Trigger Modes (IDS)

You can set a trigger mode to enable or disable a trigger when you create it.

Trigger Modes
 
   .-ENABLED--.
>>-+-DISABLED-+------------------------------------------------><
 

You can create triggers on tables or on views in ENABLED or DISABLED mode.

• When a trigger is created in ENABLED mode, the database server executes the trigger action when the trigger event is encountered. (If you specify no mode when you create a trigger, ENABLED is the default mode.)
• When a trigger is created in DISABLED mode, the trigger event does not cause execution of the trigger action. In effect, the database server ignores the trigger and its action, even though the systriggers system catalog table maintains information about the disabled trigger.

You can also use the SET TRIGGERS option of the Database Object Mode statement to set an existing trigger to the ENABLED or DISABLED mode.

After a DISABLED trigger is enabled by the SET TRIGGERS statement, the database server can execute the trigger action when the trigger event is encountered, but the trigger does not perform retroactively. The database server does not attempt to execute the trigger for rows that were selected, inserted, deleted, or updated while the trigger was disabled and before it was enabled.