Circular Dependency -Table Insertion Error - sql

Question

I want to insert data into table but got below error..Can any one help me..
CREATE OR REPLACE TYPE TEST_TYP FORCE IS OBJECT
("id" VARCHAR(5000 NULL)
NOT FINAL;
CREATE OR REPLACE TYPE TEST_TAB is table of REF TEST_TYP;
CREATE OR REPLACE TYPE TEST1_TYP FORCE IS OBJECT
("id" VARCHAR2(500) NULL,
"extension" "TEST_TAB" NULL )
NOT FINAL;
CREATE TABLE "TEST_OBJ_TABLE" OF "TEST1_TYP"
NESTED TABLE "extension" STORE AS "Allin"
When I try to insert using this statementL
insert into "TEST_OBJ_TABLE" ("id","extension")
VALUES(
'0FE71A85',
"TEST_TAB"("TEST_TYP"( '0FE71A8'))
);
It throws this error
Error at Command Line : 59 Column : 12
Error report -
SQL Error: ORA-00932: inconsistent datatypes: expected REF SUB_HWOW.TEST_TYP got SUB_HWOW.TEST_TYP
00932. 00000 - "inconsistent datatypes: expected %s got %s"
*Cause:
*Action:

Answer 1

You have to modify object TEST_TYP -> varchar2 has to be max 4000.
You have to store this object in db.
Create object table for TEST_TYP
create table t_for_test_type of TEST_TYP;
To obtain object reference, the object have to be save in db table. In your case:
declare
v_ref_to_test_type1 ref TEST_TYP;
begin
insert into t_for_test_type t values('abcd1') return ref(t) into v_ref_to_test_type1;
end:
Join all parts together.
declare
v_ref_to_test_type1 ref TEST_TYP;
v_ref_to_test_type2 ref TEST_TYP;
begin
insert into t_for_test_type t values('abcd1') return ref(t) into v_ref_to_test_type1;
insert into t_for_test_type t values('abcd2') return ref(t) into v_ref_to_test_type2;
insert into TEST_OBJ_TABLE values (TEST1_TYP('abcd',new TEST_TAB(v_ref_to_test_type1,v_ref_to_test_type2)));
end;
Query table.
select t."id",x.column_value from TEST_OBJ_TABLE t, table(t."extension") x it returns id + ref to other object
Viewing the referenced object.
select t."id",deref(x.column_value) from TEST_OBJ_TABLE t, table(t."extension") x
Note1. You should avoid declaring attribute using double quote. Db becomes case sensitive and it's not normal situation :)
Note2. I don't know why code formatting is not working today
Question. Why are you trying to use such complicated construction?

Answer 2

Changed the original answer. The quotes are doing you no favors - nor was calling your column names id. Removed the REF reference.
CREATE OR REPLACE TYPE TEST_TYP FORCE IS OBJECT
(id1 VARCHAR(4000) NULL)
NOT FINAL;
CREATE OR REPLACE TYPE TEST_TAB is table of TEST_TYP;
CREATE OR REPLACE TYPE TEST1_TYP FORCE IS OBJECT
(id2 VARCHAR2(500) NULL,
extension TEST_TAB NULL )
NOT FINAL;
CREATE TABLE TEST_OBJ_TABLE OF TEST1_TYP
NESTED TABLE extension STORE AS Allin ;
insert into TEST_OBJ_TABLE ( ID2, EXTENSION)
VALUES(
'0FE71A85',
TEST_TAB(TEST_TYP( '0FE71A8'))
);
SELECT * FROM TEST_OBJ_TABLE ;