[hibernate-issues] [Hibernate-JIRA] Assigned: (HHH-5228) In Envers, retrieve only the most recent revision for all entities of a particular type

[Gail Badner (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gail Badner reassigned HHH-5228:
--------------------------------

    Assignee: Adam Warski

> In Envers, retrieve only the most recent revision for all entities of a particular type
> ---------------------------------------------------------------------------------------
>
>                 Key: HHH-5228
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5228
>             Project: Hibernate Core
>          Issue Type: Improvement
>          Components: envers
>    Affects Versions: 3.3.2
>         Environment: any
>            Reporter: Edwin Tellman
>            Assignee: Adam Warski
>            Priority: Minor
>
> I would like to retrieve the most recent version of everything that has changed since a specified revision.  This is useful for keeping one application synchronized with another.  One system polls the other and the second system provides the current state of things that have changed recently.
> This query fetches everything that has changed since the specified revision:
> AuditQuery query = auditReader.createQuery()
>          .forRevisionsOfEntity(entityClass, false, true)
>          .add(AuditEntity.revisionNumber().gt(revision))
> If I add a maximize restriction on the revision number, I get a single item which changed at the highest revision number, which isn't what I'm looking for.
> You could find the right data in SQL or HQL by grouping by ID and then selecting the maximum revision from each group.
> And, of course, I can use the above query and then filter out the older items from the result in Java, which is what I'm doing now.

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