Query query = HibernateSessionFactory.getInstance()
                  .getCurrentSession().createQuery(
                        "from Users where username=:username").setString(
                        "username", username);

      Users u = (Users) query.uniqueResult();

select users0_.ID as ID5_, users0_.version as version5_, users0_.NAME as NAME5_, users0_.USERNAME as USERNAME5_, users0_.EMAIL as EMAIL5_, users0_1_.STATUS as STATUS6_, users0_1_.FK_PLANNER_PLANNERCOMPANY as FK4_6_, users0_1_.PHONE as PHONE6_, case when users0_1_.ID is not null then 1 when users0_.ID is not null then 0 end as clazz_ from USERS users0_ left outer join PLANNER users0_1_ on users0_.ID=users0_1_.ID where users0_.USERNAME=?

import ...;


@Entity
@Table(name = "PLANNER", uniqueConstraints = {})
public class Planner extends Users implements Cloneable {

   // Fields

   private List<TechnicalChangePart> changeParts;
   
   private List<UploadedPackage> uploadedPackages;
   
   private Plannercompany plannercompany;

   private String phone;

   private List<Orders> orderses = new ArrayList<Orders>(0);

   private PlannerStatus status;   

   @OneToMany(cascade= {CascadeType.PERSIST}, fetch=FetchType.LAZY, mappedBy="planner")
   @Cascade (org.hibernate.annotations.CascadeType.SAVE_UPDATE)
   public List<TechnicalChangePart> getChangeParts() {
      return changeParts;
   }

   public void setChangeParts(List<TechnicalChangePart> changeParts) {
      this.changeParts = changeParts;
   }

   @ManyToOne(cascade = {CascadeType.PERSIST}, fetch = FetchType.LAZY)
   @JoinColumn(name = "FK_PLANNER_PLANNERCOMPANY", unique = false, nullable = true, insertable = true, updatable = true)
   @Cascade (org.hibernate.annotations.CascadeType.SAVE_UPDATE)
   private Plannercompany getPlannercompanyx() {
      return this.plannercompany;
   }

   private void setPlannercompanyx(Plannercompany plannercompany) {
      this.plannercompany = plannercompany;
   }
   
   @Transient   
   public Plannercompany getPlannercompany() {
      return getPlannercompanyx();
   }
   @Transient
   public void setPlannercompany(Plannercompany plannercompany) {
      
      if (this.plannercompany != null) {
         this.plannercompany.getPlanners().remove(this);
      }
      
      if (plannercompany != null) {
         plannercompany.getPlanners().add(this);
      }
      
      this.plannercompany = plannercompany;
   }

   @Column(name = "PHONE", unique = false, nullable = true, insertable = true, updatable = true, length = 50)
   public String getPhone() {
      return this.phone;
   }

   public void setPhone(String phone) {
      this.phone = phone;
   }

   @Enumerated(EnumType.ORDINAL)
   @Column(name = "STATUS", unique = false, nullable = false, insertable = true, updatable = true, length = 1)
   public PlannerStatus getStatus() {
      return this.status;
   }

   public void setStatus(PlannerStatus status) {
      this.status = status;
   }

   @OneToMany(cascade = { CascadeType.PERSIST }, fetch = FetchType.LAZY, mappedBy = "plannerx")
   @Cascade (org.hibernate.annotations.CascadeType.SAVE_UPDATE)
   public List<Orders> getOrderses() {
      return this.orderses;
   }

   public void setOrderses(List<Orders> orderses) {
      this.orderses = orderses;
   }
   
   
   
   @OneToMany(cascade= {CascadeType.PERSIST}, fetch= FetchType.LAZY, mappedBy="planner")
   @Cascade (org.hibernate.annotations.CascadeType.SAVE_UPDATE)
   public List<UploadedPackage> getUploadedPackages() {
      return uploadedPackages;
   }

   public void setUploadedPackages(List<UploadedPackage> parts) {
      this.uploadedPackages = parts;
   }

}

import ...;

@Entity
@Table(name = "USERS",  uniqueConstraints = {})
@Inheritance(strategy = InheritanceType.JOINED)
public class Users extends HibernateObject {

   // Fields

   private String username;

   private String email;

   private String name;

   private List<TechnicalChange> technicalChanges = new ArrayList<TechnicalChange>(
         0);

   private List<PostOfficeUser> postOfficeUsers = new ArrayList<PostOfficeUser>(0);

   @Column(name = "USERNAME", unique = true, nullable = false, insertable = true, updatable = true, length = 100)
   public String getUsername() {
      return this.username;
   }

   public void setUsername(String username) {
      this.username = username;
   }

   @Column(name = "EMAIL", unique = false, nullable = true, insertable = true, updatable = true, length = 200)
   public String getEmail() {
      return this.email;
   }

   public void setEmail(String email) {
      this.email = email;
   }

   @Column(name = "NAME", unique = false, nullable = true, insertable = true, updatable = true, length = 200)
   public String getName() {
      return this.name;
   }

   public void setName(String name) {
      this.name = name;
   }

   @OneToMany(cascade = { CascadeType.PERSIST }, fetch = FetchType.LAZY, mappedBy = "usersx")
   @Cascade (org.hibernate.annotations.CascadeType.SAVE_UPDATE)
   public List<TechnicalChange> getTechnicalChanges() {
      return this.technicalChanges;
   }

   public void setTechnicalChanges(List<TechnicalChange> technicalChanges) {
      this.technicalChanges = technicalChanges;
   }

   @OneToMany(cascade = { CascadeType.PERSIST }, fetch = FetchType.LAZY, mappedBy = "usersx")
   @Cascade (org.hibernate.annotations.CascadeType.SAVE_UPDATE)
   public List<PostOfficeUser> getPostOfficeUsers() {
      return this.postOfficeUsers;
   }

   public void setPostOfficeUsers(List<PostOfficeUser> postOfficeUsers) {
      this.postOfficeUsers = postOfficeUsers;
   }

}