<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="com.example.jz.dao.MessageDao">
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<resultMap type="com.example.jz.modle.vo.GroupMessageVo" id="GroupMessageVoMap">
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<result property="userName" column="real_name" jdbcType="VARCHAR"/>
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<result property="text" column="text" jdbcType="VARCHAR"/>
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<result property="ctime" column="ctime" jdbcType="TIMESTAMP"/>
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</resultMap>
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<select id="getAllMessageByGroup" resultMap="GroupMessageVoMap">
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select u.real_name, m.text, m.ctime
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from message m
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join user u on m.user_id = u.id
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where m.group_id = #{groupId}
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order by m.ctime desc
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</select>
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</mapper>
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