MySQL Stored Procedure DEFINER=`root`@`%` is not working in localhost?

First of all, you need to check the host. The host can be ‘localhost’ or ‘%’. Check the existence of user accounts with host −

mysql> select user,host from MySQL.user;

This will produce the following output −

+------------------+-----------+
| user             | host      |
+------------------+-----------+
| Bob              | %         |
| User2            | %         |
| mysql.infoschema | %         |
| mysql.session    | %         |
| mysql.sys        | %         |
| root             | %         |
| @UserName@       | localhost |
| Adam Smith       | localhost |
| David            | localhost |
| James            | localhost |
| John             | localhost |
| John Doe         | localhost |
| User1            | localhost |
| am               | localhost |
| hbstudent        | localhost |
| mysql.infoschema | localhost |
| mysql.session    | localhost |
+------------------+-----------+
17 rows in set (0.00 sec)

Now, we are going to change the definer for user Bob and host is ‘%’. Following is the query to create a stored procedure with definer −

mysql> DELIMITER //
   mysql> CREATE DEFINER=`Bob`@`%` PROCEDURE `Message`()
      BEGIN
        select "Hello World";
        END
        //
   Query OK, 0 rows affected (0.14 sec)
mysql> DELIMITER ;

Now call the stored procedure with the help of CALL command −

mysql> call `Message`();

This will produce the following output −

+-------------+
| Hello World |
+-------------+
| Hello World |
+-------------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.01 sec)