How to get the components of structure i.e. list of fields of a structure in SAP-ABAP?

Sometime it might be required to get the components of the structure i.e. list of fields present in structure.

Use function module GET_COMPONENT_LIST to get the components of the structure.

Example:

REPORT ZVENU_TEST4.

DATA: t_components TYPE STANDARD TABLE OF RSTRUCINFO,
      x_components TYPE RSTRUCINFO.

TYPES: BEGIN OF ty_tab,
        kunnr type kna1-kunnr,
        name1 type kna1-name1,
       END OF ty_tab.

DATA: x_kna1 TYPE ty_tab.

*--CAll FM to get hte components of structure
CALL FUNCTION 'GET_COMPONENT_LIST'
  EXPORTING
    PROGRAM          = sy-repid
    FIELDNAME        = 'X_KNA1'
  TABLES
    COMPONENTS       = t_components.

LOOP AT t_components INTO x_components.
  WRITE:/  sy-tabix ,' - Field Name : ', x_components-COMPNAME.
ENDLOOP. Output:

Output:

Similarly, using this functional module we can get the components of structure which is present in another program. In such a case pass the program name to PROGRAM field and structure name to FIELDNAME field.

NOTE: This FM give the components of internal table with header line, whereas using this FM we cannot get the component of structure without header line.

Regards,

Venugopal M N