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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