Create new user in MySQL

[gmishra]

dear monks, i have to write a program, that takes database name, new user name and password as input from the user and create the database. I have written the following program.

use DBI;

    $drh = DBI->install_driver("mysql");
    $database ='testg1';
    $host ="localhost";
    $user = "root";
    $password = "passowrd";

    $rc = $drh->func('createdb', $database, $host, $user, $password, '
+admin');
    if ($rc == 1){print"new database created.."; }
            else{print "could not create database: $DBI::errstr\n";}
    
#####################################
######database created successfully
#####################################

####################################
### the following segment is giving problem
#####################################
    
    #  the datasource
    
    $dbname =  'testg1';
    my $db="$dbname:164.xxx.x.xxx:yyyy";
    my $dbh = DBI->connect("DBI:mysql:$db",$user,$password) or die("ca
+nt connect\n");
    print "connected";

###########################################
###### because of the error, i dont reach the following ##segment
############################################
    $auser = 'newuser@localhost';
    $pw = 'abcd';

    my $query = qq|GRANT ALL on $db.* TO ? IDENTIFIED BY ?|; 
    $dbh->do($query,undef,$auser,$pw) || die ("Could not do $query - E
+rror: $DBI::errstr");
###########################################

Though i am able to make the new database, i am not able to use it to create new user and grant rights. I am getting the following error.

DBI->connect(testg1:164.xxx.x.xxx:yyyy) failed: Access denied for user
+: 'root@myhost' (Using password: YES) at create.pl line 19
cant connect

I can connect through the MySql console using same username and password. I can also create dtabase and grant rights etc from there. But through thr program, i am getting the "cant connect" error. Please help.

[jaa]

You should issue the GRANT first - before you attempt to connect to the database.

The MySQL user authentication is actually managed in the mysql database - e.g. your list of users is in mysql.user.

Note that if you manipulate the mysql.* tables the changes do not take effect until you issue a reload.

[gmishra]

hey thanks.
But i need a database handle($dbh) to run the "grant" right? how dow do i make the handle.. unless i connect. Also, what is "reload"?
Please help. I am very new in this area.
waiting,
gauravi

[jaa]

Use the $drh handle that you already have to issue the GRANT. If you use GRANT you dont need to worry about RELOAD

You should look over the documentation at www.mysql.com/documentation/index.html esp the section on setting up users http://www.mysql.com/documentation/mysql/bychapter/manual_MySQL_Database_Administration.html#Adding_users