Embedded object JPQL query failing!!

Question

Hi,
   I am getting following query compilation error while starting the server. Not finding issues in my model classes.
   Kindly let me know the mistakes I made in the query.
Exception [EclipseLink-8030] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.JPQLException
Exception Description: Error compiling the query [TempTransactionTransformAuditQuery:
select obj from TempTransactionTransform obj where obj.tempTransactionTransformPK.altIdType= :altIdType and obj.tempTransactionTransformPK.actualValue= :actualValue and obj.tempTransactionTransformPK.altenateValue= :altenateValue], line 1, column 82: unknown state or association field [altIdType]
of class [com.test.model.TempTransactionTransformPK].
My Classes are:
@Entity
@Table(name="T_TRANSACTION_TRANSFORM")
public class TempTransactionTransform{
    /** Creates a new instance of TempTransactionTransform */
    public TempTransactionTransform() {
    @Id
    @Embedded
    @AttributeOverrides({
    @AttributeOverride(name = "altIdType", column = @Column(name="ALT_ID_TYPE")),
    @AttributeOverride(name = "altenateValue", column =  @Column(name="ALT_FIELD_VALUE")),
    @AttributeOverride(name = "actualValue", column =  @Column(name="ACTUAL_FIELD_VALUE"))
    public TempTransactionTransformPK tempTransactionTransformPK;
    @Column(name="FIELD_NAME")
    protected String fieldName;
    @Column(name="ALT_ID_SUB_TYPE")
    private String altIdSubType;
    @Column(name="TRANS_NARRATION")
    private String transNarration;
    @Column(name = "AMC_CODE")
    protected String amcCode;
    public TempTransactionTransformPK getTempTransactionTransformPK() {
        return tempTransactionTransformPK;
    public void setTempTransactionTransformPK(TempTransactionTransformPK tempTransactionTransformPK) {
        this.tempTransactionTransformPK = tempTransactionTransformPK;
    public String getFieldName() {
        return fieldName;
    public void setFieldName(String fieldName) {
        this.fieldName = fieldName;
    public String getTransNarration() {
        return transNarration;
    public void setTransNarration(String transNarration) {
        this.transNarration = transNarration;
  public String getAmcCode() {
        return amcCode;
  public void setAmcCode(String amcCode) {
  this.amcCode = amcCode;
==================================================================
@Embeddable
public class TempTransactionTransformPK{
    public TempTransactionTransformPK() {
    public String altIdType;
    public String altenateValue;
    public String actualValue;
    public TempTransactionTransformPK(String altIdType,String altenateValue,String actualValue){
         this.altIdType = altIdType;
         this.altenateValue = altenateValue;
         this.actualValue = actualValue;
  public String getAltIdType() {
       return altIdType;
  public void setAltIdType(String altIdType) {
       this.altIdType = altIdType;
  public String getAltenateValue() {
       return altenateValue;
  public void setAltenateValue(String altenateValue) {
       this.altenateValue = altenateValue;
  public String getActualValue() {
       return actualValue;
  public void setActualValue(String actualValue) {
       this.actualValue = actualValue;
Thanks,
Mahendran..

Answer 1

Hi,
as Mitesh already pointed out, comparison of embedded instances is not supported by the Java Persistence query language. The BNF allows comparing entitry instances, but not embeddeds. The only thing you can do in a query with an embedded instance is navigate through it (see chapter 4.4.4 Path Expressions). So your first query comparing the fields of the embedded instead of the embedded itself is the right thing to do.
Regards Michael