From: Bruce Momjian <bruce@momjian.us> Date: Wed, 3 Sep 2014 18:34:46 +0000 (-0400) Subject: Document use of partial indexes for partial unique constraints X-Git-Tag: REL9_4_BETA3~66 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=646deb603e0846d1efd4da84df412963dda68eec;p=postgresql Document use of partial indexes for partial unique constraints Report by Tomáš Greif Backpatch through 9.4 --- diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml index 8ace8bd3a2..ceb83798c8 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>