Data Interfaces

File Processing
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Open file
Process file
Close file
Before data records can be written to a sequential file or read from a file, the file must be opened.
After processing, the file is closed.
In the program, you call the file by its absolute file name. The absolute file name consists of the exact
path and the actual (relative) file name, e.g. '/tmp/bc180/d01' (note that file names are case-sensitive).
The format of file names is largely dependent on the operating system. You can access portable
programs with the function module FILE_GET_NAME which returns the physical name for a given
logical file name. See also the online documentation for the module in Transaction SE37 or refer to the
online ABAP/4 User’s Guide.