51.64. pg_user_mapping
  The catalog
  
   pg_user_mapping
  
  stores
   the mappings from local user to remote.  Access to this catalog is
   restricted from normal users, use the view
  
   
    pg_user_mappings
   
  
  instead.
 
   
    Table 51.65. 
    
     pg_user_mapping
    
    Columns
   
  
| Name | Type | References | Description | 
|---|---|---|---|
| 
        oid
        | 
        oid
        | Row identifier | |
| 
        umuser
        | 
        oid
        | 
        
          | OID of the local role being mapped, 0 if the user mapping is public | 
| 
        umserver
        | 
        oid
        | 
        
          | The OID of the foreign server that contains this mapping | 
| 
        umoptions
        | 
        text[]
        | User mapping specific options, as " keyword=value " strings |