More detailed database error reporting/logging?

[eluser]maria clara[/eluser]
this is an example in my database/mysql/mysql_driver.php for the mysql_error message:

Code:

/**
     * The error message string
     *
     * @access    private
     * @return    string
     */
    function _error_message()
    {
        return mysql_error($this->conn_id); //conn_id is a function in my session
    }
//--------------------------------------------------------------------------
     /**
     * The error message number
     *
     * @access    private
     * @return    integer
     */
    function _error_number()
    {
        return mysql_errno($this->conn_id);
    }

hope this can help you.