public function insert()
    {
        self::$instance->reset();
        $this->sql('INSERT INTO ' . $this->oosql_table);

        $arg_list = func_get_args();
        $numargs = func_num_args();

        if ($numargs > 0) {
            $this->oosql_numargs = $numargs;
            $this->sql(' (');

            $this->sql(implode(',', $arg_list));

            $this->sql(')');
        }
        $this->oosql_insert = true;
        return $this;
    }