tdas commented on a change in pull request #33093:
URL: https://github.com/apache/spark/pull/33093#discussion_r661562142
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/FlatMapGroupsWithStateExec.scala
##########
@@ -178,6 +257,47 @@ case class FlatMapGroupsWithStateExec(
}
}
+ /**
+ * Process the new data iterator along with the initial state. The initial
state is applied
+ * before processing the new data for every key. The user defined function
is called only
+ * once on the data.
+ */
+ def processNewDataWithInitState(
+ childDataIter: Iterator[InternalRow],
+ initStateIter: Iterator[InternalRow]
+ ): Iterator[InternalRow] = {
+
Review comment:
add more inline docs explaining the steps here
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