foreign_data_wrappers
   The view foreign_data_wrappers contains all
   foreign-data wrappers defined in the current database.  Only those
   foreign-data wrappers are shown that the current user has access to
   (by way of being the owner or having some privilege).
  
Table 36.25. foreign_data_wrappers Columns
| Name | Data Type | Description | 
|---|---|---|
| foreign_data_wrapper_catalog | sql_identifier | Name of the database that contains the foreign-data wrapper (always the current database) | 
| foreign_data_wrapper_name | sql_identifier | Name of the foreign-data wrapper | 
| authorization_identifier | sql_identifier | Name of the owner of the foreign server | 
| library_name | character_data | File name of the library that implementing this foreign-data wrapper | 
| foreign_data_wrapper_language | character_data | Language used to implement this foreign-data wrapper |