title: elasticsearch search query for exact match not working
body: <p>I am using query_string for search. Searching is working fine but its getting all records with small letters and capital letters match.But i want to exact match with case sensitive?
  For example :
  Search field : "title"
  Current output :</p>
  
  <ol>
  <li>title</li>
  <li>Title</li>
  <li>TITLE,</li>
  </ol>
  
  <p>I want to only first(title). How to resolved this issue.</p>
  
  <p>My code in java :</p>
  
  <p>QueryBuilder qbString=null;</p>
  
  <p>qbString=QueryBuilders.queryString("title").field("field_name");</p>