title: Feature 'Backup of a database containing a columnar table' is not supported by MemSQL
body: <p>MemSQL doesn't support backup of columnar tables:</p>
  
  <pre><code>memsql&gt; backup database stat to '/data/memsql-backup';
  ERROR 1706 (HY000): Feature 'Backup of a database containing a columnar table' is not supported by MemSQL.
  </code></pre>
  
  <p>How to organize online backup in this case? Through export to CSV? </p>