node to traverse cannot be null (Hibernate SQL)

Question

I\'m performing a SQL query through hibernate, which looks like:

SELECT thi 
FROM track_history_items thi 
JOIN artists art 
  ON thi.artist_id = art.id 
WHERE t         


        

Answer 1

If you are using Hibernate 4 you should be calling:

Query query = session.getNamedQuery(Entity.NAMED_QUERY);

instead of

Query query = session.createQuery(Entity.NAMED_QUERY);

This happens because session.createQuery will try to create the query based on the string value of Entity.NAMED_QUERY for example:

String NAMED_QUERY = "Entity.namedQuery";

resulting in a incorrect HQL and raising a exception.