ALMtFnfTtXK-VtkoQQ89ogm=4sg@mail.gmail.com

diff --git a/doc/src/sgml/release-18.sgml b/doc/src/sgml/release-18.sgml
index 2a52cef1c7ce1f64d4ac99243c2814404c0d56fc..a2b1921fbbbbd42274125a00fdfcaeea9c878617 100644 (file)
--- a/doc/src/sgml/release-18.sgml
+++ b/doc/src/sgml/release-18.sgml
@@ -469,7 +469,8 @@ Allow skip scans of btree indexes (Peter Geoghegan)
 </para>
 
 <para>
-This is effective if the earlier non-referenced columns contain few unique values.
+This allows muti-column btree indexes to be used by queries that only
+reference the second or later indexed columns.
 </para>
 </listitem>