HyukjinKwon commented on issue #23184: [SPARK-26227][R] from_[csv|json] should accept schema_of_[csv|json] in R API URL: https://github.com/apache/spark/pull/23184#issuecomment-450704499 Yea, Scala side change is already made about `from_[csv|json](schema_of_[csv|json]())`. However, about https://github.com/apache/spark/pull/23184#discussion_r244296221 and https://github.com/apache/spark/pull/23184#discussion_r244295745, yea, the signatures are not consistent .. One possibility that was considered before is to match it to only use `Column` across API (vaguely talked with Wenchen in .. somewhere of a PR before), but it's too breaking change.. There's concern that `functions.scala` file is getting too long so it's been avoided to add overriden versions of such APIs. I think we should handle this problem for whole APIs later ..
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