we begin "pg external table" need your advice

Hi all:

I begin an “pg external table” in pgfoundry (http://pgfoundry.org/projects/pgexternaltable/  ), you can find the doc (brief and detail design)from that URL.

I am newbie to postgresql, and this code still have many defects and low efficiency. I am very happy to get advice from you!

Thank you!

Best wishes,

maosen