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DBI / mySQL: Access denied for user 'myusername'@'localhost' (using password: YES)

by TedPride (Priest)
on Mar 07, 2006 at 04:32 UTC ( #534830=perlquestion: print w/replies, xml ) Need Help??

TedPride has asked for the wisdom of the Perl Monks concerning the following question:

When I run this code (assume database, user, pass are defined and correct):
use DBI; print "Content-Type: text/html\n\n "; my $dbh = DBI->connect("DBI:mysql:$database", $user, $pass) or print " +<BR>Couldn't connect to database: " . DBI->errstr;
I get the following error:

Couldn't connect to database: Access denied for user 'myusername'@'localhost' (using password: YES)

From looking around, I find that this is caused by mySQL updating its password encryption and leaving DBI lagging behind. What I want to know is, is there a way to connect to my mySQL server anyway using DBI? Or should I switch to Mysql.pm (no user input is used in the queries, security isn't a major concern - but I'd need a sample of code to use)? Or do I have to figure out how to get a new version of DBI installed on my hosting account? Usually I'd bypass all the trouble by using PHP (EVIL EVIL FLAME FLAME), but in this case I need a script I can call from shell, so PHP isn't going to cut it. And in case anyone asks, I did try Super Search first - it just turned up a million posts on mySQL, unrelated to my problem.

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Re: DBI / mySQL: Access denied for user 'myusername'@'localhost' (using password: YES)
by perrin (Chancellor) on Mar 07, 2006 at 05:36 UTC
    There's no trick here -- the permissions are setup incorrectly for this user. Try it from the shell. MySQL has a somewhat confusing distinction about users who can connect over a local socket. See the MySQL docs on creating user accounts for more help.
Re: DBI / mySQL: Access denied for user 'myusername'@'localhost' (using password: YES)
by hesco (Deacon) on Mar 07, 2006 at 09:37 UTC
    Although you clearly state that we should "assume database, user, pass are defined and correct," that is not what your error message is telling us. DBI->errstr should return the error from the database engine, itself.

    Try, from a prompt, the command line client:

    $ mysql -u myusername -p
    Your grant statement must grant specific privileges on certain tables to a user @ a domain, identified by 'a password'. If you have root on the db engine, you can use show fields from mysql.tablename and select from mysql.* to see what the mysql installation thinks its valid users are. Do these tokens work at a cli client?

    -- Hugh

Re: DBI / mySQL: Access denied for user 'myusername'@'localhost' (using password: YES)
by idle (Friar) on Mar 07, 2006 at 07:15 UTC

      If the error idle linked to is the problem that TedPride is having, the solution is to install mySQL 5 locally, so you have the correct shared libraries, and then reinstall DBD::mysql.

      However, I'd be interested to know the success/failure case of trying to connect using the given credentials from the command line, as I find that's the most common problem given that error message.

      Have you got solution. I am also facing same problem. Please share solution.
Re: DBI / mySQL: Access denied for user 'myusername'@'localhost' (using password: YES)
by TedPride (Priest) on Mar 07, 2006 at 15:08 UTC
    Well, you guys were right - the password was incorrect. Someone set it to something different from the main account password. Thanks for eliminating the impossible and telling me how to check the possible :)

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