52.23. 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 52.23.
pg_foreign_data_wrapper
Columns
| Name | Type | References | Description |
|---|---|---|---|
oid
|
oid
|
Row identifier (hidden attribute; must be explicitly selected) | |
fdwname
|
name
|
Name of the foreign-data wrapper | |
fdwowner
|
oid
|
|
Owner of the foreign-data wrapper |
fdwhandler
|
oid
|
|
References a handler function that is responsible for supplying execution routines for the foreign-data wrapper. Zero if no handler is provided |
fdwvalidator
|
oid
|
|
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 |
fdwacl
|
aclitem[]
|
Access privileges; see GRANT and REVOKE for details | |
fdwoptions
|
text[]
|
Foreign-data wrapper specific options, as " keyword=value " strings |