Hi Albe,
Thanks. I will study it.
Regards.
Grace
At 2012-06-14 15:33:07,"Albe Laurenz" <laurenz.albe@xxxxxxxxxx> wrote: >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