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                            * 臨時函數僅對當前 session(黑窗口)有效，一旦退出 HIVE 客戶端，自定義臨時函數自動被刪除。
* 臨時函數在所有的數據庫中都有效

按照【自定義Hive函數流程】將jar包添加到Hive的class path路徑上后，當在Hive使用`create temporary`關鍵字定義函數時，則該函數就是臨時函數。
```sql
######### 創建自定義臨時函數 ############
0: jdbc:hive2://hadoop101:10000> create temporary function my_lower as 'udf.Str2Lower';
No rows affected (0.02 seconds)

######### 刪除自定義臨時函數 ############
hive (test)> drop temporary function  my_lower;
```

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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