HyukjinKwon commented on a change in pull request #22428: [SPARK-25430][SQL]
Add map parameter for withColumnRenamed
URL: https://github.com/apache/spark/pull/22428#discussion_r247317731
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File path: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
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@@ -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 3.0.0
+ */
+ def withColumnRenamed(columnMap: Map[String, String]): DataFrame = {
Review comment:
Btw this won't support java's map.
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