ABAP Field Symbol Usage

Here is a short sample which illustrates the usage of field symbols with work areas (headers) . Even though we don't know the number or the name of elements in a work area , we can dynamically get them like below. Field symbols are indispensable for complicated applications or reports. Also they could provide a solution for performance issues in some cases. Beside the usage below there are much more ways to use it. For more information just check out the documentation in sdn.

FIELD-SYMBOLS :  TYPE ANY ,

                 TYPE ANY .

DATA : t_table TYPE TABLE OF pa0001 WITH HEADER LINE.

SELECT * FROM pa0001 INTO TABLE t_table UP TO 100 ROWS.

LOOP AT t_table ASSIGNING  .

WRITE : /.

  " Loop at fields

  DO.

    ASSIGN COMPONENT sy-index OF STRUCTURE  TO .

    IF sy-subrc EQ 0.

      WRITE : .

    ELSE.

      EXIT.

    ENDIF.

  ENDDO.

ENDLOOP.