mysql create user if not exists

Question

I have a query to check mysql users list for create new user.

IF (SELECT EXISTS(SELECT 1 FROM `mysql`.`user` WHERE `user` = \'{{ title }}\')) = 0 THEN
    CR         


        

Answer 1

I use

SELECT EXISTS (SELECT DISTINCT user FROM mysql.user WHERE user = "username") as is_user

should return 1 if exists or 0 if it does not

Answer 2

In 5.7.6 and above, you should be able to use CREATE USER

CREATE USER IF NOT EXISTS 'user'@'localhost' IDENTIFIED BY 'password';

Note that the 5.7.6 method doesn't actually grant any permissions.

---

If you aren't using a version which has this capability (something below 5.7.6), you can do the following:

GRANT ALL ON `database`.* TO 'user'@'localhost' IDENTIFIED BY 'password';

This will create the user if it doesn't exist

---

Note, if you are on MySQL 8, the GRANT ALL method will not create a user.