Issue in adding two outputs from MySQL function inside another function - mysql

Question

CREATE DEFINER=`root`#`localhost` FUNCTION `F_GetProjectCostPerEmployeeInProject`(id VARCHAR(20)) RETURNS DECIMAL(30,2)
BEGIN
DECLARE e_id VARCHAR(20);
DECLARE finished INT ;
DECLARE temp DECIMAL(30,2);
DECLARE temp2 DECIMAL(30,2);
DECLARE TotalCostOfEmployees DECIMAL(30,2);
DECLARE cur CURSOR FOR SELECT DISTINCT e_id FROM project_employee WHERE project_id=id;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET finished = 1;
emploop : LOOP
FETCH cur INTO e_id;
IF finished =1 ;
LEAVE emploop;
END IF ;
SET TotalCostOfEmployees = TotalCostOfEmployees + ( F_TotalManDaysPerEmployee(e_id,id)*(F_GetEmployeeGradeSal(e_id));
END LOOP emploop;
RETURN TotalCostOfEmployees;
END$$
The problem is its giving error at line :
SET TotalCostOfEmployees = TotalCostOfEmployees + ( F_TotalManDaysPerEmployee(e_id,id)*(F_GetEmployeeGradeSal(e_id));
This is the error :
Error Code : 1064 You have an error in
your SQL syntax; check the manual that
corresponds to your MySQL server
version for the right syntax to use
near '; leave emploop; end if ;
set TotalCostOfEmployees = TotalCostOfEmploy' at line 12

Answer 1

Use the SELECT ... INTO clause
SELECT TotalCostOfEmployees + ( F_TotalManDaysPerEmployee(e_id,id)*(F_GetEmployeeGradeSal(e_id))
INTO TotalCostOfEmployees;

Answer 2

Why are you using a cursor for this at all?
SELECT SUM(F_TotalManDaysPerEmployee(e_id, id) * F_GetEmployeeGradeSal(e_id)) AS TotalCostOfEmployees
FROM (
SELECT DISTINCT e_id
FROM project_employee
WHERE project_id = id
) q

Answer 3

I solved it via this way:
enter code BEGIN DECLARE e_id VARCHAR(20);
DECLARE finished INT ;
DECLARE salary DECIMAL(30,2);
DECLARE TotalCostOfEmployees DECIMAL(30,2) ;
DECLARE cur CURSOR FOR SELECT DISTINCT Emp_code FROM project_employee WHERE project_id=p_id;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET finished = 1;
SET finished = 0;
OPEN cur;
SET TotalCostOfEmployees =0.0;
emploop : LOOP
FETCH cur INTO e_id;
IF finished = 1 THEN
LEAVE emploop;
END IF ;
SELECT COALESCE( (F_TotalManDaysPerEmployee(e_id,p_id)* F_GetEmployeeGradeSal(e_id))/22,0.0)
INTO salary;
SET TotalCostOfEmployees = TotalCostOfEmployees + salary;
/*SELECT (TotalCostOfEmployees + ifnull(salary,0.0)) into TotalCostOfEmployees; */
END LOOP emploop;
CLOSE cur;
RETURN TotalCostOfEmployees;
END$$