[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2060) To be able to use <generator> with <composite-id>

[Paul Benedict (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_30223 ] 

Paul Benedict commented on HHH-2060:
------------------------------------

Alternative solution: can be done by writing a CompositeUserType together with an IdentifierGenerator:
http://forum.hibernate.org/viewtopic.php?p=2374438

> To be able to use <generator> with <composite-id>
> -------------------------------------------------
>
>                 Key: HHH-2060
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2060
>             Project: Hibernate3
>          Issue Type: Improvement
>    Affects Versions: 3.2.0.cr4
>         Environment: Hibernate 3.x
>            Reporter: Xavier Brénuchon
>         Attachments: hibernate.core.trunk.core.patch, hibernate.core.trunk.testsuite.patch
>
>
> Hello, 
> This is the continuation of HB-389
> We develop an application which has very strong need for performance with several tens of million recordings. Partitioning is a need.
> So for that, I use <composite-id>. But my primary key is not a natural key, but a real technical key :
>  - column of partitioning for optimization of the data base 
>  - column of technical id
> So I need to have a generator, for exemple :
>     <composite-id name="id" class="IdPartition">
>         <key-property name="org" type="string" column="ORG"/>
>         <key-property name="id" type="long" column="ID"/>
>         <generator class="fr.test.xavier.IdPartitionGenerator">
>             <param name="table">TAB_SEQ</param>
>             <param name="column">LAST</param>
>         </generator>
>     </composite-id>
> The good news is that Hibernate can use that (HB-389).
> In fact, it is enough to modify the DTD to authorize <generator> in <composite-id> and it is all. The current code of Hibernate manages it very well. 
> Is it possible that Hibernate is enriched by this functionality?

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