From 9de3f2843c4cf695a37d04d268df350b6118a232 Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Wed, 19 Jan 2011 21:21:33 -0500
Subject: [PATCH] Document that WITH queries are also called Common Table
Expressions.
Peter Geoghegan, reviewed by Stephen Frost
---
doc/src/sgml/acronyms.sgml | 9 +++++++++
doc/src/sgml/queries.sgml | 5 +++--
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/doc/src/sgml/acronyms.sgml b/doc/src/sgml/acronyms.sgml
index 64efd32395..0e2b1bcc35 100644
--- a/doc/src/sgml/acronyms.sgml
+++ b/doc/src/sgml/acronyms.sgml
@@ -98,6 +98,15 @@
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><acronym>CTE</acronym></term>
+ <listitem>
+ <para>
+ <link linkend="queries-with">Common Table Expression</link>
+ </para>
+ </listitem>
+ </varlistentry>
+
<varlistentry>
<term><acronym>CVE</acronym></term>
<listitem>
diff --git a/doc/src/sgml/queries.sgml b/doc/src/sgml/queries.sgml
index 21a3a8d1a6..e54de756dc 100644
--- a/doc/src/sgml/queries.sgml
+++ b/doc/src/sgml/queries.sgml
@@ -1526,7 +1526,7 @@ SELECT <replaceable>select_list</replaceable> FROM <replaceable>table_expression
<sect1 id="queries-with">
- <title><literal>WITH</literal> Queries</title>
+ <title><literal>WITH</literal> Queries (Common Table Expressions)</title>
<indexterm zone="queries-with">
<primary>WITH</primary>
@@ -1540,7 +1540,8 @@ SELECT <replaceable>select_list</replaceable> FROM <replaceable>table_expression
<para>
<literal>WITH</> provides a way to write subqueries for use in a larger
- <literal>SELECT</> query. The subqueries can be thought of as defining
+ <literal>SELECT</> query. The subqueries, which are often referred to as Common Table
+ Expressions or <acronym>CTE</acronym>s, can be thought of as defining
temporary tables that exist just for this query. One use of this feature
is to break down complicated queries into simpler parts. An example is: