Start of selection triggered

Question

I understand that START-OF-SELECTION is triggered when the user executes the program (after the selection screen), but still there is something missing. Example: If I have the code:

gv_var = 2.
INITIALIZATION.
gv_var = 1.

the initialization code will be executed first, but if I have:

gv_var = 2.
START-OF-SELECTION.
gv_var = 1.

Start-of-selection will not be the first thing executed after the user executes. So my question is: What exactly is the point of START-OF-SELECTION if it is not the first thing that is executed after the selection screen? Is it just to make the program easier to read?

Answer 1

You may want to refresh your knowledge about Event Blocks in Executable Programs . INITIALIZATION is run before START-OF-SELECTION , and even before the display of the selection screen. The other important information is

In an executable program, any non-declarative statements that occur between the REPORT or PROGRAM statement and the first processing block are also processed in the START-OF-SELECTION block.

(described here )