title: Arithmetic operations using Criteria
body: <p>I want to perform an arithmetic operation using Criteria API in hibernate. The SQL is:</p>
  
  <pre><code>SELECT salary + 500 FROM EMPLOYEE;
  </code></pre>
  
  <p>How to achieve this using Criteria?</p>
  
  <p>I am able to retrieve only the SALARY column using <code>Projection</code> but after that not sure how to perform the arithmetic operation on that:
      session.createCriteria(Employee.class).setProjection(Projections.projectionList().add(Projections.property("salary"))</p>
  
  <p>Please let me know about this.</p>
  
  <p>Regards,</p>