Re: Searching OO Associations with RDBMS Persistence Models
From: Robert Martin <unclebob_at_objectmentor.com>
Date: Mon, 19 Jun 2006 21:13:11 -0400
Message-ID: <2006061921131175249-unclebob_at_objectmentorcom>
Date: Mon, 19 Jun 2006 21:13:11 -0400
Message-ID: <2006061921131175249-unclebob_at_objectmentorcom>
On 2006-06-16 16:03:30 -0400, "Aloha Kakuikanu" <aloha.kakuikanu_at_yahoo.com> said:
> Assume network is an [indirected] graph. Then logical connection is a
> path in the graph. There is nothing challenging in modelling graph in
> RDBMS and creating application objects that correspond to paths in a
> graph. Why "object id" is significant in this picture?
Agreed. There is nothing challenging about representing the connection object I described within an RDBMS. However, there was no NEED. Connections were not persistent. They were computational objects whose existence was transient.
Thus, they had no key; and keys were not used to identify them.
-- Robert C. Martin (Uncle Bob) | email: unclebob_at_objectmentor.com Object Mentor Inc. | blog: www.butunclebob.com The Agile Transition Experts | web: www.objectmentor.com 800-338-6716 |Received on Tue Jun 20 2006 - 03:13:11 CEST