stevenzwu commented on code in PR #13130:
URL: https://github.com/apache/iceberg/pull/13130#discussion_r2121798975


##########
hive-metastore/src/main/java/org/apache/iceberg/hive/HiveCatalog.java:
##########
@@ -508,7 +508,7 @@ public void createNamespace(Namespace namespace, 
Map<String, String> meta) {
 
   @Override
   public List<Namespace> listNamespaces(Namespace namespace) {
-    if (!isValidateNamespace(namespace) && !namespace.isEmpty()) {
+    if (!namespace.isEmpty() && (!isValidateNamespace(namespace) || 
!namespaceExists(namespace))) {

Review Comment:
   nit: move line 514-516 to the beginning of this method. then we can remove 
the namespace condition here.



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