Using the postgres_fdw extension to access external data - Amazon Relational Database Service
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Using the postgres_fdw extension to access external data

You can access data in a table on a remote database server with the postgres_fdw extension. If you set up a remote connection from your PostgreSQL DB instance, access is also available to your read replica.

To use postgres_fdw to access a remote database server

  1. Install the postgres_fdw extension.

    CREATE EXTENSION postgres_fdw;

  2. Create a foreign data server using CREATE SERVER.

    CREATE SERVER foreign_server
FOREIGN DATA WRAPPER postgres_fdw
OPTIONS (host 'xxx.xx.xxx.xx', port '5432', dbname 'foreign_db');

  3. Create a user mapping to identify the role to be used on the remote server.

    Important

    To redact the password so that it doesn't appear in the logs, set log_statement=none at the session level. Setting at the parameter level doesn't redact the password.

    CREATE USER MAPPING FOR local_user
SERVER foreign_server
OPTIONS (user 'foreign_user', password 'password');

  4. Create a table that maps to the table on the remote server.

    CREATE FOREIGN TABLE foreign_table (
        id integer NOT NULL,
        data text)
SERVER foreign_server
OPTIONS (schema_name 'some_schema', table_name 'some_table');