Problems with new users in MySQL

Question

I'm a novice in MySql and can't solve problem I've bumped into (Google search gave me no results). The problem is "error 1045 access denied for user" for new users.

I'm writing a small script on PHP that will automatically create new database in MySQL and add two new users with rights only for this database. Here is the code :

$dbh = new PDO("mysql:host=localhost", $root, $rootpass);

Connecting to MySQL server with superadmin rights.

$dbh->SetAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$dbh->exec("CREATE DATABASE new_db ;
            GRANT ALL PRIVILEGES
            ON new_db.*
            TO new_db_admin@localhost
            IDENTIFIED BY 'password';
            GRANT SELECT 
            ON new_db.*
            TO new_db_guest@localhost
            IDENTIFIED BY 'pass';
            FLUSH PRIVILEGES;"
);

With this script I want automatically create 2 new users for "new_db". First "new_db_admin" to work with database without involving of MySQL superadmin, and second to let users of the site coonect to database. ( IMHO that would be a good idea to give visitors rights "only to read", 'cause it will greatly reduce the possibility of SQL injection.)

After creating new DB and adding new users I create new connection to MySQL server with "new_db_admin" and add new tables. At this level everything works great. There are no problems with connecting to MySQL server from any user (new_db_admin, new_db_guest).

But after restarting MySQL server or restarting my PC I have "error 1045 access denied for user new_db_admin@localhost". Access to MySQL with another new user "new_db_guest" works good.

I tried to create only one user admin or guest. But after restarting MySQL server I got the same "error 1045 access denied for user new_db_admin@localhost" or if it was created only guest : "error 1045 access denied for user new_db_guest@localhost".Superadmin of MySQL server in all cases works good.

Could somebody help me to manage this troubles. I need a decision that would allow me to create new DB and new users for this DB automatically without having troubles in future.

ANY HELP WILL BE GREATLY APPRECIATED !

Here is the code I used to create users in MySQL via coomand line.

CREATE USER 'ADMIN'@'HOSTNAME' IDENTIFIED BY 'admin-pass';
SET PASSWORD FOR 'ADMIN'@'HOSTNAME' = PASSWORD('admin-pass');

GRANT ALL PRIVILEGES 
ON 'DBNAME'.*
TO 'ADMIN'@'HOSTNAME'
IDENTIFIED BY 'admin-pass';

CREATE USER 'GUEST'@'HOSTNAME' IDENTIFIED BY 'guest-pass';
SET PASSWORD FOR 'GUEST'@'HOSTNAME' = PASSWORD('guest-pass');

GRANT SELECT
ON 'DBNAME'.*
TO 'GUEST'@'HOSTNAME'
IDENTIFIED BY 'guest-pass';

FLUSH PRIVILEGES;

Answer 1

New Edit:

Also try executing "flush privileges" after the grant statements.

http://dev.mysql.com/doc/refman/5.0/en/privilege-changes.html

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Try splitting the Grant SQL into create user and then grant. I know you can write it the other way, but just see if it helps, even if just for debugging.

Something like:

CREATE USER 'jeffrey'@'localhost' IDENTIFIED BY 'mypass';
GRANT ALL ON db1.* TO 'jeffrey'@'localhost';

http://dev.mysql.com/doc/refman/5.1/en/grant.html

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