The %TYPE attribute, used in PL/SQL variable and parameter declarations, is supported by the DB2® data server. Use of this attribute ensures that type compatibility between table columns and PL/SQL variables is maintained.
A qualified column name in dot notation or the name of a previously declared variable must be specified as a prefix to the %TYPE attribute. The data type of this column or variable is assigned to the variable being declared. If the data type of the column or variable changes, there is no need to modify the declaration code.
The %TYPE attribute can also be used with formal parameter declarations.
>>-name--+-+-table-+--.--column-+--%TYPE----------------------->< | '-view--' | '-variable-------------'
CREATE OR REPLACE PROCEDURE emp_sal_query (
p_empno IN NUMBER
)
IS
v_ename VARCHAR2(10);
v_job VARCHAR2(9);
v_hiredate DATE;
v_sal NUMBER(7,2);
v_deptno NUMBER(2);
v_avgsal NUMBER(7,2);
BEGIN
SELECT ename, job, hiredate, sal, deptno
INTO v_ename, v_job, v_hiredate, v_sal, v_deptno
FROM emp WHERE empno = p_empno;
DBMS_OUTPUT.PUT_LINE('Employee # : ' || p_empno);
DBMS_OUTPUT.PUT_LINE('Name : ' || v_ename);
DBMS_OUTPUT.PUT_LINE('Job : ' || v_job);
DBMS_OUTPUT.PUT_LINE('Hire Date : ' || v_hiredate);
DBMS_OUTPUT.PUT_LINE('Salary : ' || v_sal);
DBMS_OUTPUT.PUT_LINE('Dept # : ' || v_deptno);
SELECT AVG(sal) INTO v_avgsal
FROM emp WHERE deptno = v_deptno;
IF v_sal > v_avgsal THEN
DBMS_OUTPUT.PUT_LINE('Employee''s salary is more than the department '
|| 'average of ' || v_avgsal);
ELSE
DBMS_OUTPUT.PUT_LINE('Employee''s salary does not exceed the department '
|| 'average of ' || v_avgsal);
END IF;
END;
CREATE OR REPLACE PROCEDURE emp_sal_query (
p_empno IN emp.empno%TYPE
)
IS
v_ename emp.ename%TYPE;
v_job emp.job%TYPE;
v_hiredate emp.hiredate%TYPE;
v_sal emp.sal%TYPE;
v_deptno emp.deptno%TYPE;
v_avgsal v_sal%TYPE;
BEGIN
SELECT ename, job, hiredate, sal, deptno
INTO v_ename, v_job, v_hiredate, v_sal, v_deptno
FROM emp WHERE empno = p_empno;
DBMS_OUTPUT.PUT_LINE('Employee # : ' || p_empno);
DBMS_OUTPUT.PUT_LINE('Name : ' || v_ename);
DBMS_OUTPUT.PUT_LINE('Job : ' || v_job);
DBMS_OUTPUT.PUT_LINE('Hire Date : ' || v_hiredate);
DBMS_OUTPUT.PUT_LINE('Salary : ' || v_sal);
DBMS_OUTPUT.PUT_LINE('Dept # : ' || v_deptno);
SELECT AVG(sal) INTO v_avgsal
FROM emp WHERE deptno = v_deptno;
IF v_sal > v_avgsal THEN
DBMS_OUTPUT.PUT_LINE('Employee''s salary is more than the department '
|| 'average of ' || v_avgsal);
ELSE
DBMS_OUTPUT.PUT_LINE('Employee''s salary does not exceed the department '
|| 'average of ' || v_avgsal);
END IF;
END;
The p_empno parameter is an example of a formal parameter
that is defined using the %TYPE attribute. The v_avgsal variable is
an example of the %TYPE attribute referring to another variable instead
of a table column.CALL emp_sal_query(7698);
Employee # : 7698
Name : BLAKE
Job : MANAGER
Hire Date : 01-MAY-81 00:00:00
Salary : 2850.00
Dept # : 30
Employee's salary is more than the department average of 1566.67