【ABAP基础】在Dialog Screen上面放置SELECT-OPTIONS、PARAMETERS(from 老白)

REPORT  z_barry_test .

TABLES mara.
DATA: ok_code LIKE sy-ucomm ,
      repid LIKE sy-repid.
SELECTION-SCREEN BEGIN OF SCREEN 2000 AS SUBSCREEN.
PARAMETERS p_erdat LIKE sy-datum OBLIGATORY.
SELECT-OPTIONS s_matnr FOR mara-matnr .
SELECTION-SCREEN END OF SCREEN 2000.

START-OF-SELECTION.
  repid = sy-repid.
  CALL SCREEN 100.

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PROCESS BEFORE OUTPUT.
  CALL SUBSCREEN sub1 INCLUDING repid '2000' .

PROCESS AFTER INPUT.
  CALL SUBSCREEN sub1.