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From "Rick Curtis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OPENJPA-2258) OpenJPA is firing separate query for embedded class in the entity though annotted at @EagerFetchMode(FetchMode.JOIN)
Date Thu, 06 Sep 2012 13:41:07 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-2258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449652#comment-13449652
] 

Rick Curtis commented on OPENJPA-2258:
--------------------------------------

Can you please post a unit test that shows this behavior?
                
> OpenJPA is firing separate query for embedded class in the entity though annotted at
@EagerFetchMode(FetchMode.JOIN)
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: OPENJPA-2258
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-2258
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: jpa
>    Affects Versions: 2.1.2
>         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
>            Reporter: Sandip Bhoi
>            Priority: Minor
>              Labels: OpenJPA, Performance
>
> 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.

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