4S/target/classes/mapper/TraceWatchesPhoneWhitelistMapper.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.TraceWatchesPhoneWhitelistMapper">

    <select id="getList" resultType="com.zhgd.scs.domain.TraceWatchesPhoneWhitelist">
        SELECT w.*
        FROM trace_watches_phone_whitelist w
                 LEFT JOIN `scs-hk-v1`.trace_watches_phone_whitelist_device_ref ref on w.id = ref.whitelist_id
        WHERE ref.device_code = #{deviceCode}
    </select>
</mapper>