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postgreSQL Foreign Data Wrapper


To access complete schema of server db instead of single table. Follow below steps:

1. Create EXTENSION :

 CREATE EXTENSION postgres_fdw;

2. Create SERVER :

 CREATE SERVER server_name FOREIGN DATA WRAPPER postgres_fdw OPTIONS (host 'host_ip',
 dbname 'db_name', port 'port_number');

3. Create USER MAPPING:

 CREATE USER MAPPING FOR CURRENT_USER
 SERVER server_name
 OPTIONS (user 'user_name', password 'password');

4. Create new schema to access schema of server DB:

 CREATE SCHEMA schema_name;

5. Import server schema:

 IMPORT FOREIGN SCHEMA schema_name_to_import_from_remote_db
 FROM SERVER server_name
 INTO schema_name;

6. Access any table of server schema:

 SELECT * FROM schema_name.table_name;

This can be used to access multiple schema of remote DB.

Conclusion

In this page (written and validated by ) you learned about postgreSQL Foreign Data Wrapper . What's Next? If you are interested in completing postgreSQL tutorial, your next topic will be learning about: postgreSQL Find String Length Character Length.



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