Terry schrieb:

Dear Sir,

I had spent a lot of time to find a hint.

Anyone could show me the hints. How to manipulate the large object in PostgreSQL from Zope ?

I'm not sure what exactly you mean, a better description of your problem would be necessary. If you think of "how to deal with BLOBs", see e. g. http://www.zope.org/Members/murphy/MySQL-BLOBs Or search at Zope.org and Google. Martin