55.25. pg_foreign_table
 The catalog pg_foreign_table contains auxiliary information about foreign tables. A foreign table is primarily represented by a pg_class entry, just like a regular table. Its pg_foreign_table entry contains the information that is pertinent only to foreign tables and not any other kind of relation. 
Table 55.25. pg_foreign_table Columns
Column Type Description  | 
|---|
  The OID of the   | 
 OID of the foreign server for this foreign table  | 
 Foreign table options, as “keyword=value” strings  |