Github user wzhfy commented on a diff in the pull request:
https://github.com/apache/spark/pull/14712#discussion_r75450024
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
---
@@ -95,6 +95,12 @@ abstract class LogicalPlan extends
QueryPlan[LogicalPlan] with Logging {
}
/**
+ * Estimate complete [[Statistics]] for this plan. Each plan need to
override this to get
+ * complete statistics.
+ */
+ def completeStats: Statistics = statistics
--- End diff --
ok, i've updated this pr based on your comments
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