如何区分嵌套表和借助Oracle元数据系统表的表？

Question

我在 Oracle 中有嵌套表 xxx_nested_table

CREATE OR REPLACE TYPE xxx_tab AS TABLE OF VARCHAR2(30);

CREATE TABLE xxx_nested_table (id NUMBER, column_xxx xxx_tab)
       NESTED TABLE column_xxx STORE AS xxx_col_tab;

当我从 user_objects 选择记录时，我无法区分带有表对象的记录和带有嵌套表对象的记录：

select * from user_objects where object_name like '%XXX%'

OBJECT_NAME SUBOBJECT_NAME  OBJECT_ID   DATA_OBJECT_ID  OBJECT_TYPE CREATED LAST_DDL_TIME   TIMESTAMP   STATUS  TEMPORARY   GENERATED   SECONDARY
XXX_COL_TAB     54496   54496   TABLE   06.09.2011 23:49:25 06.09.2011 23:49:25 2011-09-06:23:49:25 VALID   N   N   N
XXX_NESTED_TABLE        54495   54495   TABLE   06.09.2011 23:49:25 06.09.2011 23:49:25 2011-09-06:23:49:25 VALID   N   N   N
XXX_TAB     54491       TYPE    06.09.2011 23:48:02 06.09.2011 23:48:02 2011-09-06:23:48:02 VALID   N   N   N

如何区分？在什么系统元数据表上？

Answer 1

成立

select * from USER_NESTED_TABLES