Create a table in Cassandra 1.2 with CQL3 where column names will be created at runtime

Question

I want to store snapshots of an object in Apache Cassandra 1.2

Row key is the Object#ID and there will be a column for each snapshot.

--------    latest  --------   v2   -------- v1
id-122      100     --------   50   -------- 66
--------

So column names are created dynamically at runtime.

How to create the previous table in Cassandra 1.2 using CQL3?

Answer 1

You would use the compound primary key feature of CQL3:

CREATE TABLE foo (
  object_id int,
  version int,
  value int,
  PRIMARY KEY (object_id, version));

Answer 2

In CQL3, Table schema is fixed. So you can't really get dynamic column names. For that you have to switch to CQL2.