Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/20687#discussion_r172984333 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/ComplexTypes.scala --- @@ -22,32 +22,24 @@ import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan import org.apache.spark.sql.catalyst.rules.Rule /** -* push down operations into [[CreateNamedStructLike]]. +* Simplify redundant [[CreateNamedStructLike]], [[CreateArray]] and [[CreateMap]] expressions. */ object SimplifyCreateStructOps extends Rule[LogicalPlan] { --- End diff -- `SimplifyExtractValueOps`?
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