leaf_yxj wrote:
> Thanks for your answers. I really appreciate it. Although I don't
understand the whole things you guys
> mentioned to me. I think maybe I should do it by myself. I need to do
a test. If there is any good
> guide/white paper, please give me a link for me to study.
I think the documentation is quite good and comprehensive:
http://www.postgresql.org/docs/current/static/xfunc-c.html
If you look for samples, the contrib modules will serve.
Yours,
Laurenz Albe