ORA-00932: inconsistent datatypes: expected REF : Select « Object Oriented « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. Object Oriented
3. Select

SQL>
SQL>
SQL>
SQL> CREATE OR REPLACE TYPE address AS OBJECT
  2              (line1 VARCHAR2(20),
  3               line2 VARCHAR2(20),
  4               city VARCHAR2(20),
  5               state_code VARCHAR2(2),
  6               zip VARCHAR2(13),
  7    MEMBER FUNCTION get_address RETURN VARCHAR2,
  8    MEMBER PROCEDURE set_address
  9              (addressLine1 VARCHAR2,
 10               addressLine2 VARCHAR2,
 11               address_city VARCHAR2,
 12               address_state VARCHAR2,
 13               address_zip VARCHAR2)
 14  );
 15  /

Type created.

SQL> CREATE OR REPLACE TYPE BODY address AS
  2    MEMBER FUNCTION get_address RETURN VARCHAR2
  3    IS
  4    BEGIN
  5      RETURN (SELF.line1||' '||SELF.line2||' '||SELF.city||', '||SELF.state_code||' '||SELF.zip);
  6    END get_address;
  7    MEMBER PROCEDURE set_address (addressLine1 VARCHAR2,
  8                  addressLine2 VARCHAR2,
  9                  address_city VARCHAR2,
 10                  address_state VARCHAR2,
 11                  address_zip VARCHAR2)
 12    IS
 13    BEGIN
 14      line1 :=addressLine1;
 15      line2 :=addressLine2;
 16      city :=address_city;
 17      state_code :=address_state;
 18      zip :=address_zip;
 19    END set_address;
 20  END;
 21  /

Type body created.

SQL> CREATE TABLE employee
  2  (empid number(10)PRIMARY KEY,
  3   lastname varchar2(30)NOT NULL,
  4   firstname varchar2(30)NOT NULL,
  5   middle_initial varchar2(2),
  6   emp_address REF address);

Table created.

SQL>
SQL> DECLARE
  2    addressValue address;
  3  BEGIN
  4    SELECT emp_address INTO addressValue FROM employee WHERE lastname ='LAKSHMAN';
  5    DBMS_OUTPUT.PUT_LINE('The address of the employee LAKSHMAN is');
  6    DBMS_OUTPUT.PUT_LINE(addressValue.line1||' '||addressValue.line2);
  7    DBMS_OUTPUT.PUT_LINE(addressValue.city||', '||addressValue.state_code||' '||addressValue.zip);
  8  END;
  9  /
  SELECT emp_address INTO addressValue FROM employee WHERE lastname ='LAKSHMAN';
         *
ERROR at line 4:
ORA-06550: line 4, column 10:
PL/SQL: ORA-00932: inconsistent datatypes: expected REF
JAVA2S.ADDRESS got JAVA2S.ADDRESS
ORA-06550: line 4, column 3:
PL/SQL: SQL Statement ignored


SQL>
SQL> SELECT * FROM employee e WHERE e.emp_address.city ='Vancouver';

no rows selected

SQL>
SQL> SELECT e.emp_address.get_address() FROM employee e;

no rows selected

SQL>
SQL> DROP TABLE employee;

Table dropped.