MySQL - Syntax Error in Stored Procedure using `if`

Question

I need to know what is the error in the following stored procedure, as begging with mySql I can\'t understand what is the error

if not EXISTS( select filesr         


        

Answer 1

You have not used THEN keyword and END IF.

Try this:

SET @ExistedRefID = NULL;
SELECT ReferenceID INTO @ExistedRefID 
FROM filesrefrences 
WHERE RefrenceKey= pRefrenceKey;

IF (@ExistedRefID IS NULL) THEN 
    INSERT INTO filesrefrences(RefrenceKey, RefrenceCount)
    VALUES(pRefrenceKey,1);
    SELECT LAST_INSERT_ID();
ELSE
    UPDATE filesrefrences
    SET RefrenceCount= RefrenceCount+1
    WHERE ReferenceID= @ExistedRefID;
    SELECT @ExistedRefID;
END IF;