From: Hannes Wyss <hannes.wyss@...>
Date: 2006-02-08T05:12:11+09:00
Subject: Re: [ANN] ODBA 1.0.2

Hi Konstantin

On 2/7/06, konsu <konsu@hotmail.com> wrote:
> 1. from your response to an earlier question it seems that odba stores the
> data in a form which is not "interpreteable" by the underlying storage
> engine. for example, if the store is a sql database you won't be able to
> write sql queries to search for objects with particular properties unless
> you read them from the database using your ruby layer. which means that when
Correct.
> i need to search i have no choice but to read everything in to memory and
> then seach there. correct?
This is true in principle. You can however define Indices that
leverage the database engine's
search capabilities. I've put together some code-examples, in particular
http://dev.ywesee.com/wiki.php/ODBA/ConditionIndex and
http://dev.ywesee.com/wiki.php/ODBA/FulltextIndex


> 2. how do you store the objects in the store? is it some kind of textual
> representation like xml?
That depends on the Marshaller that is being used.
The default is the ruby Marshal module, with the resulting binary
string packed to base64 to prevent database interface errors.
I've also successfully tested using YAML as the Marshaller. Basically
any Object that supports load(String) and dump(Object) should work.

Cheers
Hannes