From 7f85cac04a4d379b30096c363ab6ebf2727cb883 Mon Sep 17 00:00:00 2001
From: "Thomas G. Lockhart" <lockhart@fourpalms.org>
Date: Tue, 18 Apr 2000 15:23:34 +0000
Subject: [PATCH] Clean up description of SET CONSTRAINTS.
---
doc/src/sgml/ref/set.sgml | 25 +++++++++++++++++--------
1 file changed, 17 insertions(+), 8 deletions(-)
diff --git a/doc/src/sgml/ref/set.sgml b/doc/src/sgml/ref/set.sgml
index 172151eddd3..84dfa32035a 100644
--- a/doc/src/sgml/ref/set.sgml
+++ b/doc/src/sgml/ref/set.sgml
@@ -1,5 +1,5 @@
<!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/set.sgml,v 1.41 2000/04/14 23:12:29 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/set.sgml,v 1.42 2000/04/18 15:23:34 thomas Exp $
Postgres documentation
-->
@@ -266,12 +266,14 @@ SELECT setseed(<replaceable>value</replaceable>);
</varlistentry>
<varlistentry>
- <term>CONSTRAINT</term>
+ <term>CONSTRAINTS</term>
<listitem>
<para>
- SET CONSTRAINTS controls the frequency of foreign key
- constratint checking in the current transaction. Allowed
- parameters are:
+ SET CONSTRAINTS affects the behavior of constraint evaluation
+ in the current transaction.
+ SET CONSTRAINTS, specified
+ in SQL3, has these allowed parameters:
+
<variablelist>
<varlistentry>
<term><replaceable class="parameter">constraintlist</replaceable></term>
@@ -295,12 +297,19 @@ SELECT setseed(<replaceable>value</replaceable>);
</para>
<para>
- In <option>DEFERRED</option> mode, foreign key constraints
- marked as <option>DEFERRABLE</option> are checked only at
- transaction commit.
In <option>IMMEDIATE</option> mode, foreign key constraints
are checked at the end of each query.
</para>
+
+ <para>
+ In <option>DEFERRED</option> mode, foreign key constraints
+ marked as <option>DEFERRABLE</option> are checked only at
+ transaction commit or until its mode is explicitly set to
+ <option>IMMEDIATE</option>.
+ This is actually only done for foreign key
+ constraints, so it does not apply to UNIQUE or other
+ constraints.
+ </para>
</listitem>
</varlistentry>
--
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