title: N+1 problem when fetching OneToOne select
body: <p>I have a table A which has one to one mapping of table B.
  B has one To many mapping of table C.</p>
  <p>When I write  <code>select a from A a LEFT JOIN FETCH a.B</code></p>
  <p>Query runs N+1 time to fill values of C in B.</p>