55.21. pg_event_trigger
 The catalog pg_event_trigger stores event triggers. See Chapter 42 for more information. 
Table 55.21. pg_event_trigger Columns
Column Type Description  | 
|---|
 Row identifier  | 
 Trigger name (must be unique)  | 
 Identifies the event for which this trigger fires  | 
 Owner of the event trigger  | 
 The function to be called  | 
  Controls in which session_replication_role modes the event trigger fires.   | 
 Command tags for which this trigger will fire. If NULL, the firing of this trigger is not restricted on the basis of the command tag.  |