pg_foreign_data_wrapper stores foreign-data wrapper definitions. A foreign-data wrapper is the mechanism by which external data, residing on foreign servers, is accessed.
Name of the foreign-data wrapper
Owner of the foreign-data wrapper
References a handler function that is responsible for supplying execution routines for the foreign-data wrapper. Zero if no handler is provided
References a validator function that is responsible for checking the validity of the options given to the foreign-data wrapper, as well as options for foreign servers and user mappings using the foreign-data wrapper. Zero if no validator is provided
Access privileges; see Section 5.7 for details
Foreign-data wrapper specific options, as “keyword=value” strings