在选择屏幕定义的时候，我们经常会运用NO INTERVALS，将字段改成单值，但是后面的选择框中还有多值输入。
具体的实现方式，是通过函数SELECT_OPTIONS_RESTRICT进行控制，具体代码如下：
代码语言：javascript复制*定义选择屏幕
SELECT-OPTIONS : s_matnr FOR marc-matnr NO INTERVALS,
s_werks FOR marc-werks.
INITIALIZATION.
* 限制MATNR参数只能使用‘EQ’ 和‘BT’.
optlist-name = 'OBJECTKEY1'.
optlist-options-eq = 'X'.
* optlist-options-bt = 'X'.
APPEND optlist TO restrict-opt_list_tab.
ass-kind = 'S'.
ass-name = 'S_MATNR'.
ass-sg_main = 'I'.
ass-sg_addy = space.
ass-op_main = 'OBJECTKEY1'.
APPEND ass TO restrict-ass_tab.
* 限制 WERKS 参数只能使用CP, GE, LT, NE.
optlist-name = 'OBJECTKEY2'.
optlist-options-cp = 'X'.
optlist-options-bt = 'X'.
optlist-options-ge = 'X'.
optlist-options-lt = 'X'.
optlist-options-ne = 'X'.
APPEND optlist TO restrict-opt_list_tab.
ass-kind = 'S'.
ass-name = 'S_WERKS'.
ass-sg_main = 'I'.
ass-sg_addy = space.
ass-op_main = 'OBJECTKEY2'.
APPEND ass TO restrict-ass_tab.
CALL FUNCTION 'SELECT_OPTIONS_RESTRICT'
EXPORTING
restriction = restrict
EXCEPTIONS
too_late = 1
repeated = 2
selopt_without_options = 3
selopt_without_signs = 4
invalid_sign = 5
empty_option_list = 6
invalid_kind = 7
repeated_kind_a = 8
OTHERS = 9.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
