IMPORT FOREIGN SCHEMA
IMPORT FOREIGN SCHEMA
7
SQL - Language Statements
IMPORT FOREIGN SCHEMA
import table definitions from a foreign server
IMPORT FOREIGN SCHEMA remote_schema
[ { LIMIT TO | EXCEPT } ( table_name [, ...] ) ]
FROM SERVER server_name
INTO local_schema
[ OPTIONS ( option 'value' [, ... ] ) ]
Description
IMPORT FOREIGN SCHEMA creates foreign tables that
represent tables existing on a foreign server. The new foreign tables
will be owned by the user issuing the command and are created with
the correct column definitions and options to match the remote tables.
By default, all tables and views existing in a particular schema on the
foreign server are imported. Optionally, the list of tables can be limited
to a specified subset, or specific tables can be excluded. The new foreign
tables are all created in the target schema, which must already exist.
To use IMPORT FOREIGN SCHEMA, the user must have
USAGE privilege on the foreign server, as well as
CREATE privilege on the target schema.
Parameters
remote_schema
The remote schema to import from. The specific meaning of a remote schema
depends on the foreign data wrapper in use.
LIMIT TO ( table_name [, ...] )
Import only foreign tables matching one of the given table names.
Other tables existing in the foreign schema will be ignored.
EXCEPT ( table_name [, ...] )
Exclude specified foreign tables from the import. All tables
existing in the foreign schema will be imported except the
ones listed here.
server_name
The foreign server to import from.
local_schema
The schema in which the imported foreign tables will be created.
OPTIONS ( option 'value' [, ...] )
Options to be used during the import.
The allowed option names and values are specific to each foreign
data wrapper.
Examples
Import table definitions from a remote schema foreign_films
on server film_server, creating the foreign tables in
local schema films:
IMPORT FOREIGN SCHEMA foreign_films
FROM SERVER film_server INTO films;
As above, but import only the two tables actors and
directors (if they exist):
IMPORT FOREIGN SCHEMA foreign_films LIMIT TO (actors, directors)
FROM SERVER film_server INTO films;
Compatibility
The IMPORT FOREIGN SCHEMA command conforms to the
SQL standard, except that the OPTIONS
clause is a PostgreSQL extension.
See Also