MySQL Stored Procedure: Boolean Logic in IF THEN

Question

I'm looking for the proper syntax (if this is possible in MySQL stored procedures) for using logical operators in an IF THEN statement. Here's something along the lines of what I would like to do, but I'm not certain if I should type "OR" or "||" in the IF ... THEN clause:

DELIMITER $$

CREATE PROCEDURE `MyStoredProc` (_id INT)
BEGIN

  DECLARE testVal1 INT DEFAULT 0;
  DECLARE testVal2 INT DEFAULT 0;

  SELECT value1, value2 INTO testVal1, testVal2 
    FROM ValueTable 
   WHERE id = _id;

 IF testVal1 > 0 OR testVal2 > 0 THEN

   UPDATE ValueTable 
      SET value1 = (value1+1) 
    WHERE id=_id;

 END IF;

END$$

Answer 1

I've just tried your procedure to be sure it works, and it does. Also, you should consider specifying the length of your variable's types, eg. INT(10).

Both the OR and || operators are correct (as stated in the Reference Manual).