Hibernate query "or condition" won't work

Question

I am trying the following hibernate query but it always gives me a wrong result:

    @SuppressWarnings("unchecked")
    @Override
    public List<Jcelulasmin> getAllOthers(int id, String username) {
        Session session = this.sessionFactory.getCurrentSession();
        List<Jcelulasmin> JcelulasList = session.createQuery("from Jcelulasmin where jgrelhas.id=? and (jconcorrentes is null or jconcorrentes.users.username <> ?) order by id").setParameter(0, id).setString(1, username).list();
        for(Jcelulasmin p : JcelulasList){
            logger.info("Jcelulas List::"+p);
        }
        return JcelulasList;
    }

This query returns me 13 values, but that should be the result of "jconcorrentes.users.username <> ?"

The result of "jconcorrentes is null" is 47 values so my query should return 47+13=60...

I'm trying to achieve the following SQL query that actually returns 60 values:

SELECT * FROM `jcelulas` WHERE GrelhasId=1 and (ConcorrentesId is null or ConcorrentesId<>1) 

ps:jconcorrentes.id is 1 so the sql and hql should be the same

Table/Entitiy definition:

@Entity
@Table(name = "jconcorrentes", catalog = "7jogos")
public class Jconcorrentes implements java.io.Serializable {

    private Integer id;
    ....
    private Users users;


@ManyToOne(fetch = FetchType.EAGER)
    @JsonBackReference
    @JoinColumn(name = "username", unique = true, nullable = false)
    public Users getUsers() {
        return this.users;
    }

    public void setUsers(Users users) {
        this.users = users;
    }

I tried the following and it actually worked:

session.createQuery("from Jcelulasmin where jgrelhas.id=? and (jconcorrentes is null or jconcorrentes <> 1) order by id").setParameter(0, id).list();

The only problem is that i have to get it by username which is in Users.

Users:

@Entity
@Table(name = "users", catalog = "7jogos", uniqueConstraints = @UniqueConstraint(columnNames = "username"))
public class Users implements java.io.Serializable {

@NotEmpty(message="Não se esqueça do Email")
@Email(message="Email Inválido")
private String username;
...
private Set<Jconcorrentes> jconcorrenteses = new HashSet<Jconcorrentes>(0);


@OneToMany(fetch = FetchType.EAGER, mappedBy = "users")
    public Set<Jconcorrentes> getJconcorrenteses() {
    return this.jconcorrenteses;
}

public void setJconcorrenteses(Set<Jconcorrentes> jconcorrenteses) {
    this.jconcorrenteses = jconcorrenteses;
}

Answer 1

Your current query translates to inner join between Jcelulasmin and jconcorrentes (because of jconcorrentes.users.username), thus nulls are excluded. You have to explicitly left join them:

select j from Jcelulasmin j left join j.jconcorrentes jcon ...