title: solr search, avoid defaultSearchField
body: <p>I have a solr search problem, currently our schema is setup have the following</p>
  
  <pre><code>&lt;field name="trading_name" type="trading_name" indexed="true" stored="false" required="true" multiValued="false" omitNorms="true" /&gt;
  &lt;field name="trading_name_notoken" type="string" indexed="true" stored="false" required="true" multiValued="false" omitNorms="true" /&gt;
  ...
  &lt;copyField source="trading_name" dest="trading_name_notoken" /&gt;
  ...
  &lt;defaultSearchField&gt;trading_name&lt;/defaultSearchField&gt;
  ...
  &lt;fieldType name="trading_name" class="solr.TextField" positionIncrementGap="100"&gt;
   &lt;analyzer&gt;...
  </code></pre>
  
  <p>I want to search on trading_name_notoken field instead of trading_name field, how should I build my search query?</p>
  
  <p>Cheers</p>
  
  <p>James</p>