ttc_5.0/ttc-backen/target/classes/mapper/SysProtocolMapper.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="cn.ubitech.ttc.dao.SysProtocolMapper">

    <!-- 开启二级缓存 -->
    <select id="getLastProtocol" resultType="cn.ubitech.ttc.entity.SysProtocol">
        SELECT
        p.*
        FROM sys_protocol p
        INNER JOIN sys_protocol_node_lk lk
        ON p.id = lk.pid
        AND p.ptype = #{ptype}
        <if test='node != ""'>
          AND lk.node = #{node}
        </if>
        ORDER BY p.updatetime DESC LIMIT 0, 1
    </select>

</mapper>