> In the business environment > it's often not know, and the flexibility in this regard provided by > relational databases is part of what has made them so popular.
Only if the schema makes it possible to get what you want. And, even if it does, the cost may be excessive. > If > your only window > to your business knowledge is accessible via GAE, you're in a serious > problem each time your requirements do not fall into the realm of what > you anticipated. Nope. The difference is that GAE's query language is weaker so you have to do more in user code, such as joins and aggregations. Relational databases write this code for you. However, regardless of who writes this code, it has to be run. Maybe the query optimizer will write better code than you do, but maybe it won't. On Apr 12, 1:03 pm, Consultuning <consultun...@gmail.com> wrote: > > Pushing calculations from read time to write time makes sense in that reads > > seriously out number writes for most web applications. > > Pushing calculations at write time instead of read time has some other > very very strong implication that you're probably missing: that you > know in advance what you want to calculate. For very narrow > application domains this is probably true. In the business environment > it's often not know, and the flexibility in this regard provided by > relational databases is part of what has made them so popular. > > For Google own apps this is not probably a problem, since they have > other means of processing massive amounts of data. If your only window > to your business knowledge is accessible via GAE, you're in a serious > problem each time your requirements do not fall into the realm of what > you anticipated. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
