PG_FOREIGN_DATA_WRAPPER
PG_FOREIGN_DATA_WRAPPER records foreign-data wrapper definitions. A foreign-data wrapper is the mechanism by which external data, residing on foreign servers, is accessed.
| Name | Type | Reference | Description |
|---|---|---|---|
| oid | oid | - | Row identifier (hidden attribute, which must be specified) |
| fdwname | name | - | Name of a foreign-data wrapper |
| fdwowner | oid | OID in PG_AUTHID | Owner of a foreign-data wrapper |
| fdwhandler | oid | OID in PG_PROC | References a handler function that is responsible for supplying execution routines for a foreign-data wrapper The value is 0 if no handler is provided. |
| fdwvalidator | oid | OID in PG_PROC | References a validator function that is responsible for checking the validity of the options given to a foreign-data wrapper, as well as options for foreign servers and user mappings using the foreign-data wrapper. The value is 0 if no validator is provided. |
| fdwacl | aclitem[] | - | Access permissions |
| fdwoptions | text[] | - | Foreign-data wrapper specific option, expressed in a string in the format of keyword=value |
