Nested structures within ABAP

Question

Hello,
I am working on an ABAP report where the output file will need to look something like:-
1 Material No, Description
2 EAN, ...
3 ..., ..., ...
3 ..., ..., ...
4 ..., ..., ...
4 ..., ...
Some of the record types will only have one line and others will have multiple.
I was hoping to create an internal table into which I could extract all of the relevant data.
To do this, I was thinking of setting up my internal table as a nested structure so I would define some types for each record type
e.g.
types: begin of rec_type_1
matnr like mara-matnr
end of rec_type_1
types: begin of rec_type_2
end of rec_type_2
and then I could declare my internal table something like:-
data: begin of itab
  rec1 type rec_type_1
  rec2 type rec_type_2
end of itab
I could then extract the relevant information for each material into the appropriate record types.
This will work OK for all the record types where this is only going to be 1 line per material but I am not sure how to extend this for the record structures for which there will be multiple lines per material.
I was thinking of declaring a table and then adding this as an element into the itan structure.
Will this work? And does anyone have any code samples of this sort of thing?
Thanks,
Ruby

Answer 1

Hi
I think so but it should be better you structure was:
types: begin of rec_type_1
end of rec_type_1.
types: begin of rec_type_2
end of rec_type_2.
types: t_rec_type1 type standard table of rec_type_1,
       t_rec_type2 type standard table of rec_type_2.
data: begin of itab occurs 0,
matnr type matnr,
rec1 type t_rec_type_1
rec2 type t_rec_type_2
end of itab.
data: wa1 type rec_type_1,
      wa2 type rec_type_2.
SORT ITAB BY MATNR.
LOOP AT ITAB.
WRITE ITAB-MATNR.
SORT ITAB-REC1 BY ...
LOOP AT ITAB-REC1 INTO WA1.
WRITE WA1.
ENDLOOP.
SORT ITAB-REC2 BY ...
LOOP AT ITAB-REC2 INTO WA2.
WRITE WA2.
ENDLOOP.
ENDLOOP.
Max