pg_foreign_data_wrapper
The system catalog table pg_foreign_data_wrapper stores foreign-data wrapper definitions. A foreign-data wrapper is a mechanism by which you access external data residing on foreign servers.
| column | type | references | description |
|---|---|---|---|
oid | oid | The object ID | |
fdwname | name | Name of the foreign-data wrapper | |
fdwowner | oid | pg_authid.oid | Owner of the foreign-data wrapper |
fdwhandler | oid | pg_proc.oid | A reference to a handler function that is responsible for supplying execution routines for the foreign-data wrapper. Zero if no handler is provided |
fdwvalidator | oid | pg_proc.oid | A reference to a validator function that is responsible for checking the validity of the options provided to the foreign-data wrapper. This function also checks the options for foreign servers and user mappings using the foreign-data wrapper. Zero if no validator is provided |
fdwacl | aclitem[] | Access privileges; see GRANT and REVOKE for details | |
fdwoptions | text[] | Foreign-data wrapper-specific options, as "keyword=value" strings |
Parent topic: System Catalogs Definitions