CREATE CONSTRAINT TRIGGER() SQL Commands CREATE CONSTRAINT TRIGGER()NAME
CREATE CONSTRAINT TRIGGER - define a new constraint trigger
SYNOPSIS
CREATE CONSTRAINT TRIGGER name
AFTER event [ OR ... ]
ON table_name
[ FROM referenced_table_name ]
{ NOT DEFERRABLE | [ DEFERRABLE ] { INITIALLY IMMEDIATE | INITIALLY DEFERRED } }
FOR EACH ROW
EXECUTE PROCEDURE funcname ( arguments )
DESCRIPTION
CREATE CONSTRAINT TRIGGER is used within CREATE TABLE/ALTER TABLE and
by pg_dump to create the special triggers for referential integrity.
It is not intended for general use.
PARAMETERS
name The name of the constraint trigger. The actual name of the cre‐
ated trigger will be of the form RI_ConstraintTrigger_0000
(where 0000 is some number assigned by the server). Use this
assigned name when dropping the trigger.
event One of INSERT, UPDATE, or DELETE; this specifies the event that
will fire the trigger. Multiple events can be specified using
OR.
table_name
The (possibly schema-qualified) name of the table in which the
triggering events occur.
referenced_table_name
The (possibly schema-qualified) name of the table referenced by
the constraint. Used by foreign key constraints triggers.
DEFERRABLE
NOT DEFERRABLE
INITIALLY IMMEDIATE
INITIALLY DEFERRED
See the CREATE TABLE [create_table(5)] documentation for details
of these constraint options.
funcname(args)
The function to call as part of the trigger processing. See CRE‐
ATE TRIGGER [create_trigger(5)] for details.
COMPATIBILITY
CREATE CONTRAINT TRIGGER is a PostgreSQL extension of the SQL standard.
SQL - Language Statements 2008-01-03 CREATE CONSTRAINT TRIGGER()