java如何实现（数据库中没有对应的字段值）状态查询，启用，禁用，结束

         <if test="rq.status != null and rq.status != ''">
                <choose>
                    <when test="rq.status == '2'.toString()">
                        and (status='2' or  (CONCAT(promEndDate,CONCAT(' ',promEndTime)) &lt; date_format(now(), '%Y-%m-%d %H:%i')))
                    </when>
                    <when test="rq.status == '1'.toString()">
                        and (status='1' and  (CONCAT(promEndDate,CONCAT(' ',promEndTime)) &gt;= date_format(now(), '%Y-%m-%d %H:%i')))
                    </when>
                    <when test="rq.status == '0'.toString()">
                        and (status='0' and  (CONCAT(promEndDate,CONCAT(' ',promEndTime)) &gt;= date_format(now(), '%Y-%m-%d %H:%i')))
                    </when>
                    <otherwise>
                        and status = #{rq.status}
                    </otherwise>
                </choose>
            </if>```