The Loader is a database tool for unloading and loading data and for formatting (transforming) data between different data sources and data targets. It uses commands and SQL statements to perform these tasks.
The Loader consists of a server part and a client part. The server is called the Loader Server. A possible client is the command line-oriented Loader CLI. A script interface (such as for Perl, Python, or Java) is available. If you want to react to Loader return codes, you must use the script interface.
See also Architecture of the Loader and the documentation on the Loader