plugin=diff is not implemented.
http://yellow.ribbon.to/~tuotehhou/index.php?%2BSqlServer%2B%E3%83%8D%E3%83%83%E3%83%88%E3%83%AF%E3%83%BC%E3%82%AF%E6%8E%A5%E7%B6%9A%E3%82%92%E6%9C%89%E5%8A%B9%E3%81%AB%E3%81%99%E3%82%8B
plugin=diff is not implemented.