Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/12048#discussion_r58159893
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala ---
@@ -261,4 +246,90 @@ object Utils {
finalAndCompleteAggregate :: Nil
}
+
+ /**
+ * Plans a streaming aggregation using the following progression:
+ * - Partial Aggregation
+ * - Shuffle
+ * - Partial Merge (now there is at most 1 tuple per group)
+ * - StateStoreRestore (now there is 1 tuple from this batch +
optionally one from the previous)
+ * - PartialMerge (now there is at most 1 tuple per group)
+ * - StateStoreSave (saves the tuple for the next batch)
+ * - Complete (output the current result of the aggregation)
--- End diff --
is this Complete or Final?
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