Github user mukulmurthy commented on a diff in the pull request:
https://github.com/apache/spark/pull/21662#discussion_r199006582
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/UnsupportedOperationChecker.scala
---
@@ -315,8 +315,10 @@ object UnsupportedOperationChecker {
case GroupingSets(_, _, child, _) if child.isStreaming =>
throwError("GroupingSets is not supported on streaming
DataFrames/Datasets")
- case GlobalLimit(_, _) | LocalLimit(_, _) if
subPlan.children.forall(_.isStreaming) =>
- throwError("Limits are not supported on streaming
DataFrames/Datasets")
+ case GlobalLimit(_, _) | LocalLimit(_, _) if
+ subPlan.children.forall(_.isStreaming) && outputMode ==
InternalOutputModes.Update =>
--- End diff --
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