Given the limitations of the serialized approach, let's drop our text column and replace it with a collection column of the same name. Cassandra offers three flavors of collections: lists, sets, and maps. We'll explore all three in this chapter, starting with a set column, which is the most appropriate for our starred_by_users column:
ALTER TABLE "user_status_updates" DROP "starred_by_users"; ALTER TABLE "user_status_updates" ADD "starred_by_users" SET<text>;
The last line introduces a new syntax to define a collection column type. The new column that we have created is a collection column using the SET data structure; the values it contains have type text. Like normal scalar data columns, collection columns ...
