Github user henryr commented on a diff in the pull request:
https://github.com/apache/spark/pull/20687#discussion_r173561415
--- 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.
*/
--- End diff --
Done.
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