nit

Author: yaooqinn

sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4

@@ -1097,6 +1097,7 @@ ansiNonReserved
     | OVER
     | OVERLAY
     | OVERWRITE
+    | OWNER
     | PARTITION
     | PARTITIONED
     | PARTITIONS

sql/catalyst/src/main/java/org/apache/spark/sql/connector/catalog/SupportsNamespaces.java

@@ -64,10 +64,10 @@ public interface SupportsNamespaces extends CatalogPlugin {
   String PROP_OWNER_TYPE = "ownerType";
 
   /**
-   * The list of immutable namespace properties, which can not be removed or changed directly by
+   * The list of reserved namespace properties, which can not be removed or changed directly by
    * the syntax:
    * {{
-   *   ALTER (DATABASE|SCHEMA|NAMESPACE) SET DBPROPERTIES(...)
+   *   ALTER NAMESPACE ... SET PROPERTIES ...
    * }}
    *
    * They need specific syntax to modify