Posted by Igor Stasenko on Apr 08, 2010; 7:32am
URL: https://forum.world.st/Experiences-with-non-RDBs-tp1753935p1765211.html

On 8 April 2010 10:02, Friedrich Dominicus
<[hidden email]> wrote:
> Friedrich Dominicus <[hidden email]> writes:
>
>> I just  wonder about experiences with non relational databases like e.g
>> - Magma
>> - Gemstone
>> - others
> Ok to  get a bit more concrete assume I have a simple inheritance as
> in the  example
>
[snip]

> Or asked anotherway. How is inheritance handled in the diverse
> persistence tools..
>
> Another question is how easy or difficult is it to have let's say
> something like a person with addresses, phone numbers etc.
>
> How would I have to query let's say the street address of a certain
> Person. e.g
>
I can't say for OR mappers, but for OODBs like Gemstone or Magma,
everything is handled seamlessly.
You need to care only about your data model, and can do anything, what
naturally you
want to do with your data. OODB handling all of it behind the scenes.
All what is you have to do is to designate the transaction boundaries,
where you dealing with data,
so you can abort /commit it at some logical point.
The rest of stuff can be used without caring about persistence - you
working with objects as if they
are just objects , as if you having your data in image. As simple as that.

Of course, there are indexes and other helpful stuff, which could help
you work more efficiently with larger data sets,
but it is optional.
So, while in RDBMS your are a servant of database (because you have to
follow all requirements
for every query/data model you put there), with OODB - it is a
database your servant and doing everything
for you, without much interference and without dictating you how your
data structures should be organized.
So, i think this answering your question about inheritance: if you
need inheritance, just use it. :)



--
Best regards,
Igor Stasenko AKA sig.

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