title: How to add columns dynamically in a column family in cassandra using cql
body: <p>I want to add columns dynamically to this column family via code using cql.</p>
  
  <pre><code>CREATE COLUMN FAMILY blog_entry
  WITH comparator = UTF8Type
  AND key_validation_class=UTF8Type
  AND default_validation_class = UTF8Type;
  </code></pre>
  
  <p>how shall I do it?</p>