Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/17174
Thanks for investigation. This is definitely very useful to the other Spark
users. Maybe you can make a change the existing document
http://spark.apache.org/docs/latest/sql-programming-guide.html and explain our
implicit type casting?
So far, we do not have a perfect solution to avoid external behavior
changes, if we use your changes.
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