refactor: 更改子查询为join
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张松
parent
940f41930f
commit
c4852d5e7e
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@ -7,111 +7,6 @@
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where course_id = #{id}
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</update>
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<select id="selectCourse" resultType="Map">
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SELECT
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c.classify_id AS classifyId,
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c.course_id AS courseId,
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c.course_label AS courseLabel,
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c.create_time AS createTime,
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c.details,
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c.img,
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c.banner_img AS bannerImg,
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c.status,
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c.is_delete AS isDelete,
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c.msg_type AS msgType,
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c.msg_url AS msgUrl,
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c.pay_num AS payNum,
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c.price,
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c.wholesale_price AS wholesalePrice,
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c.is_over AS isOver,
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c.title,
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c.is_price AS isPrice,
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c.title_img AS titleImg,
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c.update_time AS updateTime,
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cc.classification_name AS classificationName,
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c.course_type AS courseType,
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c.banner_id AS bannerId,
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b.name AS bannerName,
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0 AS viewCounts,
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c.dy_img_id AS dyImgId,
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c.dy_course_id AS dyCourseId,
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c.wx_course_id AS wxCourseId,
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c.wx_show AS wxShow,
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c.dy_show AS dyShow,
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c.sort,
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ROUND(10000 * RAND(), 0) AS goodNum,
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d.courseDetailsCount,
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NULL AS courseDetailsName,
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NULL AS courseDetailsId,
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ROUND(10000 * RAND(), 0) AS weekGoodNum,
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0 AS isRecommend
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FROM
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course AS c
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LEFT JOIN
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course_classification AS cc ON c.classify_id = cc.classification_id
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LEFT JOIN
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banner AS b ON b.id = c.banner_id
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LEFT JOIN
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(SELECT course_id, COUNT(*) AS courseDetailsCount
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FROM course_details
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GROUP BY course_id) AS d ON c.course_id = d.course_id
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LEFT JOIN
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(SELECT course_id FROM course_details WHERE good = 1) AS gd ON c.course_id = gd.course_id
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WHERE
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c.is_delete = 0
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<if test='null != wxShow and wxShow == 1'>
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AND c.wx_show = #{wxShow}
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</if>
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<if test='null != wxShow and wxShow == 2'>
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AND (c.wx_show = #{wxShow} OR c.wx_show IS NULL)
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</if>
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<if test='null != dyShow and dyShow == 1'>
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AND c.dy_show = #{dyShow}
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</if>
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<if test='null != dyShow and dyShow == 2'>
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AND (c.dy_show = #{dyShow} OR c.dy_show IS NULL)
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</if>
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<if test='null != title'>
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AND c.title LIKE CONCAT('%', #{title}, '%')
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</if>
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<if test='null != classifyId and classifyId != 0'>
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AND c.classify_id = #{classifyId}
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</if>
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<if test='null != bannerId and bannerId != 0'>
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AND c.banner_id = #{bannerId}
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</if>
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<if test="classifyId == 0">
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AND c.is_recommend = 1
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</if>
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<if test="over != null">
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AND c.is_over = #{over}
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</if>
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<if test="isRecommend != null and isRecommend != -1">
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AND gd.course_id IS NOT NULL
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</if>
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<if test="status != null and status != 0">
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AND c.status = #{status}
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</if>
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<if test="isPrice != null">
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AND c.is_price = #{isPrice}
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</if>
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<if test="wxCourse != null">
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AND c.wx_course_id IS NOT NULL
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</if>
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<if test="dyCourse != null">
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AND c.dy_status = 4
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</if>
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<if test="sort == null">
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ORDER BY c.sort ASC, c.create_time DESC
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</if>
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<if test="sort != null and sort == 1">
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ORDER BY goodNum DESC
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</if>
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<if test="sort != null and sort == 2">
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ORDER BY weekGoodNum DESC
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</if>;
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<!--
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SELECT
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c.classify_id as classifyId,
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c.course_id as courseId,
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@ -144,7 +39,7 @@
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c.dy_show as dyShow,
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c.sort,
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round(10000*rand(),0) as goodNum,
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(select count(*) from course_details d where d.course_id=c.course_id ) as courseDetailsCount,
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cd.course_details_count as courseDetailsCount, -- Replaced subquery with left join count
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null AS courseDetailsName,
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null AS courseDetailsId,
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round(10000*rand(),0) as weekGoodNum,
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@ -152,62 +47,170 @@
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FROM
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course AS c
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LEFT JOIN course_classification AS cc ON c.classify_id = cc.classification_id
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left join banner as b on b.id=c.banner_id
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LEFT JOIN banner AS b ON b.id = c.banner_id
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LEFT JOIN (
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SELECT
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course_id,
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COUNT(*) as course_details_count
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FROM
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course_details
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GROUP BY
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course_id
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) AS cd ON c.course_id = cd.course_id
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WHERE
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1 = 1
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AND c.is_delete = 0
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<if test='null != wxShow and wxShow==1'>
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and c.wx_show = #{wxShow}
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AND c.wx_show = #{wxShow}
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</if>
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<if test='null != wxShow and wxShow==2'>
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and (c.wx_show = #{wxShow} or c.wx_show is null)
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AND (c.wx_show = #{wxShow} OR c.wx_show IS NULL)
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</if>
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<if test='null != dyShow and dyShow==1'>
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and c.dy_show = #{dyShow}
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AND c.dy_show = #{dyShow}
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</if>
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<if test='null != dyShow and dyShow==2'>
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and (c.dy_show = #{dyShow} or c.dy_show is null)
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AND (c.dy_show = #{dyShow} OR c.dy_show IS NULL)
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</if>
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<if test='null != title'>
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and c.title LIKE CONCAT('%', #{title}, '%')
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AND c.title LIKE CONCAT('%', #{title}, '%')
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</if>
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<if test='null!= classifyId and classifyId!=0'>
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and c.classify_id = #{classifyId}
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<if test='null != classifyId and classifyId != 0'>
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AND c.classify_id = #{classifyId}
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</if>
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<if test='null!= bannerId and bannerId!=0'>
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and c.banner_id = #{bannerId}
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<if test='null != bannerId and bannerId != 0'>
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AND c.banner_id = #{bannerId}
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</if>
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<if test="classifyId==0">
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and c.is_recommend=1
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<if test="classifyId == 0">
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AND c.is_recommend = 1
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</if>
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<if test="over!=null">
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and c.is_over=#{over}
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<if test="over != null">
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AND c.is_over = #{over}
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</if>
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<if test="isRecommend!=null and isRecommend!=-1">
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and c.course_id in (select course_id from course_details where good=1)
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<if test="isRecommend != null and isRecommend != -1">
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AND c.course_id IN (SELECT course_id FROM course_details WHERE good = 1)
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</if>
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<if test="status!=null and status!=0">
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and c.status=#{status}
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<if test="status != null and status != 0">
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AND c.status = #{status}
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</if>
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<if test="isPrice!=null">
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and c.is_price=#{isPrice}
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<if test="isPrice != null">
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AND c.is_price = #{isPrice}
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</if>
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<if test="wxCourse!=null">
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and c.wx_course_id is not null
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<if test="wxCourse != null">
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AND c.wx_course_id IS NOT NULL
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</if>
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<if test="dyCourse!=null">
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and c.dy_status=4
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<if test="dyCourse != null">
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AND c.dy_status = 4
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</if>
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<if test="sort==null">
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order by c.sort asc,c.create_time desc
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<if test="sort == null">
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ORDER BY c.sort ASC, c.create_time DESC
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</if>
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<if test="sort!=null and sort==1">
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order by goodNum desc
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<if test="sort != null and sort == 1">
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ORDER BY goodNum DESC
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</if>
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<if test="sort!=null and sort==2">
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order by weekGoodNum desc
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<if test="sort != null and sort == 2">
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ORDER BY weekGoodNum DESC
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</if>
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-->
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<!--
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SELECT
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c.classify_id as classifyId,
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c.course_id as courseId,
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c.course_label as courseLabel,
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c.create_time createTime,
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c.details,
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c.img,
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c.banner_img as bannerImg,
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c.status,
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c.is_delete as isDelete,
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c.msg_type msgType,
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c.msg_url as msgUrl,
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c.pay_num as payNum,
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c.price,
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c.wholesale_price as wholesalePrice,
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c.is_over as isOver,
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c.title,
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c.is_price as isPrice,
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c.title_img as titleImg,
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c.update_time as updateTime,
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cc.classification_name as classificationName,
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c.course_type as courseType,
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c.banner_id as bannerId,
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b.name as bannerName,
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0 as viewCounts,
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c.dy_img_id as dyImgId,
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c.dy_course_id as dyCourseId,
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c.wx_course_id as wxCourseId,
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c.wx_show as wxShow,
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c.dy_show as dyShow,
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c.sort,
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round(10000*rand(),0) as goodNum,
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(select count(*) from course_details d where d.course_id=c.course_id ) as courseDetailsCount,
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null AS courseDetailsName,
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null AS courseDetailsId,
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round(10000*rand(),0) as weekGoodNum,
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0 as isRecommend
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FROM
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course AS c
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LEFT JOIN course_classification AS cc ON c.classify_id = cc.classification_id
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left join banner as b on b.id=c.banner_id
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WHERE
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1 = 1
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AND c.is_delete = 0
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<if test='null != wxShow and wxShow==1'>
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and c.wx_show = #{wxShow}
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</if>
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<if test='null != wxShow and wxShow==2'>
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and (c.wx_show = #{wxShow} or c.wx_show is null)
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</if>
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<if test='null != dyShow and dyShow==1'>
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and c.dy_show = #{dyShow}
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</if>
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<if test='null != dyShow and dyShow==2'>
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and (c.dy_show = #{dyShow} or c.dy_show is null)
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</if>
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<if test='null != title'>
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and c.title LIKE CONCAT('%', #{title}, '%')
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</if>
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<if test='null!= classifyId and classifyId!=0'>
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and c.classify_id = #{classifyId}
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</if>
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<if test='null!= bannerId and bannerId!=0'>
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and c.banner_id = #{bannerId}
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</if>
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<if test="classifyId==0">
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and c.is_recommend=1
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</if>
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<if test="over!=null">
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and c.is_over=#{over}
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</if>
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<if test="isRecommend!=null and isRecommend!=-1">
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and c.course_id in (select course_id from course_details where good=1)
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</if>
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<if test="status!=null and status!=0">
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and c.status=#{status}
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</if>
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<if test="isPrice!=null">
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and c.is_price=#{isPrice}
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</if>
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<if test="wxCourse!=null">
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and c.wx_course_id is not null
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</if>
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<if test="dyCourse!=null">
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and c.dy_status=4
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</if>
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<if test="sort==null">
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order by c.sort asc,c.create_time desc
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</if>
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<if test="sort!=null and sort==1">
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order by goodNum desc
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</if>
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<if test="sort!=null and sort==2">
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order by weekGoodNum desc
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</if>
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-->
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</select>
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<select id="selectCourseAdmin" resultType="Map">
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