protected function sqlComment($buffer_id)
	{
		if (isset($this->buffers[$buffer_id])) {
			foreach ($this->buffers[$buffer_id] as $buf) {
				echo $this->indent, '-- ', str_replace(array("\r", "\n"), array('', "\n".$this->indent.'-- '), $this->sqlRawBuffer($buf)), "\n";
			}
		}
	}