Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/19570#discussion_r147118974 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala --- @@ -1753,6 +1753,27 @@ class Dataset[T] private[sql]( * * Also as standard in SQL, this function resolves columns by position (not by name). * + * Notice that the column positions in the schema aren't necessarily matched with the + * fields in the typed objects in a Dataset. This function resolves columns by their positions + * in the schema, not the fields in the typed objects: + * + * {{{ + * case class Test(a : String, b : String) --- End diff -- Yes, thanks.
--- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org