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Circular dependency?

Could you explain the meaning of Circular Dependency please. I am seeing it frequently displayed without an obvious (to me) cause.

For example looking at a table which has Object Dependencies:

Table X
Used By
...
Uses
- Circular dependency X
- Circular dependency X
- Circular dependency X
- Circular dependency X
- Default rule etc...

What are the repeated Circular dependencies intended to indicate?

thanks,
nigel.
nigwil
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  • Bart Read
    Hi Nigel,



    Thanks for this. I suspect this may be a function of your diagram options, in that this happens in the default viewing mode, where constraints are not shown on the diagram as objects in their own right, but rather as self-dependencies on the tables on which they are defined. Hence you end up seeing a lot of circular dependencies in the bottom-right hand pane, which shows what an object uses/is used by.

    We're looking at doing something about this for the final release, although at this stage I can't really say what that might be. However for the time being check out the two buttons on the right-hand side of the toolbar immediately above the diagram. One of these allows you to toggle between the two constraint viewing modes, so you can choose to see constraints as full objects on the diagram, and their circular dependencies will disappear. The other allows you to show/hide dependencies on file groups. Both of these buttons are designed to help remove some of the clutter from your diagrams, but obviously it's sometimes helpful to see the additional information.

    Hope this helps you out.


    Many thanks,
    Bart Read
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