dongjoon-hyun commented on a change in pull request #23873: [SPARK-26975][SQL]
Support nested-column pruning over limit/sample/repartition
URL: https://github.com/apache/spark/pull/23873#discussion_r261768034
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
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@@ -651,6 +651,10 @@ object ColumnPruning extends Rule[LogicalPlan] {
// Can't prune the columns on LeafNode
case p @ Project(_, _: LeafNode) => p
+ case p @ NestedColumnPruning(prunedNestedAttrs,
projectsOnPrunedNestedAttrs)
Review comment:
Oh, I missed to answer here, @maropu . This should be here before [line
660](https://github.com/apache/spark/pull/23873/files#diff-a636a87d8843eeccca90140be91d4fafR660).
Otherwise, the projection is already moved down as the whole attribute instead
of a subset of fields.
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