karenfeng commented on a change in pull request #32301:
URL: https://github.com/apache/spark/pull/32301#discussion_r619521322
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/NestedColumnAliasing.scala
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@@ -30,54 +30,61 @@ import org.apache.spark.sql.types._
*/
object NestedColumnAliasing {
Review comment:
I wasn't sure how much to add to the classdoc, but I added some more
examples.
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