How to log MySQL errors to the error file?

[eluser]MatteMatte[/eluser]
[quote author="WanWizard" date="1280762234"]Modify the display_error() method of DB_driver to write the error to the logfile?

Or alter the error_db.php error file to write a log entry if you don't feel like modifing core classes.[/quote]

Thanks for your reply WanWizard. In db connection config, "$db['default']['db_debug']" is set to false. Will display_error() of DB_driver be triggered once $db['default']['db_debug'] is set to false?

Thanks!