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Posted to ojb-user@db.apache.org by "Martin I. Levi" <ml...@labtie.mmt.upc.es> on 2004/06/21 14:36:41 UTC
ODMG documentation?
Hi,
Can anybody tell me which is/are the most complete source/s of ODMG
documentation?
What I want to know is how to make complex (real-life!) querys through
ODMG.
Thanks in advance!
--
Saludos,
Martin I. Levi
Centre Tecnològic de Transferenciència de Calor
Universitat Politècnica de Catalunya
www.cttc.upc.edu
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Re: ODMG documentation?
Posted by Thomas Dudziak <to...@first.fhg.de>.
Martin I. Levi wrote:
> ok, but is there any document telling which functions are supported ?
> And anyway do you encourage using OQL on OJB ?
> I really would appreciate your opinion on this subject.
I have had a glance at the grammar, and it seems that most if not all of
the OQL syntax is supported. Only a few functions seem to be missing
(functions are something like 'count()' and the like). Other than that
it is stable and works nicely. Also, we'll add the missing features in
the, well, not so far future (thus making OJB fully OQL 3.0 compliant).
So if you consider ODMG as your API, then you should go ahead and use
it. And if you have a query that currently does not work, you can always
create a workaround with PB-style queries until the OQL implementation
is fully OQL 3.0 compliant.
You're right, though. We should put together some documentation on the
usage and available functions of OQL, especially because OQL is also
usable from PB.
Tom
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Re: ODMG documentation?
Posted by "Martin I. Levi" <ml...@labtie.mmt.upc.es>.
ok, but is there any document telling which functions are supported ?
And anyway do you encourage using OQL on OJB ?
I really would appreciate your opinion on this subject.
On Mon, 2004-06-21 at 15:36, Thomas Dudziak wrote:
> There is a book about ODMG. Also a few tutorials are on the web like:
>
> http://www.db.ucsd.edu/People/michalis/notes/O2/OQLTutorial.htm
>
> Please note that there are some missing parts in the OQL implementation
> of OJB, most notably some functions are currently not supported.
>
> Tom
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: ojb-user-unsubscribe@db.apache.org
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--
Saludos,
Martin I. Levi
Centre Tecnològic de Transferenciència de Calor
Universitat Politècnica de Catalunya
www.cttc.upc.edu
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Re: ODMG documentation?
Posted by Steve Linabery <sl...@worldcycling.com>.
I second that. I have been using a subset of OQL selected through trial
and error.
Last time I checked the ojb website, there was no documentation on what
subset of OQL was provided by ojb...unless you count reading the source
code!
s
On Tue, 2004-06-22 at 03:34, Martin I. Levi wrote:
> ok, but is there any document telling which functions are supported ?
> And anyway do you encourage using OQL on OJB ?
> I really would appreciate your opinion on this subject.
>
> On Mon, 2004-06-21 at 15:36, Thomas Dudziak wrote:
>
> > There is a book about ODMG. Also a few tutorials are on the web like:
> >
> > http://www.db.ucsd.edu/People/michalis/notes/O2/OQLTutorial.htm
> >
> > Please note that there are some missing parts in the OQL implementation
> > of OJB, most notably some functions are currently not supported.
> >
> > Tom
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: ojb-user-unsubscribe@db.apache.org
> > For additional commands, e-mail: ojb-user-help@db.apache.org
--
Steve Linabery
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Re: ODMG documentation?
Posted by Thomas Dudziak <to...@first.fhg.de>.
Martin I. Levi wrote:
>Hi,
>
>Can anybody tell me which is/are the most complete source/s of ODMG
>documentation?
>What I want to know is how to make complex (real-life!) querys through
>ODMG.
>
>
There is a book about ODMG. Also a few tutorials are on the web like:
http://www.db.ucsd.edu/People/michalis/notes/O2/OQLTutorial.htm
Please note that there are some missing parts in the OQL implementation
of OJB, most notably some functions are currently not supported.
Tom
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Re: ODMG documentation?
Posted by "Martin I. Levi" <ml...@labtie.mmt.upc.es>.
I searched for ODMG before and i didn't find anything "complete" perhaps
OQL would do the trick.
Dank U wel!
On Mon, 2004-06-21 at 16:45, Stijn de Witt wrote:
> Search for OQL or Object Query Language. That is the query language used
> with ODMG. There is a fat manual (PDF) available somewhere, I downloaded it
> once. It is very formal, but also very thorough and complete.
>
> -Stijn
>
>
> ----- Original Message -----
> From: "Martin I. Levi" <ml...@labtie.mmt.upc.es>
> To: "OJB Users List" <oj...@db.apache.org>
> Sent: Monday, June 21, 2004 2:36 PM
> Subject: ODMG documentation?
>
>
> > Hi,
> >
> > Can anybody tell me which is/are the most complete source/s of ODMG
> > documentation?
> > What I want to know is how to make complex (real-life!) querys through
> > ODMG.
> >
> > Thanks in advance!
> >
> >
> > --
> > Saludos,
> >
> > Martin I. Levi
> >
> > Centre Tecnològic de Transferenciència de Calor
> > Universitat Politècnica de Catalunya
> > www.cttc.upc.edu
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: ojb-user-unsubscribe@db.apache.org
> > For additional commands, e-mail: ojb-user-help@db.apache.org
> >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: ojb-user-unsubscribe@db.apache.org
> For additional commands, e-mail: ojb-user-help@db.apache.org
--
Saludos,
Martin I. Levi
Centre Tecnològic de Transferenciència de Calor
Universitat Politècnica de Catalunya
www.cttc.upc.edu
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Re: ODMG documentation?
Posted by Stijn de Witt <St...@bergland-it.nl>.
Search for OQL or Object Query Language. That is the query language used
with ODMG. There is a fat manual (PDF) available somewhere, I downloaded it
once. It is very formal, but also very thorough and complete.
-Stijn
----- Original Message -----
From: "Martin I. Levi" <ml...@labtie.mmt.upc.es>
To: "OJB Users List" <oj...@db.apache.org>
Sent: Monday, June 21, 2004 2:36 PM
Subject: ODMG documentation?
> Hi,
>
> Can anybody tell me which is/are the most complete source/s of ODMG
> documentation?
> What I want to know is how to make complex (real-life!) querys through
> ODMG.
>
> Thanks in advance!
>
>
> --
> Saludos,
>
> Martin I. Levi
>
> Centre Tecnològic de Transferenciència de Calor
> Universitat Politècnica de Catalunya
> www.cttc.upc.edu
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: ojb-user-unsubscribe@db.apache.org
> For additional commands, e-mail: ojb-user-help@db.apache.org
>
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