45.19. pg_foreign_data_wrapper

The catalog 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.

Table 45-19. pg_foreign_data_wrapper Columns

NameTypeReferencesDescription
fdwnamename Name of the foreign-data wrapper
fdwowneroidpg_authid.oidOwner of the foreign-data wrapper
fdwvalidatoroidpg_proc.oid References a validator function that is responsible for checking the validity of the generic options given to the foreign-data wrapper, as well as to foreign servers and user mappings using the foreign-data wrapper. Zero if no validator is provided.
fdwaclaclitem[]  Access privileges; see GRANT and REVOKE for details
fdwoptionstext[]  Foreign-data wrapper specific options, as "keyword=value" strings