-- crypto_binance_data表索引优化脚本
-- 针对500万+数据量的查询性能优化

-- 1. 主要查询索引 - 覆盖最常见的查询模式
-- 支持: WHERE symbol = ? AND bar = ? ORDER BY timestamp
CREATE INDEX idx_symbol_bar_timestamp ON crypto_binance_data (symbol, bar, timestamp);

-- 2. 时间范围查询索引 - 优化时间范围查询
-- 支持: WHERE symbol = ? AND bar = ? AND timestamp BETWEEN ? AND ?
CREATE INDEX idx_symbol_bar_timestamp_range ON crypto_binance_data (symbol, bar, timestamp);

-- 3. 按symbol分组查询索引 - 优化GROUP BY symbol查询
-- 支持: GROUP BY symbol, bar
CREATE INDEX idx_symbol_bar ON crypto_binance_data (symbol, bar);

-- 4. 时间戳排序索引 - 优化ORDER BY timestamp查询
-- 支持: ORDER BY timestamp DESC/ASC
CREATE INDEX idx_timestamp ON crypto_binance_data (timestamp);

-- 5. 技术指标查询索引 - 优化技术指标相关查询
-- 支持: WHERE symbol = ? AND bar = ? AND macd_signal = ?
CREATE INDEX idx_symbol_bar_macd_signal ON crypto_binance_data (symbol, bar, macd_signal);

-- 支持: WHERE symbol = ? AND bar = ? AND kdj_signal = ?
CREATE INDEX idx_symbol_bar_kdj_signal ON crypto_binance_data (symbol, bar, kdj_signal);

-- 支持: WHERE symbol = ? AND bar = ? AND rsi_signal = ?
CREATE INDEX idx_symbol_bar_rsi_signal ON crypto_binance_data (symbol, bar, rsi_signal);

-- 支持: WHERE symbol = ? AND bar = ? AND boll_signal = ?
CREATE INDEX idx_symbol_bar_boll_signal ON crypto_binance_data (symbol, bar, boll_signal);

-- 支持: WHERE symbol = ? AND bar = ? AND ma_cross = ?
CREATE INDEX idx_symbol_bar_ma_cross ON crypto_binance_data (symbol, bar, ma_cross);

-- 6. 复合技术指标查询索引 - 优化多条件技术指标查询
-- 支持: WHERE symbol = ? AND bar = ? AND macd_signal = ? AND kdj_signal = ?
CREATE INDEX idx_symbol_bar_macd_kdj ON crypto_binance_data (symbol, bar, macd_signal, kdj_signal);

-- 7. 日期时间查询索引 - 优化按日期时间查询
-- 支持: WHERE date_time >= ? AND date_time <= ?
CREATE INDEX idx_date_time ON crypto_binance_data (date_time);

-- 8. 交易对时间索引 - 优化特定交易对的时间查询
-- 支持: WHERE symbol = ? ORDER BY timestamp
CREATE INDEX idx_symbol_timestamp ON crypto_binance_data (symbol, timestamp);

-- 9. 周期时间索引 - 优化特定周期的时间查询
-- 支持: WHERE bar = ? ORDER BY timestamp
CREATE INDEX idx_bar_timestamp ON crypto_binance_data (bar, timestamp);

-- 10. 统计查询优化索引 - 优化COUNT, AVG等聚合查询
-- 支持: SELECT COUNT(*) FROM crypto_binance_data WHERE symbol = ? AND bar = ?
CREATE INDEX idx_symbol_bar_volume ON crypto_binance_data (symbol, bar, volume);

-- 11. 价格相关查询索引 - 优化价格相关查询
-- 支持: WHERE symbol = ? AND bar = ? AND close > ? AND close < ?
CREATE INDEX idx_symbol_bar_close ON crypto_binance_data (symbol, bar, close);

-- 12. 成交量相关查询索引 - 优化成交量相关查询
-- 支持: WHERE symbol = ? AND bar = ? AND volume > ?
CREATE INDEX idx_symbol_bar_volume_high ON crypto_binance_data (symbol, bar, volume);

-- 删除可能存在的重复或低效索引
-- 注意：在实际执行前请先检查现有索引，避免删除正在使用的索引

-- 查看当前索引状态
-- SHOW INDEX FROM crypto_binance_data;

-- 分析查询性能
-- EXPLAIN SELECT * FROM crypto_binance_data WHERE symbol = 'BTC-USDT' AND bar = '5m' ORDER BY timestamp DESC LIMIT 100;