Honestly, this looks like a query and analysis system that could be built on top of a column store so you don't need to deal with the storage part of the system

Honestly, this looks like a query and analysis system that could be built on top of a column store so you don't need to deal with the storage part of the system yet. (I'm a big KBD+ fan). I like this idea because it allows for reusing an existing engine and, what is important, integrate it with many different engines (which might have already quite sophisticated mechanisms of data managements). Yet, such an engine has to expose quite low-level operations with data. Also, there has to be support for user-defined functions (lambdas).