Github user dreamquster commented on a diff in the pull request:
https://github.com/apache/spark/pull/5358#discussion_r28043649
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -171,8 +171,26 @@ object ColumnPruning extends Rule[LogicalPlan] {
Project(substitutedProjection, child)
+ case gen@Generate(_: Explode, _, _, _, c) =>
--- End diff --
SPARK-6489:this issue means it pruned columns when explode lateral view
clause.
Does it need to extend to all generate clause? I want to mark generate
node's parent reference in analysis phase. Is there another gracefully method
to get its parent references?
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