[GitHub] [spark] HyukjinKwon commented on a change in pull request #30257: [SPARK-33351][SQL] WithColumn should add a column in specific position

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HyukjinKwon commented on a change in pull request #30257:
URL: https://github.com/apache/spark/pull/30257#discussion_r517789970



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File path: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
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@@ -2387,11 +2387,19 @@ class Dataset[T] private[sql](
    */
   def withColumn(colName: String, col: Column): DataFrame = withColumns(Seq(colName), Seq(col))
 
+  /**
+   * Returns a new Dataset by adding a column at specific position or replacing the
+   * existing column that has the same name.
+   */
+  def withColumn(colName: String, col: Column, pos: Int): DataFrame =

Review comment:
       Not sure. I would just simply select.




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