[GitHub] [spark] cloud-fan commented on a change in pull request #27718: [SPARK-30885][SQL][FOLLOW-UP] Fix issues where some V1 commands allow tables that are not fully qualified.

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cloud-fan commented on a change in pull request #27718: [SPARK-30885][SQL][FOLLOW-UP] Fix issues where some V1 commands allow tables that are not fully qualified.
URL: https://github.com/apache/spark/pull/27718#discussion_r386214168
 
 

 ##########
 File path: sql/core/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveSessionCatalog.scala
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 @@ -655,6 +655,9 @@ class ResolveSessionCatalog(
   object SessionCatalogAndTable {
     def unapply(nameParts: Seq[String]): Option[(CatalogPlugin, Seq[String])] = nameParts match {
       case SessionCatalogAndIdentifier(catalog, ident) =>
+        if (ident.namespace.isEmpty) {
+          throw new AnalysisException(s"Table not found: ${nameParts.quoted}")
 
 Review comment:
   nit: maybe we can check more
   ```
   if (ident.namespace.length != 1) {
     fail("The namespace of tables in the session catalog must have only one name part.")
   }
   ```

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