Info on enforcing ring constraints?

  • Hi,

      Does anyone have any information or resources to check regarding enforcing ring constraints?  Did any of previous versions of ORM tools generate code to enforce all types of ring constraints, or just the comments sections I've seen that pass that responsibility on to the DB implementor? 

      As the various types of ring constraints are very useful in conceptual modeling, I'm guessing that the reason they haven't been (fully), enforced by auto generated code for physical implementation is due to the difficulty in generating that code - or that such code tends to break, rather than augment, connections between the conceptual and physical representations of the model.

      If you have any references to the problem, or personal experience regarding the topic, please pass them along.  Thanks  BRN..