RFC 2

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[Source Code]

TABLES PA0001.

IF I_PERNR IS NOT INITIAL
  AND S_DAY IS NOT INITIAL
  AND E_DAY IS NOT INITIAL.

  SELECT * FROM PA0001
    INTO CORRESPONDING FIELDS OF TABLE TAB1
    WHERE PERNR = I_PERNR
    AND BEGDA = S_DAY
    AND ENDDA = E_DAY.

"DB 업로드 구문
ELSEIF  TAB1[] IS NOT INITIAL.  "= 'X'.
   MODIFY PA0001 FROM TABLE TAB1.
ENDIF.

  IF SY-SUBRC = 0.
    RETURN-TYPE = 'S'.
    RETURN-MESSAGE = '성공'.
  ELSE.
    RETURN-TYPE = 'E'.
    RETURN-MESSAGE = '에러'.

  ENDIF.

INITIAL에도 OR와 AND조건을 줄수 있다는걸 처음알았다.