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From Marc Prud'hommeaux <mprud...@apache.org>
Subject Re: Historical Session
Date Mon, 21 May 2007 18:22:31 GMT

Something like: "select x from Employee x as x was on January 1, 2002"



On May 21, 2007, at 11:01 AM, Kevin Sutter wrote:

> Sorry to show my ignorance, but what are "historical objects"?   
> Thanks!
>
> Kevin
>
> On 5/18/07, Ricardo Andere de Mello <wytwyg@gmail.com> wrote:
>>
>> ok, I'm sending this message to netmind list too, so they can  
>> answer my
>> next
>> question too:
>>
>> * Maybe this is a silly question, but is it possible to place  
>> netmind's
>> beankeeper historical structure between OpenJPA and the database
>> backstore?
>>
>> I dont think *any* serious commercial application can avoid  
>> historical
>> objects.
>> I think netmind's beankeeper is a great thing, and JPA is a good  
>> standard.
>> Mixing both projects would be very cool. ;-)
>>
>> []s, gandhi
>>
>>
>> 2007/5/18, Marc Prud'hommeaux <mprudhom@apache.org>:
>> >
>> >
>> > Sadly, no. We don't have any built-in support for historical  
>> support
>> > at this time, although we have thought for a long time that this
>> > would be a great feature to have.
>> >
>> > You can, of course, do it yourself manually with a bunch of
>> > persistent Date fields, but I agree that this is pretty  
>> cumbersome to
>> > have to manage yourself.
>> >
>> >
>> >
>> > On May 18, 2007, at 11:27 AM, Ricardo Andere de Mello wrote:
>> >
>> > > Does OpenJPA have something similar to TopLink's "AsOfClause" ?
>> > >
>> > > I've been working for some time with OJB and Hibernate, and I'm
>> > > work a lot
>> > > with historical objects.
>> > > It really sucks to manage lots of classes to build a historical
>> > > structure of
>> > > objects and object relations.
>> > >
>> > > Netminds beankeeper does a great job about this, but I'd like to
>> > > adhere to
>> > > JPA...
>> > >
>> > > Any idea of implementing historical objects AND RELATIONS,  
>> inside JPA?
>> > >
>> > > --
>> > > Ricardo Andere de Mello
>> > > Presidente do Quilombo Digital
>> > > 55 (11) 3271-7928 / 55 (11) 9917-7722
>> >
>> >
>>
>>
>> --
>> Ricardo Andere de Mello
>> Presidente do Quilombo Digital
>> 55 (11) 3271-7928 / 55 (11) 9917-7722
>>


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