Wrong TYPES definition?

Question

Hi experts,
For my selection I define a internal table
This works:
DATA: it_lab_data  TYPE TABLE OF zmm_lab_offen,
     wa_lab_data  TYPE zmm_lab_offen.
If I select something I can see the table is filled.
Now, for my selection I need a temporary field more than my transparent table (zmm_lab_offen) has. So I tried to define a new TYPE including this table.
TYPES: BEGIN OF s_lab_data,
         struk TYPE zmm_lab_struktur,
         loekz TYPE boolean,
       END OF s_lab_data.
TYPES: tt_lab_data TYPE STANDARD TABLE OF s_lab_data WITH DEFAULT KEY.
DATA: it_lab_data TYPE tt_lab_data.
SELECT *
FROM  'inner join over 3 tables'
INTO CORRESPONDING FIELDS OF TABLE it_lab_data
WHERE ...
But this doesn't work. The Selection even imports 1600 rows but all fields are empty or has the value '0'!
What am I doing wrong??? I 've got the TYPES definition by the "ABAP Objects" book...
Regards,
Steffen

Answer 1

can't be used in OO context --> generates an error
In the keywordmanual it is recommend to use
DATA: BEGIN OF rec,
        rec LIKE s,
      END OF rec.
instead of
DATA: BEGIN OF rec,
        INCLUDE STRUCTURE s.
DATA:   ...
      END OF rec.
but this also don't work for me. LIKE and STRUCTURE cannot be used in methods. I have to use TYPE...
regards,
steffen