Github user EntilZha commented on the pull request:

    https://github.com/apache/spark/pull/7580#issuecomment-124722152
  
    Any thoughts on the python error @rxin or @chenghao-intel? I am going to 
start digging a little bit to see if I can find where this is occurring. 
Primary questions are
    1. Is this an issue that changes in python code can change? Namely, python 
would have to be responsible for some amount of type coercion between numeric 
types
    2. Another option would be to deviate from hive and be more flexible about 
allowing implicit type conversions. Based on the implicit conversion code 
though, that would be too general/liberal with conversions, while 
`ExpectsInputTypes` seems to be not loose enough if the python code can't be 
changed.


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