cloud-fan commented on a change in pull request #29587:
URL: https://github.com/apache/spark/pull/29587#discussion_r506477673
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File path: sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
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@@ -2067,6 +2067,13 @@ class Dataset[T] private[sql](
* // +----+----+----+----+
* }}}
*
+ * Note that `allowMissingColumns` supports nested column in struct types,
if the config
+ * `spark.sql.unionByName.structSupport.enabled` is enabled. Missing nested
columns
Review comment:
this needs update.
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