Each reasonable algorithm has some input data in addition to the specific processing steps. Input data is processed by a program to generate the expected output. It is no different in the case of algorithms written in the ABAP language. Our input will usually be some business data used in a client-specific process. In this chapter, we will go through some of the possibilities of reading and saving data from and to the application server. We will also go through the steps needed to read and write data from local PC. The chapter will show you typical problems for this type of task and how to deal with the multitude of file formats each developer must deal with on a daily basis. We will be covering the following topics:
- Reading files from the local PC using gui_upload
- Writing files to the local PC using gui_download
- Basic transactions related...
