Defining PostgreSQL Table Triggers

The following properties are applicable to a PostgreSQL Table Trigger object.

Tab	Property	Description	Additional Properties
	Name	Specifies the name of the trigger
	Insert	Specifies whether the trigger is executed on INSERT
	Update	Specifies whether the trigger is executed on UPDATE
	Delete	Specifies whether the trigger is executed on DELETE
	Truncate	Specifies whether the trigger is executed on TRUNCATE
	Fire	Specifies when the table trigger is executed	After: Indicates that the trigger is executed after the occurrence of the trigger event Before: Indicates that the trigger is executed before the occurrence of the trigger event Instead Of: Specifies an alternative action to take in place of a standard operation (such as INSERT, UPDATE, or DELETE) on a view
	Replace	Select this check box if you want the trigger DDL that is generated during Forward Engineering to replace any occurrence of an identically named trigger
	Generate	Specifies whether a DDL statement is generated for the table trigger during forward engineering
General	Constraint Trigger	Indicates that the trigger is a constraint trigger. You can adjust the timing of trigger firing by setting constraints.
	Referenced Table Name	Specifies the name of another table that the constraint references
	Deferrable	Indicates whether the constraint can be deferred	Deferrable: Indicates whether the constraint can be deferred Not Deferrable: Indicates whether the constraint cannot be deferred
	Immediate Deferred Type	Specifies the default time to check the constraint	Initially Immediate: Specifies the default time to check the constraint in case of an immediate constraint. It checks after each statement. Initially Deferred: Specifies the default time to check the constraint in case of a deferrable constraint. It is checked only at the end of the transaction
	Old Table	Specifies the name of the old table
	New Table	Specifies the name for the new table
	Scope	Specifies the scope of the trigger	Statement: Indicates that the trigger fires for each qualified statement Row: Indicates that the trigger fires for each qualified row
	When Clause	Specifies the condition on when to trigger
	Execute Type	Specifies the type of event on which the trigger will be fired	Function: Indicates that the trigger calls a trigger function. Trigger functions specifically design for use with triggers and must return a type of TRIGGER. Procedure: Indicates that the trigger calls a stored procedure. Unlike functions, stored procedures manage transactions and do not necessarily return a value.
	Function	Specifies the function executed when the trigger fires, declared to take no arguments and return type trigger. Select a function from the drop-down list or click to create a new one.
Update Columns	Column	Specifies a list of columns. It indicates that the trigger fires only if the UPDATE command mentions at least one of the listed columns as a target.

Work with the other tabs in the editor to access additional design features, for example:
- Define the code type in the Code tab.
- View expanded code in the Expanded tab.
(Optional) Click the Comment tab and enter any comments you want to associate with the object.
(Optional) Click the UDP tab to work with user-defined properties for the object.
(Optional) Click the Notes tab to view and edit user notes.
Click Close.
The trigger is defined and the PostgreSQL Table Trigger Editor closes.

For more information on trigger properties, refer to PostgreSQL documentation.