VALUE function for object : Value Function « Object Oriented Database « Oracle PL / SQL

1. Oracle PL / SQL
2. Object Oriented Database
3. Value Function

VALUE function for object

SQL> CREATE OR REPLACE TYPE address_obj as OBJECT(
  2        street VARCHAR2(20),
  3        city VARCHAR2(20),
  4        state CHAR(2),
  5        zip CHAR(5));
  6  /

Type created.

SQL>
SQL> CREATE TABLE address_table OF ADDRESS_OBJ;

Table created.

SQL>
SQL>  INSERT INTO address_table VALUES (ADDRESS_OBJ('1 A St.','Mobile','AL','36608'));

1 row created.

SQL>
SQL> CREATE TABLE client (name VARCHAR2(20),
  2    address REF address_obj scope is address_table);

Table created.

SQL>
SQL> INSERT INTO client SELECT 'Walsh', REF(aa) FROM address_table aa;

1 row created.

SQL>



SQL>
SQL> -- Address_table (which contains row objects) using the VALUE function:
SQL>
SQL> SELECT VALUE(aa)
  2  FROM address_table aa;

VALUE(AA)(STREET, CITY, STATE, ZIP)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ADDRESS_OBJ('1 A St.', 'Mobile', 'AL', '36608')

SQL>
SQL>
SQL>
SQL>
SQL>
SQL> drop table client;

Table dropped.

SQL>
SQL> drop table address_table;

Table dropped.

SQL>
SQL>
SQL>
           
       

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