[OPENJPA-2258] OpenJPA is firing separate query for embedded class in the entity though annotted at @EagerFetchMode(FetchMode.JOIN)

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.1.2
• Component/s: jpa
• Labels: OpenJPA Performance
• Environment: WebSphere Platform 8.0.0.2 [BASE 8.0.0.2 cf021148.03]; Host Operating System is Windows XP, version 5.1; Java version = 1.6.0, Java Compiler = j9jit26, Java VM name = IBM J9 VM; Orb Version = IBM Java ORB build orb626-20111107.00
• Assignee: Unassigned
• Reporter: Sandip Bhoi
• Created: 06/Sep/12 04:44
• Updated: 06/Sep/12 13:39

Description

I have a Embedded class in my entity which has some common similar columns for all the tables.

e.g

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

//... some specific fields here

@Embedded
@EagerFetchMode(FetchMode.JOIN)
private CommonRowDetails commonRowDetails;

//...getters and setter below
}

And the class CommonRowDetails contains some audit columns as

@Embeddable
public class CommonRowDetails implements Serializable {

@Column(name = "ROW_ADD_STP", updatable = false)
private Date rowAddStp;

@Column(name = "ROW_ADD_USER_ID", updatable = false)
private String rowAddUserId;

@Column(name = "ROW_UPDATE_USER_ID")
private String rowUpdateUserId;

@Column(name = "ROW_UPDATE_STP")
private Date rowUpdateStp;

//...getters and setter below

}

All above columns are part of same table "MY_TABLE"
So when I select the entity MyTable, I can see a separate query is getting executed for selecting (ROW_ADD_STP, ROW_ADD_USER_ID, ...) which is definitely not required. I also added the annotation @EagerFetchMode(FetchMode.JOIN) on field CommonRowDetails to select those with join/in same query.
Please help me to know, how to avoid OpenJPA firing a separate query.