TYPE OR TABLE DEPENDENCY OF OBJECT TYPE (ORA-2303)

Question

제품 : SQL*PLUS
작성날짜 : 2004-05-20
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TYPE OR TABLE DEPENDENCY OF OBJECT TYPE (ORA-2303)
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PURPOSE
Type이나 table의 dependency가 있는 type을 drop하거나 replace하고자
하면 ORA-02303 error가 난다. 이 error의 원인을 알아보도록 한다.
Explanation
Object의 attribute나 method를 수정하기 위해서는 object type을 drop하고 재생성
해야 한다. Type이나 table의 dependency가 있는 type을 drop하거나 replace하고자
하면 ORA-02303 error가 난다. Object type은 type (nested table 또는 VARRAY)
또는 object table로써 구체적으로 표현된다. 만약 data의 보존이 필요하다면
temporary table에 manual하게 옮겨놓아야 한다.
SQL Reference guide에 의하면 DROP TYPE FORCE 옵션은 recommend하지 않는다.
왜냐하면 이 옵션을 쓰게 되면 복구가 불가능하고 dependency가 있던 table들은
access하지 못하는 결과를 초래한다.
Example
아래의 query 1, 2, 3은 dependency을 확인하는 query문이다.
1. Find nested tables
select owner, parent_table_name, parent_table_column
from dba_nested_tables
where (table_type_owner, table_type_name) in
(select owner, type_name
from dba_coll_types
where elem_type_owner = '<typeOwner>'
and elem_type_name = '<typeName>');
2. Find VARRAYs
select owner, parent_table_name, parent_table_column
from dba_varrays
where (type_owner, type_name) in
(select owner, type_name
from dba_coll_types
where elem_type_owner = '<typeOwner>'
and elem_type_name = '<typeName');
3. Find object tables
select owner, table_name
from dba_object_tables
where table_type_owner = '<typeOwner>'
and table_type = '<typeName>'
and nested = 'NO';
Example ) Logon as Scott
/* Create an user defined object type */
SQL> create type object_type as object (
col1 number,
col2 varchar2(20))
Type created.
/* Create nested table type */
SQL> create type object_ntable as table of object_type
Type created.
/* Create varray type*/
SQL> create type object_varray as varray(5) of object_type
Type created.
/* Create parent table with nested table and varray */
SQL> create table master (
col1 number primary key,
col2_list object_ntable,
col3_list object_varray)
nested table col2_list store as master_col2
Table created.
/* Create object table */
SQL> create table object_table of object_type (col1 primary key)
object id primary key;
Table created.
ORA-2303 results if attempt to drop type with dependencies
SQL> drop type object_type;
drop type object_type
ERROR at line 1:
ORA-02303: cannot drop or replace a type with type or table dependents
위의 queery 1,2,3을 이용하여 object type dependency을 확인한다.
-- Find nested tables utilizing object type
SQL> select owner, parent_table_name, parent_table_column
from dba_nested_tables
where (table_type_owner, table_type_name) in
(select owner, type_name
from dba_coll_types
where elem_type_owner = 'SCOTT'
and elem_type_name = 'OBJECT_TYPE');
OWNER PARENT_TABLE_NAME PARENT_TABLE_COLUMN
SCOTT MASTER COL2_LIST
-- Find VARRAYs utilizing object type
SQL> select owner, parent_table_name, parent_table_column
from dba_varrays
where (type_owner, type_name) in
(select owner, type_name
from dba_coll_types
where elem_type_owner = 'SCOTT'
and elem_type_name = 'OBJECT_TYPE');
OWNER PARENT_TABLE_NAME PARENT_TABLE_COLUMN
SCOTT MASTER COL3_LIST
-- Find object tables
SQL> select owner, table_name
from dba_object_tables
where table_type_owner = 'SCOTT'
and table_type = 'OBJECT_TYPE'
and nested = 'NO';
OWNER TABLE_NAME
SCOTT OBJECT_TABLE
참고)
bulletin : 11576 처럼 utility을 이용하는 방법이 있다.
우리는 여기서 주의하여야 할 것은 script $ORACLE_HOME/rdbms/admin/utldtree.sql
을 내가 보고자 하는 user에서 돌려야 한다는 것이다.
$sqlplus scott/tiger
SQL> @$ORACLE_HOME/rdbms/admin/utldtree.sql
SQL> exec deptree_fill('TYPE','SCOTT','OBJECT_TYPE');
PL/SQL procedure successfully completed.
SQL> select * from ideptree;
DEPENDENCIES
TYPE SCOTT.OBJECT_TYPE
TYPE SCOTT.OBJECT_NTABLE
TABLE SCOTT.MASTER
TYPE SCOTT.OBJECT_VARRAY
TABLE SCOTT.MASTER
TABLE SCOTT.MASTER_COL2
TABLE SCOTT.OBJECT_TABLE
Reference Documents
Korean bulletin : 11576
<Note:69661.1>

Answer 1

Hi Carsten,
Thanks for the sharp hint. It works.
However, when I create a table using the schema, it gives me this error:
varray DOC."LISTOFASSIGNEDNUMBER"."ASSIGNEDNUMBER"
ERROR at line 14:
ORA-02337: not an object type column
Here is the script:
CREATE TABLE CUSTOMMANIFEST (
ID NUMBER PRIMARY KEY,
DOC sys.XMLTYPE
xmltype column doc
XMLSCHEMA "http://www.abc.com/cm.xsd"
element "CustomManifest"
varray DOC."LISTOFMANIFESTPORTINFO"."MANIFESTPORTINFO"
store as table MANIFESTPORTINFO_TABLE
(primary key (NESTED_TABLE_ID, ARRAY_INDEX))
organization index overflow
varray DOC."LISTOFASSIGNEDNUMBER"."ASSIGNEDNUMBER"
store as table ASSIGNEDNUMBER_TABLE
(primary key (NESTED_TABLE_ID, ARRAY_INDEX))
organization index overflow
LISTOFASSIGNEDNUMBER itself is complexType and not sure where is the error....
You may note there are more than two hierachy/levels...
Thanks.