Oracle PL/SQL之嵌套表（Nested Table）

Test Code:

Connected to Oracle Database 11g Enterprise Edition Release 11.1.0.7.0
Connected as xxpo

SQL> CREATE OR REPLACE TYPE color_tab_t AS TABLE OF VARCHAR2(30);
2  /

Type created

SQL>
SQL> CREATE TABLE color_models (
2  model_type VARCHAR2(12)
3  , colors color_tab_t
4  )
5  NESTED TABLE colors STORE AS color_model_colors_tab
6  /

Table created

SQL>
SQL> BEGIN
2  INSERT INTO color_models
3  VALUES ('RGB', color_tab_t ('RED','GREEN','BLUE'));
4  END;
5  /

PL/SQL procedure successfully completed

SQL> select * from color_models;

MODEL_TYPE   COLORS
------------ ------
RGB          <Objec

SQL> select * from color_model_colors_tab;

select * from color_model_colors_tab

ORA-22812: cannot reference nested table column's storage table

SQL>
SQL> SELECT object_name
2        ,object_type
3        ,status
4  FROM   dba_objects
5  WHERE  object_name = upper('COLOR_MODEL_COLORS_TAB');

OBJECT_NAME                                                                      OBJECT_TYPE         STATUS
-------------------------------------------------------------------------------- ------------------- -------
COLOR_MODEL_COLORS_TAB                                                           TABLE               VALID

SQL> SELECT /*+NESTED_TABLE_GET_REFS+*/ * FROM COLOR_MODEL_COLORS_TAB;

COLUMN_VALUE
------------------------------
RED
GREEN
BLUE

SQL>

Ref:

1. Page 357, Oracle PL/SQL Programming FIFTH EDITION, Steven Feuerstein with Bill Pribyl, O'REILLY

2. http://www.itpub.net/viewthread.php?tid=640129