Does an UPDATE become an implied INSERT

Question

For Cassandra, do UPDATEs become an implied INSERT if the selected row does not exist? That is, if I say

 UPDATE users SET name = \         


        

Answer 1

What one can do is this however:

UPDATE table_name SET field = false WHERE key = 55 IF EXISTS;

This will ensure that your update is a true update and not an upsert.