Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/16481#discussion_r95715805 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSource.scala --- @@ -413,17 +413,22 @@ case class DataSource( relation } - /** Writes the given [[DataFrame]] out to this [[DataSource]]. */ + /** + * Writes the given [[DataFrame]] out to this [[DataSource]]. + * + * @param isForWriteOnly Whether to just write the data without returning a [[BaseRelation]]. + */ def write( --- End diff -- let's create a new `write` method that returns `Unit`, and rename this `write` to `writeAndRead`, which should be removed eventually.
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