title: How to search on all indexed fields on Solr
body: <p>I have several fields indexed on Solr and need to search on all the indexed fields.</p>
  <p>Should I use a copyField for this purpose or is there something out of the box?</p>
  <p>Solr documentation is not really helpful and I was unable to apply the solutions given here.</p>
  <p>I also use SolrJ on the backend so something on that end would be helpful too.</p>
  <p>I use Solr 7.4.0 for now.</p>