ieplus/ie-system/src/main/resources/mapper/learn/LearnStudentMapper.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.ruoyi.learn.mapper.LearnStudentMapper">

    <resultMap type="LearnStudent" id="LearnStudentResult">
        <result property="studentId"    column="student_id"    />
        <result property="classId"    column="class_id"    />
        <result property="schoolId"    column="school_id"    />
        <result property="campusId"    column="campus_id"    />
        <result property="universityId"    column="university_id"    />
        <result property="directKey"    column="direct_key"    />
        <result property="modules"    column="modules"    />
        <result property="majorGroup"    column="major_group"    />
        <result property="majorPlanId"    column="major_plan_id"    />
    </resultMap>

    <sql id="selectLearnStudentVo">
        select student_id, class_id, school_id,campus_id, university_id,direct_key, modules, major_group,major_plan_id from learn_student
    </sql>

    <select id="selectLearnStudentList" parameterType="LearnStudent" resultMap="LearnStudentResult">
        <include refid="selectLearnStudentVo"/>
        <where>
            <if test="directKey != null  and directKey != ''"> and direct_key = #{directKey}</if>
        </where>
    </select>

    <select id="selectLearnStudentsByMap" parameterType="map" resultMap="LearnStudentResult"> <!-- 排除本批次已经生成的 -->
      SELECT ls.`student_id`, ls.`university_id`, ls.`major_group`, ls.`major_plan_id`, ls.`direct_key`, u.exam_type examType, ls.campus_id, ls.class_id, ls.school_id
        FROM `learn_student` ls
        LEFT JOIN `learn_test_student` ts ON ts.`student_id` = ls.`student_id` AND ts.`batch_id` = #{batchId} and ts.build_type = #{buildType} and ts.subject_id = #{subjectId} and ts.class_id = ls.class_id
        JOIN `sys_user` u ON ls.`student_id` = u.`user_id`
        <where> ts.`id` IS NULL
            <choose><when test="directed and universityId != null"> AND ls.`university_id` = #{universityId}</when>
                <when test="directed and universityId == null"> AND ls.`university_id` is not null</when></choose>
            <if test="classIds != null  and classIds.size() > 0"> AND ls.`class_id` IN <foreach item="id" collection="classIds" open="(" separator="," close=")">#{id}</foreach></if>
            <if test="universityId != null"> AND ls.`university_id` = #{universityId}</if>
            <if test="majorGroup != null"> AND ls.`major_group` = #{majorGroup}</if>
            <if test="majorPlanId != null"> AND ls.`major_plan_id` = #{majorPlanId}</if>
            <if test="examType != null  and examType != ''"> AND u.`exam_type` = #{examType}</if>
        </where>
    </select>

    <select id="selectClassStudents" resultMap="LearnStudentResult">
        SELECT ls.*, u.nick_name studentName , tp.`paper_id` paperId, ts.`status`
        FROM `learn_student` ls
        JOIN `sys_user` u ON ls.`student_id` = u.`user_id`
        LEFT JOIN `learn_test_paper` tp ON tp.`batch_id` = #{batchId} AND tp.`direct_key` = ls.`direct_key`
        LEFT JOIN `learn_test_student` ts ON ts.`batch_id` = #{batchId} AND ls.`student_id` = ts.`student_id`
        where ts.`id` IS NULL AND ls.`class_id` IN <foreach item="id" collection="classIds" open="(" separator="," close=")">#{id}</foreach>
    </select>




    <select id="selectLearnStudentByStudentId" parameterType="Long" resultMap="LearnStudentResult">
        <include refid="selectLearnStudentVo"/>
        where student_id = #{studentId}
    </select>

    <insert id="insertLearnStudent" parameterType="LearnStudent">
        insert into learn_student
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="studentId != null">student_id,</if>
            <if test="classId != null">class_id,</if>
            <if test="schoolId != null">school_id,</if>
            <if test="campusId != null">campus_id,</if>
            <if test="universityId != null">university_id,</if>
            <if test="directKey != null">direct_key,</if>
            <if test="modules != null">modules,</if>
            <if test="majorGroup != null">major_group,</if>
            <if test="majorPlanId != null">major_plan_id,</if>
         </trim>
        <trim prefix="values (" suffix=")" suffixOverrides=",">
            <if test="studentId != null">#{studentId},</if>
            <if test="classId != null">#{classId},</if>
            <if test="schoolId != null">#{schoolId},</if>
            <if test="campusId != null">#{campusId},</if>
            <if test="universityId != null">#{universityId},</if>
            <if test="directKey != null">#{directKey},</if>
            <if test="modules != null">#{modules},</if>
            <if test="majorGroup != null">#{majorGroup},</if>
            <if test="majorPlanId != null">#{majorPlanId},</if>
         </trim>
    </insert>

    <update id="updateLearnStudent" parameterType="LearnStudent">
        update learn_student
        <trim prefix="SET" suffixOverrides=",">
            <if test="classId != null">class_id = #{classId},</if>
            <if test="schoolId != null">school_id = #{schoolId},</if>
            <if test="campusId != null">campus_id = #{campusId},</if>
            <if test="universityId != null">university_id = #{universityId},</if>
            <if test="directKey != null">direct_key = #{directKey},</if>
            <if test="modules != null">modules = #{modules},</if>
            <if test="majorGroup != null">major_group = #{majorGroup},</if>
            <if test="majorPlanId != null">major_plan_id = #{majorPlanId},</if>
        </trim>
        where student_id = #{studentId}
    </update>

    <delete id="deleteLearnStudentByStudentId" parameterType="Long">
        delete from learn_student where student_id = #{studentId}
    </delete>

    <delete id="deleteLearnStudentByStudentIds" parameterType="String">
        delete from learn_student where student_id in
        <foreach item="studentId" collection="array" open="(" separator="," close=")">
            #{studentId}
        </foreach>
    </delete>

    <!-- 统计学习记录 -->
    <select id="statisticStudyRecord" parameterType="com.ruoyi.learn.dto.StudyRecordStatisticsDTO" resultType="com.ruoyi.learn.dto.StudyRecordStatisticsDTO">
        WITH T1 AS (
            <!-- 定义查询 1 的聚合结果（做题统计）-->
            <!-- 优化：从learn_answer开始JOIN，利用索引，避免date()函数 -->
            SELECT
                a.student_id,
                COUNT(*) AS num,
                SUM(IF(a.state = 1, 1, 0)) AS correct,
                ROUND(SUM(IF(a.state = 1, 1, 0)) * 100.0 / COUNT(*), 1) AS rate,
                COUNT(DISTINCT IF(le.paper_type IN (20,30), le.paper_id, null)) paperCount,
                ROUND(SUM(IF(a.`state` = 1 AND le.paper_type IN (20,30), 1, 0)) * 100.0 / NULLIF(SUM(IF(le.paper_type IN (20,30), 1, 0)), 0), 1) paperRate
            FROM `learn_answer` a
            INNER JOIN `learn_examinee` le ON a.`examinee_id` = le.`examinee_id` AND le.state >= 4
            INNER JOIN `sys_user` u ON le.student_id = u.user_id
            INNER JOIN `dz_cards` dc ON u.card_id = dc.card_id
            WHERE a.`state` > 0
            <if test="studyTimeBegin != null and studyTimeBegin != ''">
                <!-- 优化：去掉date()函数，直接比较datetime，可以使用索引 -->
                AND (a.create_time &gt;= CONCAT(#{studyTimeBegin}, ' 00:00:00') OR le.end_time &gt;= CONCAT(#{studyTimeBegin}, ' 00:00:00'))
            </if>
            <if test="studyTimeEnd != null and studyTimeEnd != ''">
                <!-- 优化：去掉date()函数，直接比较datetime，可以使用索引 -->
                AND (a.create_time &lt;= CONCAT(#{studyTimeEnd}, ' 23:59:59') OR le.end_time &lt;= CONCAT(#{studyTimeEnd}, ' 23:59:59'))
            </if>
            GROUP BY a.student_id
        ),
        T2 AS (
            <!-- 定义查询 2 的聚合结果（视频观看统计）-->
            <!-- 优化：去掉date()函数，直接比较datetime，可以使用索引 -->
            SELECT
                ls.student_id,
                COUNT(DISTINCT vw.title) AS total,
                ROUND(SUM(vw.duration * vw.percent / 100.0)) AS value
            FROM `b_customer_video_watches` vw
            INNER JOIN `learn_student` ls ON vw.customerCode = ls.student_id
            <where>
                <if test="studyTimeBegin != null and studyTimeBegin != ''">
                    AND vw.time &gt;= CONCAT(#{studyTimeBegin}, ' 00:00:00')
                </if>
                <if test="studyTimeEnd != null and studyTimeEnd != ''">
                    AND vw.time &lt;= CONCAT(#{studyTimeEnd}, ' 23:59:59')
                </if>
            </where>
            GROUP BY ls.student_id
        ),
        AllStudents AS (
            <!-- 提取所有涉及的唯一 Student ID-->
            <!-- 优化：使用UNION ALL代替UNION，如果确定student_id不重复可以提升性能 -->
            SELECT student_id FROM T1
            UNION
            SELECT student_id FROM T2
        ),
        StudentBaseInfo AS (
            <!-- 获取所有涉及学生的基础信息-->
            <!-- 优化：简化COALESCE，去掉不必要的NULL判断 -->
            SELECT DISTINCT
                dc.dept_id,
                asl.student_id,
                dc.school_id,
                dc.class_id,
                dc.campus_id,
                dc.campus_class_id,
                dc.agent_id,
                dc.leaf_agent_id,
                u.nick_name AS nick_name,
                dc.card_no
            FROM AllStudents asl
            LEFT JOIN `sys_user` u ON asl.student_id = u.user_id
            LEFT JOIN `dz_cards` dc ON u.card_id = dc.card_id
        )
        <!-- 主查询：将统计数据 LEFT JOIN 到基础信息上-->
        SELECT
            <!-- 基础信息字段（已补齐，始终输出）-->
            SBI.school_id as schoolId,
            SBI.class_id as classId,
            SBI.campus_id as campusId,
            SBI.campus_class_id as campusClassId,
            SBI.agent_id as agentId,
            SBI.leaf_agent_id as leafAgentId,
            SBI.nick_name as nickName,
            SBI.card_no as cardNo,
            SBI.student_id as studentId,

            <!-- T1 统计结果-->
            COALESCE(T1.num, 0) AS num,
            COALESCE(T1.correct, 0) AS correct,
            <!-- RATE 字段处理：如果 T1.num 为 0 则 Rate 为 0-->
            CASE
                WHEN COALESCE(T1.num, 0) = 0 THEN 0
                ELSE T1.rate
            END AS rate,
            COALESCE(T1.paperCount, 0) AS paperCount,
            COALESCE(T1.paperRate, 0) AS paperRate,

            <!-- T2 统计结果-->
            COALESCE(T2.total, 0) AS videoTotalTitles,
            COALESCE(T2.value, 0) AS videoDurationValue

        FROM
            StudentBaseInfo AS SBI
        LEFT JOIN
            T1 ON SBI.student_id = T1.student_id
        LEFT JOIN
            T2 ON SBI.student_id = T2.student_id
        <where>
            <if test="deptId != null"> AND SBI.dept_id = #{deptId}</if>
            <if test="schoolId != null"> AND SBI.school_id = #{schoolId}</if>
            <if test="teacherId != null">
                <!-- 优化：将子查询改为EXISTS，性能更好 -->
                AND EXISTS (
                    SELECT 1 FROM dz_teacher_class t
                    WHERE t.teacher_id = #{teacherId}
                    AND NOW() &lt; t.out_date
                    AND (t.class_id = SBI.class_id OR t.class_id = SBI.campus_class_id)
                )
            </if>
            <if test="classId != null"> AND SBI.class_id = #{classId}</if>
            <if test="campusId != null"> AND SBI.campus_id = #{campusId}</if>
            <if test="campusClassId != null"> AND SBI.campus_class_id = #{campusClassId}</if>
            <if test="agentId != null"> AND (SBI.agent_id = #{agentId} OR SBI.leaf_agent_id = #{agentId})</if>
            <if test="nickName != null and nickName != ''"> AND SBI.nick_name LIKE CONCAT('%', #{nickName}, '%')</if>
            <if test="cardNo != null and cardNo != ''"> AND SBI.card_no LIKE CONCAT('%', #{cardNo}, '%')</if>
        </where>
        ORDER BY
            SBI.student_id
    </select>
</mapper>