ABAP Stack : Subroutines

[Former Member]

Hi Everyone,

I was wondering how can you access the local variable of a subroutine using ABAP Stack.

E.g.

REPORT A.

...

PERFORM B.

....

FORM B

data : var2

.....

CALL FUNCTION C

ENDFORM

FUNCTION C.

<access var2 here>

ENDFUNCTION.

I only know that you can usually access variables via (PROGNAME)variable and assign it to an <FS>.

Thanks,

Patrick

[mvoros]

Hi,

you can't. The local variables are usually created on stack so when you leave the routine all local variables are removed from stack. I am not 100% that ABAP AS allocates the local variables on stack (or at least subset of local variables) but the behavior is same. The local variables are not accessible from outside.

Cheers

[Former Member]

Hi,

Even if the call is still active? (e.g. there are many more statements after the CALL FUNCTION)?

Thanks,

[mvoros]

It's still on the stack but still not accessible. Why don't you pass it as a parameter of function C?

Edited by: Martin Voros on May 31, 2011 1:25 PM

[Wil_Wilstroth]

Hi f0Xg3!,

ABAP stack if i am not mistaken is a way for you to navigate through the flow of objects like programs, screen and other objects in the event of run time.

For a variable which is "LOCALLY" declared in a subroutine and you want to see it in call function... it is not possible. If anyone says its possible please enlighten me too.

Now, when a variable is "LOCALLY" declared, the visibility of this variable is only in the scope of that subroutine.

Any variable that you want to see in a call function, it should be pass over through EXPORTING. Although you may wrote your CALL FUNCTION in that sub-routine... but the CALL FUNCTION is registered or declared in its own Function Group's scope... so the locally declared variable in a subroutine will not be visible.

Hence, I don't think it will work for your idea.

Just my opinion.

Regards,

W. Wilstroth

[Former Member]

I can't, I'm just implementing an exit. I know that the values are stored in a stack (and the calls are active when this exit is called), I might change values. But I realized that the data I'm trying to change is a local subroutine variable

Oh well, thanks for the help.

[mvoros]

Probably implicit enhancement points can solve your problem. Overlay the standard routine with your custom code if you really think that it's necessary.

Cheers