From 6126d3e70bc155e74e3ce8dfcbfecb502469528f Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Tue, 20 Feb 2007 00:25:05 +0000
Subject: [PATCH] Document IS [NOT] OF, which was added in 7.3.
---
doc/src/sgml/func.sgml | 18 +++++++++++++++++-
doc/src/sgml/syntax.sgml | 5 +++--
2 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 2f4e4d165d8..45b70621d7a 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.365 2007/02/19 22:51:44 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.366 2007/02/20 00:25:05 momjian Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@@ -411,6 +411,22 @@
<literal>IS NOT NULL</literal>, respectively, except that the input
expression must be of Boolean type.
</para>
+
+ <para>
+ <indexterm>
+ <primary>IS OF</primary>
+ </indexterm>
+ <indexterm>
+ <primary>IS NOT OF</primary>
+ </indexterm>
+ It is possible to check the data type of an expression using the
+ constructs
+<synopsis>
+<replaceable>expression</replaceable> IS OF (typename, ...)
+<replaceable>expression</replaceable> IS NOT OF (typename, ...)
+</synopsis>
+ They return a boolean value based on whether the expression's data
+ type is one of the listed data types.
</sect1>
<sect1 id="functions-math">
diff --git a/doc/src/sgml/syntax.sgml b/doc/src/sgml/syntax.sgml
index ad702f63263..a9bd06a03ee 100644
--- a/doc/src/sgml/syntax.sgml
+++ b/doc/src/sgml/syntax.sgml
@@ -1,4 +1,4 @@
-<!-- $PostgreSQL: pgsql/doc/src/sgml/syntax.sgml,v 1.115 2007/02/06 09:16:07 petere Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/syntax.sgml,v 1.116 2007/02/20 00:25:05 momjian Exp $ -->
<chapter id="sql-syntax">
<title>SQL Syntax</title>
@@ -847,7 +847,8 @@ SELECT (5 !) - 6;
<row>
<entry><token>IS</token></entry>
<entry></entry>
- <entry><literal>IS TRUE</>, <literal>IS FALSE</>, <literal>IS UNKNOWN</>, <literal>IS NULL</></entry>
+ <entry><literal>IS TRUE</>, <literal>IS FALSE</>, <literal>IS
+ UNKNOWN</>, <literal>IS NULL</>, <literal>IS OF</></entry>
</row>
<row>
--
GitLab