Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20687#discussion_r171174781
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/ComplexTypes.scala
---
@@ -25,8 +25,8 @@ import org.apache.spark.sql.catalyst.rules.Rule
* push down operations into [[CreateNamedStructLike]].
*/
object SimplifyCreateStructOps extends Rule[LogicalPlan] {
--- End diff --
nit: can we merge these 3 rules? then we only need to transform the plan
once.
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