历史版本。 PostgreSQL 9.2 已结束支持。 2017-11-09. 请参阅 当前版本手册.
45.22. pg_foreign_data_wrapper #
目录pg_foreign_data_wrapper存储外部数据包装器定义。外部数据包装器是一种访问位于外部服务器上数据的机制。
表 45.22. pg_foreign_data_wrapper 列
| Name | Type | References | Description |
|---|---|---|---|
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 |