Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/13505#discussion_r65795007
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
---
@@ -296,7 +296,7 @@ abstract class QueryPlan[PlanType <:
QueryPlan[PlanType]] extends TreeNode[PlanT
/**
* All the attributes that are used for this plan.
*/
- lazy val allAttributes: Seq[Attribute] = children.flatMap(_.output)
+ lazy val allAttributes: AttributeSeq = children.flatMap(_.output)
--- End diff --
We should probably construct the AttributeSeq outside of the loop in the
various projection operators, too, although that doesn't appear to be as
serious a bottleneck yet.
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