Field name referenced by field symbol

Question

Hi,
I would like to get the field name referenced by a field symbol at rutime. In the code below, besides the type and length of the field, I also would like to get the field names 'AA', 'BB' and 'CC' .
Can you please tell me how I can get this information?
DATA: BEGIN OF g_test,
       aa(10)    TYPE c,
       bb        TYPE i,
       cc(20)    TYPE c,
     END OF g_test.
DATA: l_type(20),
      l_len   TYPE i.
FIELD-SYMBOLS <fs>.
START-OF-SELECTION.
  DO 3 TIMES.
    ASSIGN COMPONENT sy-index OF STRUCTURE g_test TO <fs>.
    DESCRIBE FIELD <fs> TYPE l_type OUTPUT-LENGTH l_len.
    WRITE: /5 sy-index, l_type, l_len.
Would like output as:
   1  AA    C 10   instead of  1    C 10
   2  BB    I 11    instead of  2   I 11
   3  CC    C 20   instead of  3    C  20
  ENDDO.
Regards,
Rao A

Answer 1

Hi,
Using your sample structure you can do it using such a code:
DATA: BEGIN OF G_TEST,
        AA(10) TYPE C,
        BB     TYPE I,
        CC(20) TYPE C,
      END OF G_TEST.
TYPE-POOLS: ABAP.
DATA: COMP TYPE LINE OF ABAP_COMPDESCR_TAB.
DATA: STRUCT_REF TYPE REF TO CL_ABAP_STRUCTDESCR.
  STRUCT_REF ?= CL_ABAP_STRUCTDESCR=>DESCRIBE_BY_DATA( G_TEST ).
  LOOP AT STRUCT_REF->COMPONENTS INTO COMP.
    WRITE:/ COMP-NAME, COMP-TYPE_KIND, COMP-LENGTH, COMP-DECIMALS.
  ENDLOOP.
Krzys