JavaHibernate/JPA返回空值列表

Question

我有这样一个实体：

@Entity
@Table(name = "MY_TABLE")
public class OrderPackage implements Serializable { 

   @EmbeddedId
   @AttributeOverrides({ 
        @AttributeOverride(name = "pId", column = @Column(name = "P_ID")),
        @AttributeOverride(name = "prId", column = @Column(name = "PR_ID")),
        @AttributeOverride(name = "pin", column = @Column(name = "PIN")),
        @AttributeOverride(name = "Id", column = @Column(name = "MN_ID"))       
   })
   private PackageId id;

   @Column(name = "MEM_ID")
   private Long memberId;

    .....
    .....
   // more fields and getters and setters
}

包装。阶级

@Embeddable
public class PackageId implements Serializable {

   private String pId;
   private String prId;
   private String pin;
   private Long Id;

    // getters and setters
}

Mytable具有与我的查询匹配的以下字段：

SELECT c FROM OrderPackage c where <condition> order by c.prId;

匹配如下记录：

  MN_ID     MEM_ID       P_ID            PR_ID           PIN       ///some other fields
  6217      402022795    A1000005361     B1000077615     (null)
  6213      402022795    A1000005361     B1000037615     (null)
  6218      402022795    A1000005361     B1000087615     (null)
  6215      402022795    A1000005361     B1000057615     (null)

MNU ID在这里是唯一的

我数到四。但是列表中的所有空行

这可能是什么原因造成的

jBoss 4.2.x
JPA
Hibernate
ORACLE

更新：

还是这样吗？（当复合键中的任何一个字段都有空值时，它将为整行返回空值）

http://thelittlefellow.blogspot.com/2011/07/hibernate-gethibernatetemplatefind.html

https://hibernate.atlassian.net/browse/HHH-177