Unable to update Data to DB : org.hibernate.hql.internal.QueryExecutionRequestException: Not supported for DML operations - spring

Question

i was trying to update database tables by using following Hibernate Query Language
#RequestMapping(value = "/update",method = RequestMethod.POST)
public #ResponseBody String update(#RequestParam(value = "score1",required = true) String score1,
#RequestParam(value = "score2",required = true) String score2,
#RequestParam(value = "score3",required = true) String score3,
#RequestParam(value = "score4",required = true) String score4,
#RequestParam(value = "id",required = true)String id,
Model model)
{
SessionFactory sessionFactory=new Configuration().configure("hibernate.cfg.xml")
.addAnnotatedClass(User.class)
.addAnnotatedClass(UserDetail.class)
.addAnnotatedClass(UserScores.class).buildSessionFactory();
Session session=sessionFactory.getCurrentSession();
try
{
System.out.println("ID is"+id);
session.beginTransaction();
session.createQuery("update UserScores u set " +
"u.score1=:score1," +
"u.score2=:score2," +
"u.score3=:score3," +
"u.score4=:score4 where u.ID=:id")
.setParameter("score1",score1)
.setParameter("score2",score2)
.setParameter("score3",score3)
.setParameter("score4",score4)
.setParameter("id",id);
session.getTransaction().commit();
session.close();
}
catch (Exception e)
{
System.out.println(e);
}
return score1+score2+score3+score4;
}
after executing this code, it doesnt give any error , but the data is not updated in the database
what is the problem in executing this code

Answer 1

Its working, i tried it in another way
#RequestMapping(value = "/update",method = RequestMethod.POST)
public #ResponseBody String update(#RequestParam(value = "score1",required = true) String score1,
#RequestParam(value = "score2",required = true) String score2,
#RequestParam(value = "score3",required = true) String score3,
#RequestParam(value = "score4",required = true) String score4,
#RequestParam(value = "id",required = true)String id,
Model model)
{
SessionFactory sessionFactory=new Configuration().configure("hibernate.cfg.xml")
.addAnnotatedClass(User.class)
.addAnnotatedClass(UserDetail.class)
.addAnnotatedClass(UserScores.class).buildSessionFactory();
Session session=sessionFactory.getCurrentSession();
try
{
session.beginTransaction();
System.out.println("ID is"+id);
UserScores userScores=session.get(UserScores.class,Integer.parseInt(id));
userScores.setScore1((Double.parseDouble(score1)));
userScores.setScore2((Double.parseDouble(score2)));
userScores.setScore3((Double.parseDouble(score3)));
userScores.setScore4((Double.parseDouble(score4)));
session.update(userScores);
session.getTransaction().commit();
session.close();
}
catch (Exception e)
{
System.out.println(e);
}

Answer 2

The query that you are creating needs to be executed using query.executeUpdate()
session.beginTransaction();
Query query = session.createQuery("update UserScores u set " +
"u.score1=:score1," +
"u.score2=:score2," +
"u.score3=:score3," +
"u.score4=:score4 where u.ID=:id");
query.setParameter("score1",score1)
query.setParameter("score2",score2)
query.setParameter("score3",score3)
query.setParameter("score4",score4)
query.setParameter("id",id);
query.executeUpdate();
session.getTransaction().commit();
session.close();
An alternative way is to make changes to the persistent entities. In this case the updates will be automatically propogated.