IMPORT FOREIGN SCHEMA

IMPORT FOREIGN SCHEMA — import table definitions from a foreign server

Synopsis

IMPORT FOREIGN SCHEMA
remote_schema
[ { LIMIT TO | EXCEPT } (
table_name
[, ...] ) ]
FROM SERVER
server_name
INTO
local_schema
[ OPTIONS (
option
'
value
' [, ... ] ) ]

Description

IMPORT FOREIGN SCHEMAcreates 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 useIMPORT FOREIGN SCHEMA, the user must haveUSAGEprivilege on the foreign server, as well asCREATEprivilege 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 schemaforeign_filmson serverfilm_server, creating the foreign tables in local schemafilms:

IMPORT FOREIGN SCHEMA foreign_films
FROM SERVER film_server INTO films;

As above, but import only the two tablesactorsanddirectors(if they exist):

IMPORT FOREIGN SCHEMA foreign_films LIMIT TO (actors, directors)
FROM SERVER film_server INTO films;

Compatibility

TheIMPORT FOREIGN SCHEMAcommand conforms to theSQLstandard, except that theOPTIONSclause is aPostgreSQLextension.

See Also

CREATE FOREIGN TABLE

,

CREATE SERVER