yaooqinn commented on code in PR #47592:
URL: https://github.com/apache/spark/pull/47592#discussion_r1704862902


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/connector/catalog/CatalogManager.scala:
##########
@@ -106,19 +106,25 @@ class CatalogManager(
     }
   }
 
-  def setCurrentNamespace(namespace: Array[String]): Unit = synchronized {
+  private def assertNamespaceExist(namespace: Array[String]): Unit = {
     currentCatalog match {
-      case _ if isSessionCatalog(currentCatalog) && namespace.length == 1 =>
-        v1SessionCatalog.setCurrentDatabase(namespace.head)
-      case _ if isSessionCatalog(currentCatalog) =>
-        throw QueryCompilationErrors.noSuchNamespaceError(namespace)
       case catalog: SupportsNamespaces if !catalog.namespaceExists(namespace) 
=>
-        throw QueryCompilationErrors.noSuchNamespaceError(namespace)
+        throw QueryCompilationErrors.noSuchNamespaceError(catalog.name() +: 
namespace)
       case _ =>
-        _currentNamespace = Some(namespace)
     }
   }
 
+  def setCurrentNamespace(namespace: Array[String]): Unit = synchronized {
+    if (isSessionCatalog(currentCatalog) && namespace.length == 1) {
+      v1SessionCatalog.validateGlobalTempView(namespace.head)
+      assertNamespaceExist(namespace)
+      v1SessionCatalog.setCurrentDatabaseWithoutCheck(namespace.head)

Review Comment:
   the db name seems to be formatted and check non-equality with 
globalTempDatabase twice?



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