Hey Guys, I know its stupid question.
I wanted to change the structure of column by adding it as a key but instead of that I just gave "update columnfamily <CFname>;". It dropped all the other column except my pre existing key column. I can't afford to lose the data. Is there a way I can retreive the data by revoking this command. I see that data files are in places. Any help will be much appreciated. Thanks Dhamodaran