user_mappings
   The view user_mappings contains all user
   mappings defined in the current database.  Only those user mappings
   are shown where the current user has access to the corresponding
   foreign server (by way of being the owner or having some
   privilege).
  
표 36.56. user_mappings Columns
| Column Type Description | 
|---|
| 
        
       Name of the user being mapped,
       or  | 
| 
        Name of the database that the foreign server used by this mapping is defined in (always the current database) | 
| 
        Name of the foreign server used by this mapping |