pg_event_trigger   The catalog pg_event_trigger stores event triggers.
   See Chapter 39 for more information.
  
Table 51.21. pg_event_trigger Columns
| Name | Type | References | Description | 
|---|---|---|---|
| evtname | name | Trigger name (must be unique) | |
| evtevent | name | Identifies the event for which this trigger fires | |
| evtowner | oid |  | Owner of the event trigger | 
| evtfoid | oid |  | The function to be called | 
| evtenabled | char | Controls in which session_replication_role modes
       the event trigger fires. O= trigger fires in “origin” and “local” modes,D= trigger is disabled,R= trigger fires in “replica” mode,A= trigger fires always. | |
| evttags | text[] | 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. |