xinrong-databricks edited a comment on pull request #32821:
URL: https://github.com/apache/spark/pull/32821#issuecomment-856915919


   As the ticket description says, the motivation to introduce DecimalType is 
that DoubleType and FloatType could have NaN, whereas DecimalType could not.
   Would you consider moving null checks methods to DataTypeOps?
   An example method would be  
https://github.com/apache/spark/blob/master/python/pyspark/pandas/base.py#L956 
? @Yikun 
   Thank you!


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