Use of changing parameter and raising parameter in methods

[Junaidshaik284]

I would like to know about that and I am a little bit confusing using it and so tell me an appropriate example to know the working process of changing parameter and raising also and I know the working process in methods in oops

Thanks

[FredericGirod]

Could you be more specific ? what is the context ?

[Sandra_Rossi]

I don't understand the question. I don't see any relationship between changing and raising. I guess it should be 2 different questions. What is "changing"? What is "raising"? Of course, it's very well detailed in the ABAP documentation, so you should explain WHAT you don't understand.

[manfred_reinart]

are you asking about basics on using CHANGING parameters in ABAP OO methods and basics about raising exceptions?

[Junaidshaik284]

yes I am asking basics and I Just little bit confused changing parameter

[Sandra_Rossi]

"Changing" is to indicate parameters which need to be changed, like "translating" a text to upper case, you need an input text, and it's changed. Why are you confused?

"Raising" is about the concept of class-based exceptions. It's same as Exceptions that you may know for function modules but with many more features.

Of course, they are explained in the ABAP documentation: ABAP Keyword Documentation - CHANGING and ABAP Keyword Documentation - Class-Based Exceptions.

[Junaidshaik284]

We also can change export parameter. While calling methods, we can pass values and can be modified and same working in changing also and how it is different both

[FredericGirod]

If you are speaking about method, you are suppose to use IMPORTING EXPORTING or RETURNING.

Better is to use only IMPORTING and RETURNING, because a method should return only one result as it should do only one task (SOLIDE Principle)

You are maybe making confusion with FORM and CALL FUNCTION, having other kind of parameters, but it is old school

[Sandra_Rossi]

Okay, so that's your question: "why having Changing and Exporting if they do the same?" Which is not related to "Changing and Raising".

Please ask a new question then.