Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/22428#discussion_r217937566
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -2300,6 +2300,37 @@ class Dataset[T] private[sql](
}
}
+ /**
+ * Returns a new Dataset with columns renamed.
+ * This is a no-op if schema doesn't contain existingNames in columnMap.
+ * {{{
+ * df.withColumnRenamed(Map(
+ * "c1" -> "first_column",
+ * "c2" -> "second_column"
+ * ))
+ * }}}
+ *
+ * @group untypedrel
+ * @since 2.4.0
--- End diff --
branch-2.4 is cut out. We will probably target 3.0.0 if we happen to add
new APIs.
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