Problem with JPA @Embeddable class field in @Embedded

Question

I have a Embeddable class and Embadded in all of my JPA Entities, the version(in DBUniqueId) field is mandatory for some JPA Entities and for others it should not be present.
My DBUser.java JPA Entity shouldn't have version field(DBUser table doesn't have one) and so I didn't include it in @AttributeOverrides of DBUser.java. when I try to run the JPA query it results in exception
Query:
List<DBUser> userList = (List<DBUser>)entityManager.createQuery(SELECT u FROM DBUser u WHERE u.userId.root=?1 AND u.userId.extension=?2).setParameter(1,"root1").setParameter(2,"ext1").getResultList ();
And The Exception is:
---- Begin backtrace for Nested Throwables
java.sql.SQLException: ORA-00904: "T0"."VERSION": invalid identifier
     at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:74)
     at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:131)
How do I inform to JPA Entity to ignore only the version field of the Embeddable in my JPA Entity @Embedded place.
So the above query can successful. Thank You!
Please guide me to solve this problem.
@Embeddable
@MappedSuperclass
public class DBUniqueId implements Serializable {
* serialVersionUID.
private static final long serialVersionUID = 8903598739796209331L;
* root.
private String root;
* extension.
private String extension;
* version.
private String version;
     //Getters & Setters
@Entity
@Table(name = "MyTable", schema = "MySchema")
public class DBUser implements Serializable {
* unique user id.
private DBUniqueId uniqueUserId;
* Get the unique user id.
* @return <code>DBUniqueId</code> - unique person id
@Embedded
@AttributeOverrides( {
@AttributeOverride(name = "root", column = @Column(name = "LUSR02_ID_ROOT", nullable = true, length = 50)),
@AttributeOverride(name = "extension", column = @Column(name = "LUSR02_ID_EXT", nullable = true, length = 50))
public DBUniqueId getUserId () {
return uniqueUserId;
* set user unique id.
* @param uniqueId - unique id of the person
public void setUserId (final DBUniqueId uniqueId) {
this.uniqueUserId = uniqueId;
}

Answer 1

Sudeep Naidu wrote:
Hello gimbal2,
Thanks for your response...
In my project I have created a class with name DBVersionUniqueId but my lead said no to it.
Only DBUniqueId should be used and make it work with or with out version fields.
I tried experimenting around, but didn't succeed.
Please Suggest some solution to make it work with DBUniqueId class.
Thank You.No, let your lead write the code. He/she seems to be the expert. I certainly have no clue how to do it and honestly I also cannot find any reason why it should be possible. Let me put what is required in other words:
- you have an entity with three properties, all of which are not transient. This means these properties map to three columns in the database according to the JPA specs.
- you have a table with only two properties
- you must and you shall use the object with three properties but at the same time one of the fields must all of a sudden be ignored by the persistence provider
It makes no sense to want to do that.
Correct answer: create a new object with only the two fields so the database and the object model match exactly
Wrong answer: try to create workarounds that in six months time nobody is going to understand why the hell it was done that way