anishshri-db commented on code in PR #47133:
URL: https://github.com/apache/spark/pull/47133#discussion_r1681555704
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sql/core/src/main/scala/org/apache/spark/sql/RelationalGroupedDataset.scala:
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@@ -725,6 +725,43 @@ class RelationalGroupedDataset protected[sql](
Dataset.ofRows(df.sparkSession, plan)
}
+ /**
+ * Applies a grouped vectorized python user-defined function to each group
of data.
+ * The user-defined function defines a transformation: iterator of
`pandas.DataFrame` ->
+ * iterator of `pandas.DataFrame`.
+ * For each group, all elements in the group are passed as an iterator of
`pandas.DataFrame`
+ * along with corresponding state, and the results for all groups are
combined into a new
+ * [[DataFrame]].
+ *
+ *
Review Comment:
nit: extra newline ?
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