Github user ueshin commented on a diff in the pull request: https://github.com/apache/spark/pull/22045#discussion_r210469494 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/higherOrderFunctions.scala --- @@ -497,6 +497,53 @@ case class ArrayAggregate( override def prettyName: String = "aggregate" } +/** + * Returns a map that applies the function to each value of the map. + */ +@ExpressionDescription( +usage = "_FUNC_(expr, func) - Transforms values in the map using the function.", +examples = """ --- End diff -- ditto.
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