Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/11995#discussion_r58259632
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -327,7 +327,8 @@ object ColumnPruning extends Rule[LogicalPlan] {
case p @ Project(_, a: Aggregate) if (a.outputSet --
p.references).nonEmpty =>
p.copy(
child = a.copy(aggregateExpressions =
a.aggregateExpressions.filter(p.references.contains)))
- case a @ Project(_, e @ Expand(_, _, grandChild)) if (e.outputSet --
a.references).nonEmpty =>
+ case a @ Project(_, e @ Expand(_, _, grandChild))
+ if (e.outputSet -- a.references).nonEmpty =>
--- End diff --
It is best to avoid spurious changes because it pollutes `git blame`. I
can revert this while merging this time.
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