01.日期

日期格式校验

DATE_CHECK_PLAUSIBILITY

日期n月前

DATA: p_months TYPE i VALUE -4, 
      p_date TYPE D.
CALL FUNCTION 'MONTH_PLUS_DETERMINE'
    EXPORTING
      MONTHS        = p_months
      OLDDATE       = sy-datum
    IMPORTING
      NEWDATE       = p_date.
WRITE: p_date.