From 4b224011751d1d4a300a0a179fc006658c6868a3 Mon Sep 17 00:00:00 2001 From: Bruce Momjian <bruce@momjian.us> Date: Wed, 3 Sep 2014 14:32:57 -0400 Subject: [PATCH] Document use of partial indexes for partial unique constraints MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Report by Tomáš Greif Backpatch through 9.4 --- doc/src/sgml/ddl.sgml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml index 0fcd9f87062..c07f5a203dd 100644 --- a/doc/src/sgml/ddl.sgml +++ b/doc/src/sgml/ddl.sgml @@ -546,7 +546,9 @@ CREATE TABLE products ( <para> Adding a unique constraint will automatically create a unique btree - index on the column or group of columns used in the constraint. + index on the column or group of columns used in the constraint. + A uniqueness constraint on only some rows can be enforced by creating + a <link linkend="indexes-partial">partial index</link>. </para> <indexterm> -- GitLab