Yaohua628 commented on code in PR #36851:
URL: https://github.com/apache/spark/pull/36851#discussion_r906361503
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/SchemaPruning.scala:
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@@ -103,8 +104,14 @@ object SchemaPruning extends Rule[LogicalPlan] {
}
}
+ private def containsNestedColumn(fsRelation: HadoopFsRelation): Boolean =
Review Comment:
> does nested column pruning work for metadata columns?
Yes, we combined them in this logic. And the metadata pruning should work
for every file format:
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/SchemaPruning.scala#L92
(It's hidden file metadata for file-based V1 source)
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