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From "Juergen Saar" <juer...@jsaar.org>
Subject Re: Relationships across databases
Date Thu, 21 Jun 2007 06:05:53 GMT
Cayenne is a Framework that brings one of the best ORM available
and it would be foolish to implement such a horrible scenarium.

I think this special problem has to be solved by YOU
and not by the cayenne-team

Sorry ...
--- Juergen ---

2007/6/20, Øyvind Harboe <oyvind.harboe@zylin.com>:
>
> In the link below it says that relationships does not work across
> databases "as it will require Cayenne to do in memory cartesian
> product processing".
>
> What does this qualifier mean? Does it mean that it is possible to
> enable this, but it would take a lot of memory? That this feature was
> considered, but rejected as it would have not worked in all cases?
>
> For the cases that we need this, there is no problem for Cayenne to
> have both tables completely in memory (always < 1000 records) so I'm
> not concerned about CPU processing power or memory consumption.
>
> Has any work been done on supporting this?
>
>
>
> We've got a real database (Derby) that has relationships to other
> existing datbases(MS Access/FoxPro databases). We can't move the
> existing databases into Derby due to bug-by-bug compatibility
> problems.
>
> http://cwiki.apache.org/CAY/multiple-databases-example.html
>
> --
> Øyvind Harboe
> http://www.zylin.com - eCos ARM & FPGA  developer kit
>

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