Using of @SqlResultSetMapping

Question

Hello,
I try to use mapping for native queries. My code is(entities are created with JDeveloper wizard's help as "Entity from Table"):
Levels.java:
@SqlResultSetMappings({
@SqlResultSetMapping(name="findAllLvlDscFull",
entities={@EntityResult(entityClass=Levels.class),
@EntityResult(entityClass=Descriptions.class)}),
@SqlResultSetMapping(name="findAllLvlDscNames",
columns={@ColumnResult(name="lvl_name"),
@ColumnResult(name="dsc_name")})
@Entity
public class Levels implements Serializable {
private Long id;
private String name;
private Descriptions descriptions;
public Levels() {
@Id
@Column(nullable = false)
public Long getId() {
return id;
public void setId(Long id) {
this.id = id;
@Column(nullable = false)
public String getName() {
return name;
public void setName(String name) {
this.name = name;
@ManyToOne
@JoinColumn(name = "DSC_ID", referencedColumnName = "ID")
public Descriptions getDescriptions() {
return descriptions;
public void setDescriptions(Descriptions descriptions) {
this.descriptions = descriptions;
Description.java:
@Entiy
public class Descriptions implements Serializable {
private String description;
private Long id;
private List<Levels> levelsList;
public Descriptions() {
public String getDescription() {
return description;
public void setDescription(String description) {
this.description = description;
@Id
@Column(nullable = false)
public Long getId() {
return id;
public void setId(Long id) {
this.id = id;
@OneToMany(mappedBy = "descriptions")
public List<Levels> getLevelsList() {
return levelsList;
public void setLevelsList(List<Levels> levelsList) {
this.levelsList = levelsList;
For first SqlResultSetMapping I use below code - it works nice.
Query query = em.createNativeQuery("SELECT * FROM LEVELS lvl, DESCRIPTIONS dsc WHERE"+
" lvl.dsc_id = dsc.id", "findAllLvlDscFull");
List resultList = query.getResultList();
For second SqlResultSetMapping I use such code:
Query query = em.createNativeQuery("SELECT lvl.name lvl_name, dsc.description dsc_name FROM LEVELS lvl, DESCRIPTIONS dsc WHERE"+
" lvl.dsc_id = dsc.id", "findAllLvlDscFull");
It doesn't work: I get such error
Exception [TOPLINK-6044] (Oracle TopLink Essentials - 2006.8 (Build 060829)): oracle.toplink.essentials.exceptions.QueryException
Exception Description: The primary key read from the row [DatabaseRecord(
     LEVELS.ID => null
     LEVELS.NAME => null
     LEVELS.DSC_ID => null)] during the execution of the query was detected to be null. Primary keys must not contain null.
Query: ResultSetMappingQuery(com.desyde.tms.model.entity.Levels)
The same error I get every time I want to use aliases for fields:
@SqlResultSetMapping(name="findAllDsc",
entities={@EntityResult(entityClass=Descriptions.class,
fields={@FieldResult(name="id", column="dsc_id"),
@FieldResult(name="description", column="dsc_name")})
Query query = em.createNativeQuery("SELECT dsc.id AS dsc_id, dsc.description AS dsc_name FROM DESCRIPTIONS dsc", "findAllDsc");
List list = query.getResultList();
Could somebody give an advice how to solve this problem?
Thanks in advance.

Answer 1

Is anyone using ResultSetMapping? How do U implement mapping for NativeQueries(with aliases and set of data from several tables via @ColumnResults and @FieldResults)?(I've tried to do it in JDev 10.1.3.1 - have got above problems)