Github user jaceklaskowski commented on a diff in the pull request:
https://github.com/apache/spark/pull/18074#discussion_r118436041
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/RelationalGroupedDataset.scala ---
@@ -35,12 +35,13 @@ import org.apache.spark.sql.types.NumericType
import org.apache.spark.sql.types.StructType
/**
- * A set of methods for aggregations on a `DataFrame`, created by
`Dataset.groupBy`.
+ * A set of methods for aggregations on a `DataFrame`, created by
[[Dataset#groupBy groupBy]],
+ * [[Dataset#cube cube]] or [[Dataset#rollup rollup]] (and also [[pivot]]).
*
- * The main method is the agg function, which has multiple variants. This
class also contains
- * convenience some first order statistics such as mean, sum for
convenience.
+ * The main method is the [[agg]] function, which has multiple variants.
This class also contains
--- End diff --
No scaladoc. I was focused on javadoc and seems I missed it. Fixed.
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