Fokko commented on code in PR #10498:
URL: https://github.com/apache/iceberg/pull/10498#discussion_r1675399327


##########
core/src/main/java/org/apache/iceberg/jdbc/JdbcCatalog.java:
##########
@@ -466,6 +466,16 @@ public List<Namespace> listNamespaces(Namespace namespace) 
throws NoSuchNamespac
                         Arrays.stream(n.levels())
                             .limit(subNamespaceLevelLength)
                             .toArray(String[]::new)))
+            // exclude fuzzy matches when `namespace` contains `%` or `_`
+            .filter(
+                n -> {
+                  for (int i = 0; i < namespace.levels().length; i++) {
+                    if (!n.levels()[i].equals(namespace.levels()[i])) {
+                      return false;
+                    }
+                  }
+                  return true;
+                })
             // remove duplicates
             .distinct()

Review Comment:
   Swap it back:
   ```suggestion
               // remove duplicates
               .distinct()
               // exclude fuzzy matches when `namespace` contains `%` or `_`
               .filter(
                   n -> {
                     for (int i = 0; i < namespace.levels().length; i++) {
                       if (!n.levels()[i].equals(namespace.levels()[i])) {
                         return false;
                       }
                     }
                     return true;
                   })
   ```



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