ulysses-you commented on code in PR #39870:
URL: https://github.com/apache/spark/pull/39870#discussion_r1098126440
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sql/catalyst/src/main/scala/org/apache/spark/sql/execution/datasources/v2/DataSourceV2Relation.scala:
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@@ -54,15 +54,18 @@ case class DataSourceV2Relation(
override lazy val metadataOutput: Seq[AttributeReference] = table match {
case hasMeta: SupportsMetadataColumns =>
- val resolve = conf.resolver
- val outputNames = outputSet.map(_.name)
- def isOutputColumn(col: MetadataColumn): Boolean = {
- outputNames.exists(name => resolve(col.name, name))
+ getTagValue(CACHED_META_OUTPUT_TAG).getOrElse {
Review Comment:
I'm not sure it's safe to add a project for root node. One issue is we do
not know the output of root node because it's not resolved.
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