title: Modify SQL query generated behind Spring Data REST projections
body: <p><strong>EDIT :</strong> 
  How to Keep only needed columns in SELECT for Spring Data Rest Projections?</p>
  
  <p>Spring Data Rest Projections are good for getting a subset of columns for links which are generated, but the Query that gets generated in behind still has all columns in it. </p>
  
  <p>How can Projections be created where also SQL queries have only those columns in SELECT which are in Projection</p>