title: Cassandra : DELETE doesn't work
body: <p>I have a table like this :</p>
  
  <pre><code>CREATE TABLE ab(group int,timestamp varchar,ab_id uuid, PRIMARY KEY (group,timestamp,ab_id)) WITH CLUSTERING ORDER BY (timestamp DESC);
  </code></pre>
  
  <p>layout:</p>
  
  <pre><code>1 | 2015-04-01 08:48:46 | 07d2a30d-79f3-5619-bbdd-6e5140a68ec3
  1 | 2015-04-01 08:47:24 | 08d3a40c-85c7-5823-ddcc-7e6174d78dg4
  1 | 2015-04-01 08:46:33 | c35dedeb-3144-5818-c282-53cd7ee1e8e8
  </code></pre>
  
  <p>I can use insert and select queries but I can't delete a row.
  I must use all primary keys because DELETE is reserved so I tried :</p>
  
  <pre><code> DELETE FROM ab WHERE ab_id=2d1ddf9a-2e80-41ea-b891-e322edfb905e  AND "timestamp"='2015-04-02 03:29:54' AND group = 1;
  </code></pre>
  
  <p>But nothing happened, no message error and no row deleted ... ??</p>