The only thing I have to add at this point is that with frameworks such as
Cayenne, there is less benefit in trying to put all data in the same
database, so
perhaps in the future we're going to see more rather than less
applications sitting
on top of heterogeneous databases?
Converting databases to the same underlying database yields, hopefully,
no visible change to the application and it is harder to get that sort of work
funded in a project.
-- Øyvind Harboe http://www.zylin.com - eCos ARM & FPGA developer kit
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