cloud-fan commented on a change in pull request #26741: [SPARK-30104][SQL] Fix 
catalog resolution for 'global_temp'
URL: https://github.com/apache/spark/pull/26741#discussion_r355883930
 
 

 ##########
 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/LookupCatalog.scala
 ##########
 @@ -92,15 +92,50 @@ private[sql] trait LookupCatalog extends Logging {
    * Catalog name takes precedence over namespaces.
    */
   object CatalogAndNamespace {
-    def unapply(parts: Seq[String]): Some[(CatalogPlugin, 
Option[Seq[String]])] = parts match {
-      case Seq(catalogName, tail @ _*) =>
+    def unapply(nameParts: Seq[String]): Some[(CatalogPlugin, Seq[String])] = {
+      assert(nameParts.nonEmpty)
+      nameParts match {
 
 Review comment:
   hmm, is it fixed?

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