redhat man page for create_constraint_trigger

CREATE CONSTRAINT 
TRIGGER(7)					   SQL Commands 				      CREATE CONSTRAINT TRIGGER(7)

NAME
       CREATE CONSTRAINT TRIGGER - define a new constraint trigger

SYNOPSIS
       CREATE CONSTRAINT TRIGGER name
	   AFTER events ON
	   relation constraint attributes
	   FOR EACH ROW EXECUTE PROCEDURE func '(' args ')'

   INPUTS
       name   The name of the constraint trigger.

       events The event categories for which this trigger should be fired.

       relation
	      The name (possibly schema-qualified) of the relation in which the triggering events occur.

       constraint
	      Actual constraint specification.

       attributes
	      Constraint attributes.

       func(args)
	      Function to call as part of the trigger processing.

   OUTPUTS
       CREATE TRIGGER
	      Message returned if successful.

DESCRIPTION
       CREATE CONSTRAINT TRIGGER is used within CREATE/ALTER TABLE and by pg_dump to create the special triggers for referential integrity.

       It is not intended for general use.

SQL - Language Statements					    2002-11-22					      CREATE CONSTRAINT TRIGGER(7)