viirya commented on a change in pull request #35850:
URL: https://github.com/apache/spark/pull/35850#discussion_r827565230
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/NestedColumnAliasing.scala
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@@ -321,6 +321,38 @@ object GeneratorNestedColumnAliasing {
// need to prune nested columns through Project and under Generate. The
difference is
// when `nestedSchemaPruningEnabled` is on, nested columns will be pruned
further at
// file format readers if it is supported.
+
+ // There are [[ExtractValue]] expressions on or not on the output of the
generator. Generator
+ // can also have different types:
Review comment:
Can you rephrase the comment? It looks a bit weird. E.g., I'm not sure
what the first sentence means/wants to mean.
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