mgaido91 commented on a change in pull request #23285: [SPARK-26224][SQL] Avoid
creating many project on subsequent calls to withColumn
URL: https://github.com/apache/spark/pull/23285#discussion_r240605608
##########
File path: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
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@@ -2146,7 +2146,7 @@ class Dataset[T] private[sql](
* Returns a new Dataset by adding columns or replacing the existing columns
that has
* the same names.
*/
- private[spark] def withColumns(colNames: Seq[String], cols: Seq[Column]):
DataFrame = {
+ private[spark] def withColumns(colNames: Seq[String], cols: Seq[Column]):
DataFrame = withPlan {
Review comment:
yes, but I think this is a special case. I have seen many cases when
`withColumn` is used in for loops: with this change such a pattern would be
better supported.
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