Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/17175#discussion_r105588851
--- 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 = {
+ val attrMap = AttributeMap(
+ relation.child.output.zip(output)
+ )
+ relation.child.outputPartitioning match {
+ case HashPartitioning(expressions, numPartitions) =>
--- End diff --
OK. Will update.
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