pg_event_trigger
   The catalog pg_event_trigger stores event triggers.
   See Chapter 41 for more information.
  
Table 53.21. 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.  |