I have the following model: Country (name*, List<City>) City (name*, List<Event>) Event (id*, description, timeGMT, List<Ticket>, List<Performer>) Ticket (id*, type, price, quantity) Performer(id*, band, startTime)
So this is a 4-level deep model. Here is some of the query I want to run: All Country that has Event that occurs after a specific date All City from a specific Country that has Event that occurs after a specific date All Event from a specific City that has Event that occurs after a specific date With these 3 queries I can create an interface where a user select a country, then the city and finally gets the events. I won’t be able to do these queries with my current model but I read that denormalization is usually the answer. Is there a reference document explaining denormalization? >From what I read, to run the query I want, I will have to duplicate the country and city name in the event entity. Then I will be able to run the query with no join. Denormalization looks like a SQL View except that it is stored. Thanks -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
