日期-select-option的多项起始默认值 和最大项最小项
最大项最小项：
************* 选择屏幕定义 ****************************************
SELECTION-SCREEN BEGIN OF BLOCK block1 WITH FRAME TITLE text-001. "选择屏幕块
SELECT-OPTIONS: s_xianb FOR zppr003-xianb OBLIGATORY.
SELECT-OPTIONS: s_date FOR zppr001-riqi OBLIGATORY .
SELECTION-SCREEN END OF BLOCK block1 .
*******************************************************************
* INITIALIZATION
INITIALIZATION.
DATA p_i_day_start LIKE sy-datum.
DATA p_i_day_end LIKE sy-datum.
CONCATENATE sy-datum+0(6) '01' INTO p_i_day_start.
CALL FUNCTION 'RP_LAST_DAY_OF_MONTHS'
EXPORTING
day_in = p_i_day_start
IMPORTING
last_day_of_month = p_i_day_end.
s_date-low = p_i_day_start.
s_date-high = p_i_day_end.
APPEND s_date.
多项起始默认值：
************* 选择屏幕定义 ****************************************
SELECTION-SCREEN BEGIN OF BLOCK block1 WITH FRAME TITLE text-001. "选择屏幕块
SELECT-OPTIONS: s_xianb FOR zppr003-xianb OBLIGATORY.
SELECT-OPTIONS: s_date FOR zppr001-riqi OBLIGATORY .
SELECTION-SCREEN END OF BLOCK block1 .
*******************************************************************
* INITIALIZATION
INITIALIZATION.
s_xianb-low = '10‘.
s_xianb-option = 'EQ'.
s_xianb-sign = 'I'.
append s_xianb.
s_xianb-low = '20'.
s_xianb-option = 'EQ'.
s_xianb-sign = 'I'.
append s_xianb.
