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Issue 20: relationship alias or macro
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Reported by funnyso...@gmail.com, Jun 15, 2009
Assuming we have tables something like:
car-map-feature
that relates features to cars... many-to-many.

We'd like to say car.features or feature.cars.

Could the relation specification system accommodate some general
specification for essentially giving an alias for an arbitrary path walking
a chain of relations.

Kinda like a macro - the alias expands to its 'primitive' relations.

Similarly... order.shipments, product.buyers, etc

And of course, we'd like to put constraints on any of the intermediate
tables, perhaps also through another alias.


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