Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/22889#discussion_r230571447
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala ---
@@ -883,6 +883,31 @@ class Dataset[T] private[sql](
join(right, Seq(usingColumn))
}
+ /**
+ * Equi-join with another `DataFrame` using the given column.
--- End diff --
Please fix the indentation here.
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