klp-oa/klp-mes/src/main/resources/mapper/roll/MesRollStandbyMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.klp.mes.roll.mapper.MesRollStandbyMapper">

    <!-- 按产线+机架查询下批轧辊，附带辊位中文标签 -->
    <select id="selectByStand" resultType="com.klp.mes.roll.domain.vo.MesRollStandbyVo">
        SELECT
            standby_id, line_id, stand_no, roll_no, roll_type, position,
            CASE
                WHEN roll_type = 'BR' AND position = 'UP'   THEN '上支撑辊'
                WHEN roll_type = 'WR' AND position = 'UP'   THEN '上工作辊'
                WHEN roll_type = 'WR' AND position = 'DOWN' THEN '下工作辊'
                WHEN roll_type = 'BR' AND position = 'DOWN' THEN '下支撑辊'
                ELSE CONCAT(position, roll_type)
            END AS position_label,
            diameter, roughness, crown, ready_time, remark, create_time
        FROM mes_roll_standby
        WHERE del_flag = 0
          AND stand_no = #{standNo}
          <if test="lineId != null">AND line_id = #{lineId}</if>
        ORDER BY
            FIELD(roll_type, 'BR', 'WR', 'WR', 'BR'),
            FIELD(position, 'UP', 'UP', 'DOWN', 'DOWN')
    </select>

    <!-- 逻辑删除指定产线+机架所有下批轧辊（清空） -->
    <update id="clearByStand">
        UPDATE mes_roll_standby
        SET del_flag = 1
        WHERE del_flag = 0
          AND stand_no = #{standNo}
          <if test="lineId != null">AND line_id = #{lineId}</if>
    </update>

</mapper>