Hi Anant -
I think it would result a very in-efficient query. The data would have to travel from the client - over the network - to the Vertica cluster *every time* that flex table would be queried.
I would not even consider this idea. And the Vertica architects, rightly, in my eyes, would not even consider such a possibility to become a necessity.
First, load a table in Vertica, using a COPY <table> FROM LOCAL '<file>'.
Then, query it as often as you need.