Mastering SAP ABAP

Handling

Prior to the introduction of class-based, object-oriented programming in SAP systems, one of the methods of code modularization was function modules. The reusable code components with a particular task to do were wrapped into pretty simple function calls, and the modules were bundled into function groups. The function modules—despite the fact that they were mostly superseded by the classes and methods—are still necessary when using Remote Function Call (RFCs).

Even if the code is well thought out and well written, it is still necessary to ensure that the system will not fail if something unexpected happens. What is even more important, it is required to prevent the database from having inconsistent data, even if processing is interrupted ...