cloud-fan commented on code in PR #54014:
URL: https://github.com/apache/spark/pull/54014#discussion_r2752362758
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sql/api/src/main/scala/org/apache/spark/sql/Dataset.scala:
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@@ -2010,6 +2010,33 @@ abstract class Dataset[T] extends Serializable {
*/
def exceptAll(other: Dataset[T]): Dataset[T]
+ /**
+ * Returns a new [[Dataset]] by appending a column containing consecutive
0-based Long indices,
+ * similar to `RDD.zipWithIndex()`.
+ *
+ * The index column is appended as the last column of the resulting
[[DataFrame]].
+ *
+ * @group typedrel
+ * @since 4.2.0
+ */
+ def zipWithIndex(): DataFrame = zipWithIndex("index")
+
+ /**
+ * Returns a new [[Dataset]] by appending a column containing consecutive
0-based Long indices,
+ * similar to `RDD.zipWithIndex()`.
+ *
+ * The index column is appended as the last column of the resulting
[[DataFrame]].
+ *
+ * @param indexColName
+ * The name of the index column to append. The dataset must not already
contain a column with
+ * this name.
+ * @throws AnalysisException
+ * if a column with `indexColName` already exists in the schema.
Review Comment:
This makes sense to me, and we can relax it later if needed.
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