The default and minimum values of multiple start items of the date-select-option

Minimum entry: ************************ * *************** SELECTION-screen begin of block block1 with frame title text-001. "SELECT Screen Block SELECT-OPTIONS: s_xianb FOR zppr003-xianb OBLIGATORY.SELECT-OPTIONS: s_date FOR zppr001-riqi OBLIGATORY. SELECTION-screen end of block block1. **************************************** * *************************** INITIALIZATIONINITIALIZATION. 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. default values for starting multiple items: ************************ * *************** SELECTION-screen begin of block block1 with frame title text-001. "SELECT Screen Block SELECT-OPTIONS: s_xianb FOR zppr003-xianb OBLIGATORY.SELECT-OPTIONS: s_date FOR zppr001-riqi OBLIGATORY. SELECTION-screen end of block block1. **************************************** * *************************** INITIALIZATIONINITIALIZATION. 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.