Use the built-in Oracle database VALUE() function to select a row from an object table : VALUE Function « Object Oriented « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. Object Oriented
3. VALUE Function

Value() treats the row as an actual object and returns the attributes for the object within a constructor for the object type.

The VALUE() function accepts a parameter containing a table alias

SQL> CREATE Or Replace TYPE ProductType AS OBJECT (
  2    id          NUMBER,
  3    name        VARCHAR2(15),
  4    description VARCHAR2(22),
  5    price       NUMBER(5, 2),
  6    days_valid  NUMBER
  7  )
  8  /

Type created.

SQL>
SQL> CREATE TABLE object_products OF ProductType
  2  /

Table created.

SQL>
SQL> INSERT INTO object_products (
  2    id, name, description, price, days_valid
  3  ) VALUES (
  4    2, 'AAA', 'BBB', 2.99, 5
  5  );

1 row created.

SQL>
SQL> select * from object_products;

 ID NAME            DESCRIPTION                 PRICE DAYS_VALID
--- --------------- ---------------------- ---------- ----------
  2 AAA             BBB                          2.99          5

SQL>
SQL> SELECT VALUE(op)
  2  FROM object_products op;

VALUE(OP)(ID, NAME, DESCRIPTION, PRICE, DAYS_VALID)
---------------------------------------------------
PRODUCTTYPE(2, 'AAA', 'BBB', 2.99, 5)

SQL>
SQL>
SQL> drop table object_products;

Table dropped.

SQL>