4S/target/classes/mapper/AiAlarmTypeLevelMapper.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.zhgd.scs.mapper.AiAlarmTypeLevelMapper">

    <select id="getList" resultType="com.zhgd.scs.domain.AiAlarmTypeLevel">
        SELECT t.`name`                      as typeName,
               t.id                          as typeId,
               COALESCE(tl.id, NULL)         as id,
               COALESCE(tl.`level`, NULL)    as `level`,
               COALESCE(tl.project_id, NULL) as projectId
        FROM ai_alarm_type t
                 LEFT JOIN ai_alarm_type_level tl ON t.id = tl.type_id
            AND tl.project_id = #{projectId}
        ORDER BY t.id DESC
    </select>
    <select id="getInfoByTypeName" resultType="com.zhgd.scs.domain.vo.AiAlarmTypeLevelVo">
        SELECT aat.*,
               COALESCE(aatl.`level`, 1) `level`
        FROM ai_alarm_type aat
                 LEFT JOIN ai_alarm_type_level aatl ON aat.id = aatl.type_id
        where aat.name = #{typeName}
          and aatl.project_id = #{projectId}
    </select>
</mapper>