[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3808) Manual fetching of associations

[Ovidio Mallo (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=32651#action_32651 ] 

Ovidio Mallo commented on HHH-3808:
-----------------------------------

Any feedback on this? Maybe we were not talking about the same thing?

> Manual fetching of associations
> -------------------------------
>
>                 Key: HHH-3808
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3808
>             Project: Hibernate Core
>          Issue Type: New Feature
>          Components: core
>            Reporter: Ovidio Mallo
>
> In performance critical parts of an application, batch fetching and subselect fetching not always allow for an efficient and specific prefetching of entity associations. Therefore, I wanted to propose to add some API which allows to prefetch a given association for a user defined set of entities. This could be something like
>     Session#fetch(Class ownerClass, Serializable[] ownerIds, String propertyName)
> or
>     Session#fetch(Class ownerClass, Object[] owners, String propertyName)
> or something similar. The method would then load the association for the given entities (just like batch fetching would do) and put the associations in the session cache for later usage.
> I think this would greatly help when performance really matters and you want to have full control about the set of entities on which an association is fetched.

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