turboFei commented on issue #27150: SPARK-30471: Fix issue when comparing 
String and IntegerType
URL: https://github.com/apache/spark/pull/27150#issuecomment-572624053
 
 
   Double.Max is 1.7976931348623157E308.
   For mysql:
   
![image](https://user-images.githubusercontent.com/6757692/72082549-4ca21880-333b-11ea-85f8-8ff2269befc5.png)
   
   For teradata:
   
![image](https://user-images.githubusercontent.com/6757692/72082582-5af03480-333b-11ea-8562-20135d65ba80.png)
   
   May be teradata cast string to double.
   And mysql cast it as a more wild numeric type.
   

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