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
1 month ago · 7ddfac79f2
parent 3b7140d27e
commit 7ddfac79f2
1 changed files with 2 additions and 1 deletions
--- 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>