Runtime Modes of the BRF

Use

The BRF has the following runtime modes:

Interpreter mode:

The BRF was developed as a purely interpretatively operating rule tool. This is also the standard runtime mode.
Compiler mode:

You can use some expression definitions to generate ABAP code that increases the processing speed. If generated code exists, you can choose this mode.
Interpreter mode including Trace Function:

This mode operates like interpreter mode and, in addition, expressions that have already been calculated are processed.

Example

A:=U or V

X:=A and B

Y:=C and A.

In the calculation of X, both A and B are calculated. In the calculation of Y, C is calculated, but A is not recalculated since the result already exists. In the trace, it would not be possible to see how the calculation of Y yielded the calculation of A. A would not have any subnodes. In the calculation of X, you would see the subnodes U and V. In this mode, you can enforce display of not only node A in the trace in the calculation of Y, but also display of the two nodes U and V as well. However, they are only processed to produce an entry in the trace. A new calculation does not take place here.