Sorry if I haven't been more clear. What I'd like is to do that query efficiently when I don't know t1 precisely, I
just want to get the latest columns before a time T
That can be done currently with Thrift but will return all columns with time t < T, while this way I can efficiently
get just the latest
Note that "as of" type queries are very common in financial type applications for example, so it's worth considering this
I'm not sure about the handling of deleted keys but maybe we can find a way to generalize and expose this ? I would have asked for a feature like this anyway, it just so happens that looking at the code I see this has been done to support CQL limits
Since I have an object serialization client API on top of Thrift, CQL is not much use to me...