优化工作-1
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-- ============================================
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-- 数据库索引优化迁移
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-- 创建时间: 2026-06-05
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-- 目的: 优化高频查询的性能
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-- ============================================
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SET NAMES utf8mb4;
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-- -------------------------------------------
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-- 1. 订单状态+创建时间复合索引
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-- 用途: 后台订单管理、用户订单列表按时间排序
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-- 场景: SELECT * FROM rental_orders WHERE status = ? ORDER BY created_at DESC
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-- -------------------------------------------
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ALTER TABLE rental_orders
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ADD INDEX idx_rental_orders_status_created_at (status, created_at DESC);
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-- -------------------------------------------
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-- 2. 钱包流水按用户+业务类型+时间查询
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-- 用途: 用户查看特定类型的流水记录
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-- 场景: SELECT * FROM wallet_ledger WHERE user_id = ? AND biz_type = ? ORDER BY created_at DESC
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-- -------------------------------------------
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ALTER TABLE wallet_ledger
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ADD INDEX idx_wallet_ledger_user_biz_created (user_id, biz_type, created_at DESC);
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-- -------------------------------------------
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-- 3. 订单结算状态查询优化
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-- 用途: 查询待结算订单、按号主查询结算记录
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-- 场景: SELECT * FROM rental_orders WHERE settlement_status = ? AND owner_id = ? ORDER BY created_at
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-- -------------------------------------------
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ALTER TABLE rental_orders
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ADD INDEX idx_rental_orders_settlement (settlement_status, owner_id, created_at);
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-- -------------------------------------------
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-- 4. 商品发布时间查询优化
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-- 用途: 首页商品列表按发布时间排序
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-- 场景: SELECT * FROM rental_listings WHERE status = 'active' AND review_status = 'approved' ORDER BY published_at DESC
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-- 注意: 使用部分索引（MySQL 8.0+）只索引可用商品
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-- -------------------------------------------
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ALTER TABLE rental_listings
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ADD INDEX idx_rental_listings_published (status, review_status, published_at DESC);
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-- 如果需要进一步优化，可以考虑添加 in_transaction 列
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-- 但当前索引已经足够覆盖大部分查询
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-- -------------------------------------------
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-- 5. 用户实名认证状态查询
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-- 用途: 查询未实名用户、查询活跃且已实名用户
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-- 场景: SELECT * FROM users WHERE realname_status = 'verified' AND status = 'active'
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-- -------------------------------------------
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ALTER TABLE users
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ADD INDEX idx_users_realname_status (realname_status, status);
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-- ============================================
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-- 索引创建完成
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-- ============================================
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-- 验证索引创建情况（可选，用于开发环境验证）
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-- SHOW INDEX FROM rental_orders WHERE Key_name LIKE 'idx_rental_orders_%';
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-- SHOW INDEX FROM wallet_ledger WHERE Key_name LIKE 'idx_wallet_ledger_%';
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-- SHOW INDEX FROM rental_listings WHERE Key_name LIKE 'idx_rental_listings_%';
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-- SHOW INDEX FROM users WHERE Key_name LIKE 'idx_users_%';
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-- ============================================
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-- 数据库索引性能测试脚本
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-- 用途: 对比索引创建前后的查询性能
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-- 使用方法: mysql -u root -p hfb_sys < test_index_performance.sql
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-- ============================================
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SET NAMES utf8mb4;
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-- 关闭查询缓存，确保测试准确性
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SET SESSION query_cache_type = OFF;
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-- 开启性能分析
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SET profiling = 1;
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-- ============================================
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-- 测试 1: 订单状态+创建时间查询
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-- ============================================
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-- 清空缓冲区
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RESET QUERY CACHE;
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-- 查看执行计划
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EXPLAIN SELECT * FROM rental_orders
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WHERE status = 'active'
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ORDER BY created_at DESC
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LIMIT 20\G
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-- 执行查询并记录时间
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SELECT '测试 1: 订单状态+创建时间查询' AS test_name;
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SELECT * FROM rental_orders
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WHERE status = 'active'
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ORDER BY created_at DESC
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LIMIT 20;
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-- ============================================
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-- 测试 2: 钱包流水按用户+业务类型查询
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-- ============================================
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RESET QUERY CACHE;
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EXPLAIN SELECT * FROM wallet_ledger
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WHERE user_id = 1 AND biz_type = 'order_payment'
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ORDER BY created_at DESC
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LIMIT 20\G
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SELECT '测试 2: 钱包流水按用户+业务类型查询' AS test_name;
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SELECT * FROM wallet_ledger
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WHERE user_id = 1 AND biz_type = 'order_payment'
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ORDER BY created_at DESC
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LIMIT 20;
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-- ============================================
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-- 测试 3: 订单结算状态查询
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-- ============================================
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RESET QUERY CACHE;
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EXPLAIN SELECT * FROM rental_orders
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WHERE settlement_status = 'unsettled' AND owner_id = 1
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ORDER BY created_at
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LIMIT 20\G
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SELECT '测试 3: 订单结算状态查询' AS test_name;
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SELECT * FROM rental_orders
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WHERE settlement_status = 'unsettled' AND owner_id = 1
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ORDER BY created_at
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LIMIT 20;
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-- ============================================
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-- 测试 4: 商品发布时间查询
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-- ============================================
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RESET QUERY CACHE;
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EXPLAIN SELECT * FROM rental_listings
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WHERE status = 'active' AND review_status = 'approved'
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ORDER BY published_at DESC
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LIMIT 20\G
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SELECT '测试 4: 商品发布时间查询' AS test_name;
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SELECT * FROM rental_listings
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WHERE status = 'active' AND review_status = 'approved'
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ORDER BY published_at DESC
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LIMIT 20;
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-- ============================================
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-- 测试 5: 用户实名认证状态查询
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-- ============================================
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RESET QUERY CACHE;
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EXPLAIN SELECT * FROM users
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WHERE realname_status = 'verified' AND status = 'active'
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LIMIT 100\G
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SELECT '测试 5: 用户实名认证状态查询' AS test_name;
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SELECT COUNT(*) FROM users
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WHERE realname_status = 'verified' AND status = 'active';
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-- ============================================
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-- 显示性能分析结果
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-- ============================================
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-- 显示所有查询的性能概览
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SELECT '性能测试结果' AS title;
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SHOW PROFILES;
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-- ============================================
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-- 索引使用情况检查
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-- ============================================
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SELECT '索引使用情况检查' AS title;
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-- 检查新增索引是否存在
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SELECT
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TABLE_NAME,
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INDEX_NAME,
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GROUP_CONCAT(COLUMN_NAME ORDER BY SEQ_IN_INDEX) AS columns
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = DATABASE()
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AND INDEX_NAME IN (
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'idx_rental_orders_status_created_at',
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'idx_wallet_ledger_user_biz_created',
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'idx_rental_orders_settlement',
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'idx_rental_listings_published',
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'idx_users_realname_status'
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)
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GROUP BY TABLE_NAME, INDEX_NAME
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ORDER BY TABLE_NAME, INDEX_NAME;
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-- ============================================
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-- 慢查询统计
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-- ============================================
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SELECT '慢查询统计' AS title;
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SHOW GLOBAL STATUS LIKE 'Slow_queries';
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-- ============================================
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-- 索引基数检查（检查索引选择性）
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-- ============================================
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SELECT '索引基数检查' AS title;
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-- rental_orders 表索引基数
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SELECT
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INDEX_NAME,
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SEQ_IN_INDEX,
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COLUMN_NAME,
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CARDINALITY,
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SUB_PART,
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NULLABLE
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'rental_orders'
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AND INDEX_NAME LIKE 'idx_%'
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ORDER BY INDEX_NAME, SEQ_IN_INDEX;
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-- wallet_ledger 表索引基数
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SELECT
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INDEX_NAME,
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SEQ_IN_INDEX,
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COLUMN_NAME,
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CARDINALITY,
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SUB_PART,
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NULLABLE
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FROM information_schema.STATISTICS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'wallet_ledger'
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AND INDEX_NAME LIKE 'idx_%'
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ORDER BY INDEX_NAME, SEQ_IN_INDEX;
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-- ============================================
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-- 表统计信息
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-- ============================================
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SELECT '表统计信息' AS title;
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SELECT
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TABLE_NAME,
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TABLE_ROWS,
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AVG_ROW_LENGTH,
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DATA_LENGTH,
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INDEX_LENGTH,
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ROUND(DATA_LENGTH / 1024 / 1024, 2) AS data_mb,
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ROUND(INDEX_LENGTH / 1024 / 1024, 2) AS index_mb,
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ROUND((DATA_LENGTH + INDEX_LENGTH) / 1024 / 1024, 2) AS total_mb
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FROM information_schema.TABLES
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME IN ('rental_orders', 'wallet_ledger', 'rental_listings', 'users')
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ORDER BY TABLE_NAME;
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-- ============================================
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-- 测试完成
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-- ============================================
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SELECT '索引性能测试完成！' AS message;
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SELECT '请查看 SHOW PROFILES 的结果，对比优化前后的查询时间' AS tips;
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-- 关闭性能分析
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SET profiling = 0;
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