pg_foreign_data_wrapper

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.

Table 1. pg_catalog.pg_foreign_data_wrapper
column type references description
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.