<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.10 2010/03/2302:28:48 momjian Exp $ -->

<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.11 2010/03/2322:37:14 momjian Exp $ -->

<sect1 id="release-9-0">

linkend="SQL-CREATETABLE-description"><command>CREATE

TABLE CONSTRAINT ... EXCLUDE</></link> clause. While

uniqueness checks could be specified using this syntax,

the real value of thisfeatures is in using complex

the real value of thisfeature is in using complex

operators that do not have built-in constraints.

</para>

</listitem>