Github user sun-rui commented on the pull request:
https://github.com/apache/spark/pull/9366#issuecomment-157297536
Yes, since R throws error message in this case, we can leave exception
un-handled. No need to verify all column types. User will get exception message
at
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/stat/StatFunctions.scala#L81
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