Supposing I have table with columns a, b, c, d, e
Is there a way/syntax to update columns d and e from out parameters of procedure/function that takes in parameters values of columns a, b and c. (procedure(a, b, c, out d, out e))
(other than using a cursor to iterate through all rows one by one)?
You could create a PL/SQL tables or user defined records, like so
Function to process records
FUNCTION Get_updated_recs(p_emp_id emp.emp_id%TYPE,
p_manager_id emp.manager_id%TYPE)
RETURN EMP_REC_TYPE
IS
p_emp_rec EMP_REC_TYPE;
BEGIN
IF p_emp_id = 100 THEN
p_emp_rec.salary := 50000;
p_emp_rec.bonus := 10000;
END IF;
RETURN p_emp_rec;
END get_updated_recs;
Main program unit
DECLARE
TYPE emp_rec_type IS RECORD (
salary employees.salary%TYPE,
bonus employees.bonus );
emp_rec EMP_REC_TYPE;
BEGIN
FOR emp IN (SELECT *
FROM employees) LOOP
emp_rec := Get_updated_recs(emp.emp_id, emp.manager_id);
UPDATE employees
SET salary = emp_rec.salary,
bonus = emp_rec.bonus
WHERE emp_id = emp.emp_id;
END LOOP;
END;
I haven't tested/compiled it, just wrote out of my memory but something like this should work
With help of an Oracle expert I arrived at following solution:
CREATE TABLE testtable
(
a number,
b number,
c number,
d number
);
CREATE TYPE testobj AS OBJECT
(
x number,
y number
);
CREATE OR REPLACE FUNCTION testfun(a number, b number)
RETURN testobj IS
begin
return new testobj(x=>a+b, y=> a*b);
end;
INSERT INTO testtable VALUES (1,2,null,null);
INSERT INTO testtable VALUES (5,6,null,null);
UPDATE
(SELECT tt.*,
testfun1(a,b) fun_ret FROM testtable tt) talias
SET talias.c=talias.fun_ret.x,
talias.d=talias.fun_ret.y
;
Do as follows:
(1) Create and fill an example table:
CREATE TABLE TEST1
(
a NUMBER(10), b number (10), s number (10)
);
INSERT INTO TEST1 (a, b, s) VALUES (2, 3, NULL);
INSERT INTO TEST1 (a, b, s) VALUES (3, 12, NULL);
INSERT INTO TEST1 (a, b, s) VALUES (-2, 8, NULL);
(2) Create a simple function for the using in an UPDATE command:
CREATE OR REPLACE FUNCTION GET_SUM (x IN NUMBER, y IN NUMBER)
RETURN NUMBER
IS
x1 NUMBER(10) := x; y1 NUMBER (10):= y; s NUMBER(10) := NULL;
BEGIN
IF x1 IS NOT NULL AND y1 IS NOT NULL THEN s := x1 + y1; END IF;
RETURN s;
END;
(3) Use this function in the following UPDATE command:
UPDATE TEST1 SET s = GET_SUM (a, b);
(4) Check the updates:
select * from TEST1;
