Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20476#discussion_r165374987
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/PushDownOperatorsToDataSource.scala
---
@@ -81,35 +81,34 @@ object PushDownOperatorsToDataSource extends
Rule[LogicalPlan] with PredicateHel
// TODO: add more push down rules.
- // TODO: nested fields pruning
- def pushDownRequiredColumns(plan: LogicalPlan, requiredByParent:
Seq[Attribute]): Unit = {
--- End diff --
make it a private method instead of an inline method
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