Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/2262#discussion_r17096863
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala ---
@@ -97,6 +97,7 @@ case class Limit(limit: Int, child: SparkPlan)
// partition local limit -> exchange into one partition -> partition
local limit again
override def output = child.output
+ override def outputPartitioning = SinglePartition
--- End diff --
`SinglePartition` for `LIMIT` may cause performance issue for large number
of records(in multiple partitions), do we really need to change this?
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