tdas commented on a change in pull request #33336:
URL: https://github.com/apache/spark/pull/33336#discussion_r670809632
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/FlatMapGroupsWithStateExec.scala
##########
@@ -404,3 +402,72 @@ case class FlatMapGroupsWithStateExec(
copy(child = newLeft, initialState = newRight)
}
+object FlatMapGroupsWithStateExec {
+
+ def foundDuplicateInitialKeyException(): Exception = {
+ throw new IllegalArgumentException("The initial state provided contained "
+
+ "multiple rows(state) with the same key. Make sure to de-duplicate the "
+
+ "initial state before passing it.")
+ }
+
+ /**
+ * Special handling for when the child relation is a batch relation.
Review comment:
what is the handling here? the doc should say plan logical
flatmapGroupsWIthState for batch queries.
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