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                            矢量查詢(Vectorized query) 每次處理數據時會將1024行數據組成一個batch進行處理，而不是一行一行進行處理，這樣能夠顯著提高執行速度。
```sql
-- 開啟矢量化
set hive.vectorized.execution.enabled = true; 
set hive.vectorized.execution.reduce.enabled = true;
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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