Change the type of a column in Cassandra
<p>I have created a table <code>my_table</code> with a column <code>phone</code>, which has been declared as of <code>type varint.</code> After entering some data, I realized that it would have been better if I had declared this column as <code>list&lt;int&gt;.</code> </p>

<p>I tried to:</p>

<pre><code>ALTER TABLE my_table
ALTER phone TYPE list&lt;int&gt;
</code></pre>

<p>but unfortunately I am not allowed to do so. Hopefully, there is a way to make this change.</p>

<p><strong>UPDATE:</strong> Assume that I make a new column <code>phonelist</code> of <code>type list&lt;int&gt;</code>.  Is there any efficient way to move the data in the <code>phone</code> column into the <code>phonelist</code> column? </p>