-<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.366 2007/02/20 00:25:05 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.367 2007/02/20 14:04:50 momjian Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
expression must be of Boolean type.
</para>
+<!-- IS OF does not conform to the ISO SQL behavior, so it is undocumented here
<para>
<indexterm>
<primary>IS OF</primary>
</synopsis>
They return a boolean value based on whether the expression's data
type is one of the listed data types.
+ </para>
+-->
+
</sect1>
<sect1 id="functions-math">
-<!-- $PostgreSQL: pgsql/doc/src/sgml/syntax.sgml,v 1.116 2007/02/20 00:25:05 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/syntax.sgml,v 1.117 2007/02/20 14:04:50 momjian Exp $ -->
<chapter id="sql-syntax">
<title>SQL Syntax</title>
<row>
<entry><token>IS</token></entry>
<entry></entry>
- <entry><literal>IS TRUE</>, <literal>IS FALSE</>, <literal>IS
- UNKNOWN</>, <literal>IS NULL</>, <literal>IS OF</></entry>
+ <entry><literal>IS TRUE</>, <literal>IS FALSE</>, <literal>IS UNKNOWN</>, <literal>IS NULL</></entry>
</row>
<row>