131 lines
4.4 KiB
SQL
131 lines
4.4 KiB
SQL
-- ================================================
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-- 验证优化是否成功执行
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-- ================================================
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USE study;
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-- ================================================
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-- 1. 检查 student_class 表的冗余索引是否已删除
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-- ================================================
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SELECT '=== 检查 student_class 表索引 ===' AS info;
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SELECT INDEX_NAME, COLUMN_NAME, SEQ_IN_INDEX, NON_UNIQUE
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study'
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AND TABLE_NAME = 'student_class'
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ORDER BY INDEX_NAME, SEQ_IN_INDEX;
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-- 检查 idx_student_id 是否存在
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SELECT CASE
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WHEN COUNT(*) > 0 THEN '❌ idx_student_id 仍然存在！需要手动删除！'
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ELSE '✅ idx_student_id 已成功删除'
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END AS result
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study'
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AND TABLE_NAME = 'student_class'
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AND INDEX_NAME = 'idx_student_id';
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-- ================================================
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-- 2. 检查 sys_user_role 表索引
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-- ================================================
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SELECT '=== 检查 sys_user_role 表索引 ===' AS info;
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SELECT INDEX_NAME, COLUMN_NAME, SEQ_IN_INDEX
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study'
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AND TABLE_NAME = 'sys_user_role'
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ORDER BY INDEX_NAME, SEQ_IN_INDEX;
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-- 检查必要的索引是否存在
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SELECT CASE
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WHEN (SELECT COUNT(*) FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study' AND TABLE_NAME = 'sys_user_role'
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AND INDEX_NAME = 'idx_user_id') > 0
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THEN '✅ idx_user_id 存在'
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ELSE '❌ idx_user_id 不存在！需要创建！'
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END AS user_id_index;
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SELECT CASE
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WHEN (SELECT COUNT(*) FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study' AND TABLE_NAME = 'sys_user_role'
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AND INDEX_NAME = 'idx_role_id') > 0
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THEN '✅ idx_role_id 存在'
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ELSE '❌ idx_role_id 不存在！需要创建！'
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END AS role_id_index;
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-- ================================================
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-- 3. 检查 courseware 表索引
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-- ================================================
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SELECT '=== 检查 courseware 表索引 ===' AS info;
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SELECT INDEX_NAME, COLUMN_NAME, SEQ_IN_INDEX
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study'
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AND TABLE_NAME = 'courseware'
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ORDER BY INDEX_NAME, SEQ_IN_INDEX;
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SELECT CASE
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WHEN (SELECT COUNT(*) FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study' AND TABLE_NAME = 'courseware'
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AND INDEX_NAME = 'idx_course_id') > 0
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THEN '✅ idx_course_id 存在'
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ELSE '❌ idx_course_id 不存在！需要创建！'
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END AS course_id_index;
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-- ================================================
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-- 4. 检查 learning_detail 表索引
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-- ================================================
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SELECT '=== 检查 learning_detail 表索引 ===' AS info;
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SELECT INDEX_NAME, COLUMN_NAME, SEQ_IN_INDEX
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study'
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AND TABLE_NAME = 'learning_detail'
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ORDER BY INDEX_NAME, SEQ_IN_INDEX;
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SELECT CASE
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WHEN (SELECT COUNT(*) FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = 'study' AND TABLE_NAME = 'learning_detail'
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AND INDEX_NAME = 'idx_student_course') > 0
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THEN '✅ idx_student_course 存在'
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ELSE '❌ idx_student_course 不存在！需要创建！'
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END AS student_course_index;
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-- ================================================
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-- 5. 测试查询性能
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-- ================================================
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SELECT '=== 测试查询性能 ===' AS info;
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-- 测试角色查询
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SET @start = NOW(6);
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SELECT COUNT(*) FROM sys_user_role WHERE user_id = 455;
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SET @end = NOW(6);
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SELECT TIMESTAMPDIFF(MICROSECOND, @start, @end)/1000 AS '角色查询耗时(ms)';
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-- 测试课程查询
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SET @start = NOW(6);
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SELECT COUNT(*) FROM courseware WHERE course_id = 6;
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SET @end = NOW(6);
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SELECT TIMESTAMPDIFF(MICROSECOND, @start, @end)/1000 AS '课程查询耗时(ms)';
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-- 测试学习详情查询
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SET @start = NOW(6);
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SELECT COUNT(*) FROM learning_detail WHERE student_id = 9999 AND course_id = 6;
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SET @end = NOW(6);
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SELECT TIMESTAMPDIFF(MICROSECOND, @start, @end)/1000 AS '学习详情查询耗时(ms)';
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-- ================================================
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-- 6. 显示结论
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-- ================================================
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SELECT '=== 优化结果总结 ===' AS info;
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SELECT
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'如果所有索引都是 ✅，且查询耗时 <50ms，则优化成功！' AS '结论',
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'如果有 ❌，请查看下面的手动修复SQL' AS '说明';
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