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<?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.unilife.mapper.AiChatSessionMapper">
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<!-- 结果映射 -->
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<resultMap id="AiChatSessionResultMap" type="com.unilife.model.entity.AiChatSession">
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<id column="id" property="id"/>
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<result column="user_id" property="userId"/>
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<result column="title" property="title"/>
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<result column="created_at" property="createdAt"/>
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<result column="updated_at" property="updatedAt"/>
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</resultMap>
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<!-- 插入会话 -->
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<insert id="insert" parameterType="com.unilife.model.entity.AiChatSession">
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INSERT INTO ai_chat_sessions (
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id, user_id, title, created_at, updated_at
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) VALUES (
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#{id}, #{userId}, #{title}, #{createdAt}, #{updatedAt}
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)
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</insert>
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<!-- 根据ID查询会话 -->
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<select id="selectById" resultMap="AiChatSessionResultMap">
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SELECT id, user_id, title, created_at, updated_at
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FROM ai_chat_sessions
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WHERE id = #{id}
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</select>
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<!-- 根据用户ID分页查询会话列表 -->
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<select id="selectByUserId" resultMap="AiChatSessionResultMap">
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SELECT id, user_id, title, created_at, updated_at
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FROM ai_chat_sessions
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WHERE user_id = #{userId}
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ORDER BY updated_at DESC
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LIMIT #{offset}, #{limit}
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</select>
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<!-- 查询匿名会话列表 -->
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<select id="selectAnonymousSessions" resultMap="AiChatSessionResultMap">
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SELECT id, user_id, title, created_at, updated_at
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FROM ai_chat_sessions
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WHERE user_id IS NULL
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ORDER BY updated_at DESC
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LIMIT #{offset}, #{limit}
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</select>
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<!-- 统计用户会话总数 -->
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<select id="countByUserId" resultType="long">
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SELECT COUNT(*)
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FROM ai_chat_sessions
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WHERE user_id = #{userId}
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</select>
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<!-- 统计匿名会话总数 -->
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<select id="countAnonymousSessions" resultType="long">
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SELECT COUNT(*)
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FROM ai_chat_sessions
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WHERE user_id IS NULL
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</select>
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<!-- 更新会话标题 -->
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<update id="updateTitle">
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UPDATE ai_chat_sessions
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SET title = #{title}, updated_at = CURRENT_TIMESTAMP
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WHERE id = #{id}
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</update>
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<!-- 更新会话的最后消息时间和消息数量（简化方案中保留方法但不使用） -->
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<update id="updateMessageInfo">
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UPDATE ai_chat_sessions
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SET updated_at = CURRENT_TIMESTAMP
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WHERE id = #{id}
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</update>
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<!-- 删除会话 -->
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<delete id="deleteById">
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DELETE FROM ai_chat_sessions WHERE id = #{id}
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</delete>
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<!-- 批量删除过期会话 -->
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<delete id="deleteExpiredSessions">
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DELETE FROM ai_chat_sessions
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WHERE updated_at < #{expireTime}
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</delete>
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</mapper>
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