Features of the Hadoop Foreign Data Wrapper

The key features of the Hadoop Foreign Data Wrapper are listed below:

Automated Cleanup

Hadoop Foreign Data Wrappper allows the cleanup of foreign tables in a single operation using DROP EXTENSION command. This feature is specifically useful when a foreign table is set for a temporary purpose, as in case of data migration. The syntax:

DROP EXTENSION hdfs_fdw CASCADE;

For more information, see DROP EXTENSION.