ABAP--在SAP中设计自动刷新的报表代码

REPORT zauto_refresh .
DATA: g_init_once,
      ok_code(20),
      g_ref_from_timer.

TYPES: BEGIN OF t_ekko,
  ebeln TYPE ekpo-ebeln,
  ebelp TYPE ekpo-ebelp,
  statu TYPE ekpo-statu,
  aedat TYPE ekpo-aedat,
  matnr TYPE ekpo-matnr,
  menge TYPE ekpo-menge,
  meins TYPE ekpo-meins,
  netpr TYPE ekpo-netpr,
  peinh TYPE ekpo-peinh,
END OF t_ekko.

DATA: it_ekko TYPE STANDARD TABLE OF t_ekko INITIAL SIZE 0,
      wa_ekko TYPE t_ekko.

IF g_init_once <> 'X'.
  g_init_once = 'X'.
  CALL FUNCTION 'Z_ENQUE_SLEEP'
     STARTING NEW TASK 'WAIT'
     PERFORMING when_finished ON END OF TASK.

ENDIF.

WRITE:/ 'wait for 10 sec....'.

AT USER-COMMAND.
  CASE ok_code.
    WHEN 'FCT_R'.
      SELECT ebeln ebelp statu aedat matnr menge meins netpr peinh
       UP TO 10 ROWS
        FROM ekpo
        INTO TABLE it_ekko.
      WRITE:/ sy-uzeit. "Time
      LOOP AT it_ekko INTO wa_ekko.
        WRITE:/ wa_ekko-ebeln, wa_ekko-ebelp.
      ENDLOOP.
      sy-lsind = 0.
      IF g_ref_from_timer = 'X'.

        CALL FUNCTION 'Z_ENQUE_SLEEP'
          STARTING NEW TASK 'INFO'
          PERFORMING when_finished ON END OF TASK.

        g_ref_from_timer = ''.
      ENDIF.
  ENDCASE.

*---------------------------------------------------------------------*
*       FORM WHEN_FINISHED                                            *
*---------------------------------------------------------------------*
*       ........                                                      *
*---------------------------------------------------------------------*
*  -->  TASKNAME                                                      *
*---------------------------------------------------------------------*
FORM when_finished USING taskname.
  RECEIVE RESULTS FROM FUNCTION 'Z_ENQUE_SLEEP'.

  g_ref_from_timer = 'X'.

* Trigger an event to run the at user-command
  SET USER-COMMAND 'FCT_R'.
  ok_code = 'FCT_R'.
  sy-ucomm = 'FCT_R'.

ENDFORM.                    " WHEN_FINISHED

FUNCTION Z_ENQUE_SLEEP.
*"----------------------------------------------------------------------
*"*"Local interface:
*"----------------------------------------------------------------------
wait up to 10 seconds.

*CALL FUNCTION 'ENQUE_SLEEP'
*     EXPORTING
*        SECONDS = 1.

ENDFUNCTION.