HyukjinKwon commented on a change in pull request #27499: [SPARK-30590][SQL]
Untyped select API cannot take typed column expression
URL: https://github.com/apache/spark/pull/27499#discussion_r377460627
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File path: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
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@@ -1430,6 +1430,11 @@ class Dataset[T] private[sql](
*/
@scala.annotation.varargs
def select(cols: Column*): DataFrame = withPlan {
Review comment:
Hm.. I see. So to support typed columns properly, we should either expose
`selectUntyped` or make all cases for `def select[U1, ...](` ..
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