1. Demostraciones de Operaciones DML para OR

2. Subtipos y Herencia CREATE TYPE person_t AS OBJECT (name VARCHAR2(100), ssn NUMBER) NOT FINAL; / CREATE TYPE employee_t UNDER person_t (department_id NUMBER, salary NUMBER) NOT FINAL; / CREATE TYPE part_time_emp_t UNDER employee_t (num_hrs NUMBER); /

3. Inserción usando subtipos En Oracle los subtipos no pueden ser solapados. insert into persons values(part_time_emp_t('Claudia Gonzalez',7776312,10,1000,2)); Insert into persons values(employee_t('Edna Ruckhaus',5747340,10,7000)); Insert into persons values(person_t('Soraya Abad',5798632));

4. Seleccionando SQL> select * from persons; NAME SSN ----------------- -------------- Claudia Gonzalez 7776312 Edna Ruckhaus 5747340 Soraya Abad 5798632

5. Seleccionando SQL> select value(p) from persons p; VALUE(P)(NAME, SSN) ----------------------------------------- -------------------------------------- PART_TIME_EMP_T('Claudia Gonzalez', 7776312, 10, 1000, 2) EMPLOYEE_T('Edna Ruckhaus', 5747340, 10, 7000) PERSON_T('Soraya Abad', 5798632)

6. Evitando subtipos SELECT VALUE(p) FROM persons p WHERE VALUE(p) IS OF (ONLY employee_t ); VALUE(P)(NAME, SSN) ---------------------------------------- -- EMPLOYEE_T('Edna Ruckhaus', 5747340, 10, 7000)

7. Varrays CREATE TYPE phones AS VARRAY(10) OF varchar2(10); / Create table suppliers( supcode number(5), Company varchar2(20), ph phones);

8. Insertando en Varrays insert into suppliers values (101,’Interface Computers’, Phones(‘64199705’,’55136663’)); insert into suppliers values (102,’Western Engg. Corp’, Phones(‘23203945’,’23203749’,’939 6577727’));

9. Consultando SQL> select * from suppliers; SUPCODE COMPANY PH ------- ------------------- ------------------ 101 Interface Computers PHONES('64199705', '55136663') 102 Western Engg. Corp PHONES('23203945', '23203749', '9396577727')

10. Nested Tables CREATE TYPE people_typ AS TABLE OF person_typ; / CREATE TABLE people_tab ( group_no NUMBER, people_column people_typ ) NESTED TABLE people_column STORE AS people_column_nt;

11. Nested Tables INSERT INTO people_tab VALUES ( 100, people_typ( person_typ(1, 'John Smith', '1-800-555-1212'), person_typ(2, 'Diane Smith', NULL)));

12. Ref CREATE TYPE emp_person_typ AS OBJECT ( name VARCHAR2(30), manager REF emp_person_typ ); / CREATE TABLE emp_person_obj_table OF emp_person_typ;

13. Ref INSERT INTO emp_person_obj_table VALUES ( emp_person_typ ('John Smith', NULL)); INSERT INTO emp_person_obj_table SELECT emp_person_typ ('Bob Jones', REF(e)) FROM emp_person_obj_table e WHERE e.name = 'John Smith';

14. Funciones CREATE TYPE person_typ AS OBJECT ( idno NUMBER, name VARCHAR2(30), phone VARCHAR2(20), MAP MEMBER FUNCTION get_idno RETURN NUMBER, STATIC FUNCTION show_super (person_obj in person_typ) RETURN VARCHAR2, MEMBER FUNCTION show RETURN VARCHAR2) NOT FINAL; /

15. CREATE TYPE BODY person_typ AS MAP MEMBER FUNCTION get_idno RETURN NUMBER IS BEGIN RETURN idno; END; -- static function that can be called by subtypes STATIC FUNCTION show_super (person_obj in person_typ) RETURN VARCHAR2 IS BEGIN RETURN 'Id: ' || TO_CHAR(person_obj.idno) || ', Name: ' || person_obj.name; END; -- function that can be overriden by subtypes MEMBER FUNCTION show RETURN VARCHAR2 IS BEGIN RETURN person_typ.show_super ( SELF ); END; /