The solution is just you´ve said: to insert the geom columns yourself.
I´ve got a view with a buffer from a polygon table and it refreshes
dynamically when i change one polygon from the polygon table, so you can
insertect by the fly a point table with your buffer, for example ( creating
another view).
Maybe is just tricky, and performance can´t be the best, but it works. You
can construct your database schema with inherent geoprocessing :)
Gus
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