Github user wangyum commented on the issue:

    https://github.com/apache/spark/pull/19831
  
    Yes, I saw some of these tables in my cluster, but the user did not 
manually modify this parameter:
    ```
    # Detailed Table Information                
    Database    dw      
    Table       prod    
    Owner       bi      
    Created Time        Tue Nov 03 16:33:52 CST 2015    
    Last Access Thu Jan 01 08:00:00 CST 1970    
    Created By  Spark 2.2 or prior      
    Type        EXTERNAL        
    Provider    hive    
    Comment     Product list    
    Table Properties    [transient_lastDdlTime=1508260780, 
last_modified_time=1473154014, last_modified_by=bi]  
    Statistics  26596461123 bytes, 0 rows       
    Location    viewfs://cluster9/user/hive/warehouse/dw.db/prod        
    Serde Library       org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe      
    InputFormat org.apache.hadoop.mapred.TextInputFormat        
    OutputFormat        
org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat      
    Storage Properties  [serialization.format=1]        
    Partition Provider  Catalog 
    Time taken: 1.241 seconds, Fetched 70 row(s)
    ```


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