Github user zuowang commented on a diff in the pull request:
https://github.com/apache/spark/pull/11508#discussion_r55034146
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
---
@@ -320,8 +321,14 @@ abstract class UnaryNode extends LogicalPlan {
override def statistics: Statistics = {
// There should be some overhead in Row object, the size should not be
zero when there is
// no columns, this help to prevent divide-by-zero error.
- val childRowSize = child.output.map(_.dataType.defaultSize).sum + 8
- val outputRowSize = output.map(_.dataType.defaultSize).sum + 8
+ val childRowSize = child.output.map(n => n.dataType match {
--- End diff --
Done. Thanks!
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