I'm learning Esper, CEP Processing engine, but I can't understand about view and window.
There are so looks like, but I feel something difference. But I cant understand it. someone say to me about that simply?
thx for read, and sry for my not good english.
A data window is a view that always retains a set of events. A derived-value view is a view that does not retain events and instead outputs some derived information. Both are views i.e. can be used in the from-clause together with other views.