OO : Using generic attribute in Superclass

mgross1 — Fri, 12 Aug 2016 14:30:24 GMT

Basic OO question:

I have a global class Main with 2 global subclasses Main_sub1 and Main_sub2.

In both Main_sub1 and Main_sub2 I will be selecting data from two different custom tables into internal tables.

Is it possible to use a static generic attribute gt_data in Main that can be used to store the data in both Main_sub1 and Main_sub2?

I tried it this way:

CLASS main DEFINITION
   PUBLIC
   ABSTRACT
   CREATE PUBLIC.

PROTECTED SECTION.
CLASS-DATA gt_data TYPE REF TO data.
METHODS get_data
ABSTRACT.

CLASS main_sub1 DEFINITION.
   PUBLIC
   INHERITING FROM main
   CREATE public.

METHODS GET_DATA
REDEFINITION.

CLASS main_sub1 IMPLEMENTATION.

METHOD GET_DATA.

FIELD-SYMBOLS : <fs_data> TYPE ztab1.

ASSIGN gt_data->* TO <fs_data>.
SELECT * ztab1 INTO TABLE gt_data.

ENDMETHOD.

But the deferencing / field symbol assigning doesn't work.

Re: OO : Using generic attribute in Superclass

Sandra_Rossi — Fri, 12 Aug 2016 14:33:41 GMT

correct your code as follows:

TYPES ty_ztab1 TYPE TABLE OF ztab1.

FIELD-SYMBOLS <fs_data> TYPE ty_ztab1.

CREATE DATA gt_data TYPE TABLE OF ztab1.

ASSIGN gt_data->* TO <fs_data>.

SELECT * ztab1 INTO TABLE <fs_data>.

mgross1 — Fri, 12 Aug 2016 14:37:44 GMT

It works thanks!

I stupidly forgot the CREATE DATA line.