cloud-fan commented on code in PR #42577:
URL: https://github.com/apache/spark/pull/42577#discussion_r1384596211
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/interface.scala:
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@@ -170,6 +170,25 @@ case class CatalogTablePartition(
}
}
+/**
+ * A container for clustering information.
+ *
+ * @param columnNames the names of the columns used for clustering.
+ */
+case class ClusterBySpec(columnNames: Seq[UnresolvedAttribute]) {
Review Comment:
It's weird to use `UnresolvedAttribute` here as we are not going to resolve
it in the analyzer. How about just `Seq[Seq[String]]` or `Seq[FieldReference]`?
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