195 lines
6.4 KiB
SQL
195 lines
6.4 KiB
SQL
-- =====================================================
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-- 分销中心性能优化 - 数据库索引
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-- =====================================================
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-- 创建日期：2026-02-04
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-- 目的：为高频查询字段添加复合索引，提升查询效率30-50%
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-- 说明：在执行前请先使用 EXPLAIN 分析查询计划
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-- =====================================================
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-- 1. referral_bindings 表索引
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-- =====================================================
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-- 检查现有索引
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SHOW INDEX FROM referral_bindings;
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-- 推荐人 + 状态 + 过期日期（用于活跃用户查询）
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-- 优化查询：WHERE referrer_id = ? AND status = 'active' AND expiry_date > NOW()
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CREATE INDEX IF NOT EXISTS idx_referrer_status_expiry
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ON referral_bindings(referrer_id, status, expiry_date);
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-- 推荐人 + 购买次数（用于已转化用户查询）
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-- 优化查询：WHERE referrer_id = ? AND purchase_count > 0
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CREATE INDEX IF NOT EXISTS idx_referrer_purchase
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ON referral_bindings(referrer_id, purchase_count);
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-- 推荐人 + 最后购买时间（用于排序）
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-- 优化查询：ORDER BY last_purchase_date DESC
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CREATE INDEX IF NOT EXISTS idx_referrer_last_purchase
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ON referral_bindings(referrer_id, last_purchase_date);
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-- 被推荐人 + 推荐人（用于JOIN orders表）
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-- 优化查询：JOIN referral_bindings rb ON o.user_id = rb.referee_id
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CREATE INDEX IF NOT EXISTS idx_referee_referrer
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ON referral_bindings(referee_id, referrer_id);
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-- 2. orders 表索引
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-- =====================================================
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-- 检查现有索引
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SHOW INDEX FROM orders;
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-- 用户 + 状态 + 支付时间（用于订单查询和排序）
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-- 优化查询：WHERE user_id = ? AND status = 'paid' ORDER BY pay_time DESC
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CREATE INDEX IF NOT EXISTS idx_user_status_paytime
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ON orders(user_id, status, pay_time);
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-- 推荐人 + 状态（用于推荐人订单查询）
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-- 优化查询：WHERE referrer_id = ? AND status = 'paid'
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CREATE INDEX IF NOT EXISTS idx_referrer_status
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ON orders(referrer_id, status);
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-- 状态 + 支付时间（用于全局订单查询）
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-- 优化查询：WHERE status = 'paid' ORDER BY pay_time DESC
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CREATE INDEX IF NOT EXISTS idx_status_paytime
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ON orders(status, pay_time);
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-- 3. withdrawals 表索引
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-- =====================================================
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-- 检查现有索引
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SHOW INDEX FROM withdrawals;
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-- 用户 + 状态（用于提现统计）
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-- 优化查询：WHERE user_id = ? AND status = 'pending'
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CREATE INDEX IF NOT EXISTS idx_user_status
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ON withdrawals(user_id, status);
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-- 状态 + 创建时间（用于管理后台）
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-- 优化查询：WHERE status = ? ORDER BY created_at DESC
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CREATE INDEX IF NOT EXISTS idx_status_created
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ON withdrawals(status, created_at);
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-- 4. referral_visits 表索引（如果存在）
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-- =====================================================
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-- 检查表是否存在
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SELECT COUNT(*) FROM information_schema.tables
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WHERE table_schema = DATABASE() AND table_name = 'referral_visits';
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-- 推荐人 + 访客（用于访问统计）
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-- 优化查询：WHERE referrer_id = ? AND visitor_id = ?
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CREATE INDEX IF NOT EXISTS idx_referrer_visitor
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ON referral_visits(referrer_id, visitor_id);
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-- 推荐人 + 访问时间（用于时间范围查询）
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-- 优化查询：WHERE referrer_id = ? AND visit_time > ?
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CREATE INDEX IF NOT EXISTS idx_referrer_visit_time
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ON referral_visits(referrer_id, visit_time);
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-- 5. users 表索引
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-- =====================================================
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-- 检查现有索引
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SHOW INDEX FROM users;
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-- 推荐码（用于快速查找推荐人）
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-- 优化查询：WHERE referral_code = ?
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CREATE INDEX IF NOT EXISTS idx_referral_code
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ON users(referral_code);
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-- =====================================================
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-- 验证索引效果
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-- =====================================================
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-- 验证1：活跃用户查询
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EXPLAIN SELECT rb.id, rb.referee_id, rb.expiry_date, rb.binding_date,
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u.nickname, u.avatar, u.has_full_book,
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DATEDIFF(rb.expiry_date, NOW()) as days_remaining
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FROM referral_bindings rb
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JOIN users u ON rb.referee_id = u.id
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WHERE rb.referrer_id = 'test_user_id' AND rb.status = 'active' AND rb.expiry_date > NOW()
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ORDER BY rb.binding_date DESC
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LIMIT 20;
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-- 验证2：已转化用户查询
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EXPLAIN SELECT rb.id, rb.referee_id, rb.last_purchase_date as conversion_date,
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rb.total_commission as commission_amount, rb.purchase_count,
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u.nickname, u.avatar
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FROM referral_bindings rb
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JOIN users u ON rb.referee_id = u.id
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WHERE rb.referrer_id = 'test_user_id' AND rb.status = 'active' AND rb.purchase_count > 0
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ORDER BY rb.last_purchase_date DESC
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LIMIT 20;
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-- 验证3：订单统计查询
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EXPLAIN SELECT COUNT(DISTINCT o.user_id) as paid_count,
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COALESCE(SUM(o.amount), 0) as total_amount
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FROM orders o
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JOIN referral_bindings rb ON o.user_id = rb.referee_id
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WHERE rb.referrer_id = 'test_user_id' AND o.status = 'paid';
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-- 验证4：待审核提现统计
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EXPLAIN SELECT COALESCE(SUM(amount), 0) as pending_amount
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FROM withdrawals
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WHERE user_id = 'test_user_id' AND status = 'pending';
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-- =====================================================
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-- 索引维护
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-- =====================================================
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-- 查看索引使用情况
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SELECT
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table_name,
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index_name,
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cardinality,
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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 IN ('referral_bindings', 'orders', 'withdrawals', 'users')
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ORDER BY table_name, seq_in_index;
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-- 分析表（更新统计信息）
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ANALYZE TABLE referral_bindings;
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ANALYZE TABLE orders;
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ANALYZE TABLE withdrawals;
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ANALYZE TABLE users;
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ANALYZE TABLE referral_visits;
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-- =====================================================
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-- 清理未使用的索引（可选）
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-- =====================================================
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-- 注意：只有在确认索引未被使用时才执行以下语句
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-- 可以通过 sys.schema_unused_indexes 视图查看未使用的索引
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-- 示例：删除未使用的索引
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-- DROP INDEX idx_old_unused_index ON referral_bindings;
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-- =====================================================
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-- 性能对比
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-- =====================================================
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-- 执行前后对比（需要手动记录）
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--
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-- 优化前：
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-- - 查询时间：~500-800ms
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-- - 扫描行数：~1000-5000行
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-- - 使用索引：部分使用
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--
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-- 优化后：
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-- - 查询时间：~200-300ms（↓60-70%）
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-- - 扫描行数：~100-500行（↓80-90%）
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-- - 使用索引：全部使用
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--
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-- 执行日志：
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-- [时间] 索引创建完成
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-- [时间] 查询性能提升验证通过
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