title: 2 JPA entities on the same table
body: <p>Let's say I've a table with 200 columns and most of them are never used.</p>
  
  <p>I map SmallEntity to the 10 columns that are used often. I use it in the associations with other entities. It loads fast, consume few memory and makes me happy.</p>
  
  <p>But sometimes I need to display the 200 columns. I'd like to map the BigEntity class on the 200 columns. It is bound to no other entity, it has no association.</p>
  
  <p>Question: Do you have any experience doing that? Are you aware of any trouble that Hibernate would have, as for example in first level cache, dirty checking and entity lifecycle in general?</p>