Getting metadata for RFCs using RFC SDK (with position of parameters)

Question

Hi!
I'm currently using the RFC SDK Function "RfcGetFunctionInfoAsTable" to retrieve metadata for RFCs from SAP. What i see is that the "Position" field in the RFC_FIELDS_U structure contains arbitrary values, and so I am not able to determine what is the actual ordering of the parameters.
What can I do to determine the exact ordering of the parameters of an RFC? (ordering as in - I want to obtain the parameters in the same order as they appear in SAP GUI).
Thanks,
Mustansir

Answer 1

Hi,
I think you can use the code similar to the one below...
some of the things not covered in this are
1. all types for which   CALL FUNCTION 'RFC_GET_NAMETAB' is not returning result, you can call CALL FUNCTION 'RFC_GET_STRUCTURE_DEFINITION' directly. I have not covered that in this code. Hope this is helps in resolving your issue.
Also, the code is not optimized. So there is some scope for optimization of this code.
REPORT  ZTEST_GET_SREUCTURE.
DATA : PARAMS     type table of     RFC_FUNINT,
      ls_params like line of params.
data: NAMETAB     type table of     X031L,
      ls_NAMETAB like line of NAMETAB.
data: FIELDS  type table of RFC_FIELDS,
      ls_fields like line of fields.
CALL FUNCTION 'RFC_GET_FUNCTION_INTERFACE'
  EXPORTING
    FUNCNAME                      = 'fm_test_fm'
  TABLES
    PARAMS                        = PARAMS
IF SY-SUBRC <> 0.
ENDIF.
loop at params into ls_params.
  CALL FUNCTION 'RFC_GET_NAMETAB'
    EXPORTING
      TABNAME                     = LS_PARAMS-TABNAME
    TABLES
      NAMETAB                     = NAMETAB
  IF SY-SUBRC <> 0.
  ENDIF.
  loop at NAMETAB into ls_NAMETAB.
    CALL FUNCTION 'RFC_GET_STRUCTURE_DEFINITION'
  EXPORTING
    TABNAME                     = LS_NAMETAB-ROLLNAME
  TABLES
    FIELDS                      = FIELDS
    loop at fields into ls_fields.
      write: ls_fields-FIELDNAME.
    endloop.
  endloop.
  endloop.