ABAP Keyword Documentation → ABAP Programming Guidelines → Robust ABAP
System Fields
An ABAP program can request the status of the ABAP runtime environment using the
system fields. From a technical viewpoint, these system
fields are a set of predefined variables - the components of the predefined sy
structure of data type SYST from the ABAP Dictionary - that are always available while the program is running.
The system field sy-repid
is an exception. This field indicates the name
of the program currently running. In this case, we are dealing with a predefined constant and not a component of the predefined sy
structure.
Other versions: 7.31 | 7.40 | 7.54
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Obsolete and Internal System Fields
Using System Fields as Actual Parameters