请尝试以下代码。请注意，您需要在 START-OF_SELECTION

select-OPTIONS: so_date FOR sy-datlo.
INITIALIZATION.
so_date-sign = 'I'.
so_date-option = 'EQ'.
so_date-low = sy-datum.
CLEAR so_date-high.
APPEND so_date.

您也可以尝试这个简单的选项 -

select-OPTIONS: so_date FOR sy-datlo default SY-DATUM.