diff --git a/doc/src/sgml/ref/set.sgml b/doc/src/sgml/ref/set.sgml
index 172151eddd..84dfa32035 100644
--- a/doc/src/sgml/ref/set.sgml
+++ b/doc/src/sgml/ref/set.sgml
@@ -1,5 +1,5 @@
@@ -266,12 +266,14 @@ SELECT setseed(value);
- CONSTRAINT
+ CONSTRAINTS
- 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:
+
constraintlist
@@ -295,12 +297,19 @@ SELECT setseed(value);
- In mode, foreign key constraints
- marked as are checked only at
- transaction commit.
In mode, foreign key constraints
are checked at the end of each query.
+
+
+ In mode, foreign key constraints
+ marked as are checked only at
+ transaction commit or until its mode is explicitly set to
+ .
+ This is actually only done for foreign key
+ constraints, so it does not apply to UNIQUE or other
+ constraints.
+