MySQL syntax error with declarations - mysql

Question

I am trying to create a transaction procedure in MySQL and I keep receiving the following syntax error which is occurring in my variable declarations:
ERROR 1064(42000): 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 ';
DECLARE emp_duplicate INT DEFAULT 0;
DECLARE old_empnum INT DEFAULT 0;
DECL' at line 6
Below is my procedure:
DELIMITER $$
DROP PROCEDURE IF EXISTS new_employee$$
CREATE PROCEDURE new_employee(in_Fname VARCHAR(15),in_Lname VARCHAR(15),
in_hire DATE, in_DOB DATE, in_sal Numeric(7,2))
BEGIN
DECLARE out_message VARCHAR;
DECLARE emp_duplicate INT DEFAULT 0;
DECLARE old_empnum INT DEFAULT 0;
DECLARE out_empnum INT DEFAULT 0;
DECLARE time_created DATETIME;
DECLARE user_var VARCHAR;
DECLARE age_var Int DEFAULT 0;
START TRANSACTION;
Select MAX(Empno)
Into old_empnum
From emp;
Select COUNT(*)
Into emp_duplicate
From emp
Where (in_Fname=Fname AND in_Lname=Lname AND in_hire=HireDate AND in_DOB=DOB);
IF emp_duplicate=0 THEN
SET out_message = 'New employee update successful';
SET out_empnum = old_empnum + 1;
SET time_created = CURRENT_TIMESTAMP();
SET user_var = USER();
SET age_var = DATEDIFF(CURRENT_DATE,in_DOB);
INSERT INTO emp(Empno,Fname,Lname,HireDate,DOB,SAL)
VALUES(in_Fname,in_Lname,in_hire,in_DOB,in_sal);
INSERT INTO log(Empno,DateCreated,Who)
VALUES(out_empnum,time_created,user_var);
SELECT out_message;
SELECT Empno, Fname, Lname, DATEDIFF(CURRENT_DATE,DOB), HireDate
From emp;
ELSE
SET out_message = 'Employee already exists';
SELECT out_message;
END IF;
COMMIT;
END$$
DELIMITER ;
I am using cmd and notepad to execute my code (just in case that's helpful). For the life of me, I cannot see the error with my declarations?????

Answer 1

you need to define the VARCHAR size like this
DECLARE out_message VARCHAR(20);
try this
BEGIN
DECLARE out_message VARCHAR(20); // // varchar size here
DECLARE emp_duplicate INT DEFAULT 0;
DECLARE old_empnum INT DEFAULT 0;
DECLARE out_empnum INT DEFAULT 0;
DECLARE time_created DATETIME;
DECLARE user_var VARCHAR(20); // varchar size here
DECLARE age_var Int DEFAULT 0;

Answer 2

you forget to datatype size for DECLARE out_message VARCHAR (30) and DECLARE user_var VARCHAR(30);
DECLARE out_message VARCHAR (30); <------------- here
DECLARE emp_duplicate INT DEFAULT 0;
DECLARE old_empnum INT DEFAULT 0;
DECLARE out_empnum INT DEFAULT 0;
DECLARE time_created DATETIME;
DECLARE user_var VARCHAR(30); <------------- here
DECLARE age_var Int DEFAULT 0;
In insert statement you are missing value for Empno
INSERT INTO emp(Empno,Fname,Lname,HireDate,DOB,SAL)
VALUES(in_Fname,in_Lname,in_hire,in_DOB,in_sal);