Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/13286#discussion_r64796991
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StatefulAggregate.scala
---
@@ -82,40 +82,62 @@ case class StateStoreRestoreExec(
case class StateStoreSaveExec(
keyExpressions: Seq[Attribute],
stateId: Option[OperatorStateId],
+ returnAllStates: Option[Boolean],
--- End diff --
Similar to stateId, it is injected later after creation of the physical
Spark plan, and before execution. See IncrementalExecution, and how stateId is
injected using the prepare rule.
I agree that this structure is something we can improve, but that would
require quite a bit of refactoring and better done later.
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