MySQL Stored procedure IN parameter issue - mysql

Question

In my Mysql , I have written below stored procedure to insert data into user table,
DELIMITER $$
DROP PROCEDURE IF EXISTS `CreateUser1`$$
CREATE PROCEDURE `CreateUser1`(
IN Email VARCHAR(50),
IN Password1 VARCHAR(50),
IN FirstName VARCHAR(50),
IN LastName VARCHAR(50),
IN AlternateEmail VARCHAR(50),
IN PhoneNumber VARCHAR(50),
IN Token VARCHAR(500)
)
BEGIN
IF NOT EXISTS( SELECT user_id FROM `um.user` WHERE `email`=Email)THEN
INSERT INTO `um.user`(site_id,email,PASSWORD,alternate_email,first_name,last_name,contact_number,
created_on,updated_on,is_active,token,is_verified_email)
VALUES
(1, Email1 , Password1 ,AlternateEmail, FirstName , LastName ,PhoneNumber,UTC_TIMESTAMP(),UTC_TIMESTAMP(),1,Token,0);
END IF;
END$$
DELIMITER ;
When i test this procedure as below,
CALL `CreateUser1`('ab1#ansys.com' , 'abcdefgh' ,'abc#gmail.com', 'sa' , '' ,'123456789','hasghsdfhgfhgfhdgfhdsgsh');
SELECT * FROM `um.user` WHERE email='ab1#ansys.com';
It does nothing.
It doesn't insert data into table, I figured out the issue .
The isssue is in parameter "Email".
But when I change the parameter "Email" to "Email12" , it worked as expected.
But I don't want to change in parameter as it will be a change in my API as well,
Now i want to solve this issue in sp level as well, I have tried below changes as well in SP which also doesn't works,
Set #userEmail=Email;
IF NOT EXISTS( SELECT user_id FROM `um.user` WHERE `email`=#userEmail)THEN
Any suggestions
Regards
Sangeetha

Answer 1

You may also qualify their identifiers. See 9.2.1 Identifier Qualifiers.
...
/*
-- You can also use Alias
SELECT `user_id`
FROM `um.user` `uu`
WHERE `uu`.`email` = `Email`
*/
IF NOT EXISTS (SELECT `user_id`
FROM `um.user`
WHERE `um.user`.`email` = `Email`) THEN
...
SQL Fiddle demo unqualified
SQL Fiddle demo qualified

Answer 2

Try this if you want to handle your issue within the stored procedure itself, without changing the name of parameter,
DELIMITER $$
DROP PROCEDURE IF EXISTS `CreateUser1`$$
CREATE PROCEDURE `CreateUser1`(
IN Email VARCHAR(50),
IN Password1 VARCHAR(50),
IN FirstName VARCHAR(50),
IN LastName VARCHAR(50),
IN AlternateEmail VARCHAR(50),
IN PhoneNumber VARCHAR(50),
IN Token VARCHAR(500)
)
BEGIN
DECLARE Email1 VARCHAR(50);
SET Email1 = Email;
IF NOT EXISTS( SELECT user_id FROM `um.user` WHERE `email`=Email1)THEN
INSERT INTO `um.user`(site_id,email,PASSWORD,alternate_email,first_name,last_name,contact_number,
created_on,updated_on,is_active,token,is_verified_email)
VALUES
(1, Email1 , Password1 ,AlternateEmail, FirstName , LastName ,PhoneNumber,UTC_TIMESTAMP(),UTC_TIMESTAMP(),1,Token,0);
END IF;
END$$
DELIMITER ;
This is because in MySQL, the parameter name passed to a Stored Procedure should not be the same as Column Name. Hope this solves your problem :)