Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/17175#discussion_r105529199
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryTableScanExec.scala
---
@@ -42,10 +42,34 @@ case class InMemoryTableScanExec(
override def output: Seq[Attribute] = attributes
// The cached version does not change the outputPartitioning of the
original SparkPlan.
- override def outputPartitioning: Partitioning =
relation.child.outputPartitioning
+ // But the cached version could alias output, so we need to replace
output.
+ override def outputPartitioning: Partitioning = {
--- End diff --
Oh. Do you mean only keeping the change of `InMemoryTableScanExec`?
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