How to change the key of row in cassandra?

I need to change(to update it with new value) the key of row in cassandra. How can i do that? Of course i can select all rows with previos key and then insert their columns with new key, and delete th开发者_StackOverflow中文版e previos rows. this is too hard. maybe there is another way to solve this prolem?

Unfortunately you can't change the key of a row - that would incur too much overhead (for example, you might have to move the row to a different host).

What you could do is copy the entire row and insert it again with your new row key.