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Posted to users@jena.apache.org by Suneetha <it...@yahoo.co.in> on 2012/09/25 13:46:44 UTC
Fw: Re: [jena-dev] Jena SDB: Nested transactions
Hello,
This is related to the post: Jena SDB: Nested Transactions.
The database we are using is IBM DB2
database. Can we realize a nested transaction monitor with this
database? How difficult or easy is it?
What does the "Type" column in the "NODES" table in the SDB store
indicate? We are not able to decode the number value in that column.
To give you a brief about us. We are working on a project in our
organisation, where we have to use RDF. We are evaluating on using
Apache Jena for the same. It has been a few days since we have been
looking into RDF and Jena. It seems to be very interesting for us and
we are learning more every day. We will have more questions for you
since both RDF and Jena are new to us. Please help.
Thanks & Regards,
Suneetha
--- On Tue, 25/9/12, Andy Seaborne <an...@epimorphics.com> wrote:
From: Andy Seaborne <an...@epimorphics.com>
Subject: Re: [jena-dev] Jena SDB: Nested transactions
To: "Suneetha" <it...@yahoo.co.in>
Date: Tuesday, 25 September, 2012, 1:15 PM
> ************************
> > The Jena user list has moved to Apache.
> >
> > The new list name is 'users AT jena.apache.org'.
> >
> > Send email to
>
> 'users-subscribe AT jena.apache.org' to subscribe.
> ************************
Please use the mailing list as noted in my reply. All questions should
go to the Jena users mailing list where many people may be able to help you.
Andy
On 25/09/12 06:46, Suneetha wrote:
> Hello Mr. Andy,
> Thank you very much for your quick response. We more help from you and
> Jena-dev forum group. The database we are using is IBM DB2 database.
> Can we realize a nested transaction monitor with this database? How
> difficult or easy is it?
> What does the "Type" column in the "NODES" table in the SDB store
> indicate? We are not able to decode the number value in that column.
> To give you a brief about us. We are working on a project in our
> organisation, where we have to use RDF. We are
evaluating on using
> Apache Jena for the same. It has been a few days since we have been
> looking into RDF and Jena. It seems to be very interesting for us and
> we are learning more every day. We also need a lot of help from your end
> and the jena-dev forum group. We will have more questions for you since
> both RDF and Jena are new to us. Please help.
> Thanks & Regards,
> Suneetha
>
> --- On *Fri, 21/9/12, Andy Seaborne /<an...@epimorphics.com>/*
> wrote:
>
>
> From: Andy Seaborne <an...@epimorphics.com>
> Subject: Re: [jena-dev] Jena SDB: Nested
transactions
> To: jena-dev@yahoogroups.com
> Cc: "itsuneetha" <it...@yahoo.co.in>
> Date: Friday, 21 September, 2012, 4:27 PM
>
> ************************
> > The Jena user list has moved to Apache.
> >
> > The new list name is 'users AT jena.apache.org'.
> >
> > Send email to
> > 'users-subscribe AT jena.apache.org' to subscribe.
> ************************
>
> > Does Jena SDB support
nested transactions?
>
> No.
>
> (although you may be able to get it to happen, depending on your SQL
> database)
>
> Andy
>
>
Re: Fw: Re: [jena-dev] Jena SDB: Nested transactions
Posted by Suneetha <it...@yahoo.co.in>.
Hello Mr. Andy,
Thank you for your valuable suggestion...
Suneetha
--- On Wed, 26/9/12, Andy Seaborne <an...@apache.org> wrote:
From: Andy Seaborne <an...@apache.org>
Subject: Re: Fw: Re: [jena-dev] Jena SDB: Nested transactions
To: users@jena.apache.org
Date: Wednesday, 26 September, 2012, 7:57 PM
On 26/09/12 10:42, Suneetha wrote:
> Nested Transactions: This required in order to roll back
> transactions, in case of any problem in between.. say for example
> operation 'save', where lot of sub records transactions have to be
> saved before saving the main record transaction..
Observation: Nested transactions aren't necessary for that - wait until
the top level transaction commits.
> SDB: SDB as we are using IBM DB2 database as a storage and SDB
> supports this database, but not TDB..
>
> One more thing just out of curiosity: What is the abbreviation of SDB
> and TDB?:-)
S = SQL ... or SPARQL.
T = Tuple.
Andy
>
> --- On Wed, 26/9/12, Andy Seaborne <an...@apache.org> wrote:
>
>
> From: Andy Seaborne <an...@apache.org> Subject: Re: Fw: Re: [jena-dev]
> Jena SDB: Nested transactions To: users@jena.apache.org Date:
> Wednesday, 26 September, 2012, 1:06 PM
>
>
> On 25/09/12 12:46, Suneetha wrote:
>> Hello,
>>
>> This is related to the post: Jena SDB: Nested Transactions.
>>
>> The database we are using is IBM DB2 database. Can we realize a
>> nested transaction monitor with this database? How difficult or
>> easy is it?
>
> Why do you want to do this?
>
>> What does the "Type" column in the "NODES" table in the SDB store
>> indicate? We are not able to decode the number value in that
>> column.
>
> For all practical purposes it is unused. It was to record the fact
> it might be a known type (e.g. xsd:integer) but all info is in the
> datatype.
>
> Note that SDB uses a fixed schema for storing RDF and app does not
> access the database directly but through the Jena API.
>
> TDB is faster and scales better.
>
> Andy
Re: Fw: Re: [jena-dev] Jena SDB: Nested transactions
Posted by Andy Seaborne <an...@apache.org>.
On 26/09/12 10:42, Suneetha wrote:
> Nested Transactions: This required in order to roll back
> transactions, in case of any problem in between.. say for example
> operation 'save', where lot of sub records transactions have to be
> saved before saving the main record transaction..
Observation: Nested transactions aren't necessary for that - wait until
the top level transaction commits.
> SDB: SDB as we are using IBM DB2 database as a storage and SDB
> supports this database, but not TDB..
>
> One more thing just out of curiosity: What is the abbreviation of SDB
> and TDB?:-)
S = SQL ... or SPARQL.
T = Tuple.
Andy
>
> --- On Wed, 26/9/12, Andy Seaborne <an...@apache.org> wrote:
>
>
> From: Andy Seaborne <an...@apache.org> Subject: Re: Fw: Re: [jena-dev]
> Jena SDB: Nested transactions To: users@jena.apache.org Date:
> Wednesday, 26 September, 2012, 1:06 PM
>
>
> On 25/09/12 12:46, Suneetha wrote:
>> Hello,
>>
>> This is related to the post: Jena SDB: Nested Transactions.
>>
>> The database we are using is IBM DB2 database. Can we realize a
>> nested transaction monitor with this database? How difficult or
>> easy is it?
>
> Why do you want to do this?
>
>> What does the "Type" column in the "NODES" table in the SDB store
>> indicate? We are not able to decode the number value in that
>> column.
>
> For all practical purposes it is unused. It was to record the fact
> it might be a known type (e.g. xsd:integer) but all info is in the
> datatype.
>
> Note that SDB uses a fixed schema for storing RDF and app does not
> access the database directly but through the Jena API.
>
> TDB is faster and scales better.
>
> Andy
Re: Fw: Re: [jena-dev] Jena SDB: Nested transactions
Posted by Suneetha <it...@yahoo.co.in>.
Nested Transactions: This required in order to roll back transactions, in case of any problem in between.. say for example operation 'save', where lot of sub records transactions have to be saved before saving the main record transaction..
SDB: SDB as we are using IBM DB2 database as a storage and SDB supports this database, but not TDB..
One more thing just out of curiosity: What is the abbreviation of SDB and TDB?:-)
--- On Wed, 26/9/12, Andy Seaborne <an...@apache.org> wrote:
From: Andy Seaborne <an...@apache.org>
Subject: Re: Fw: Re: [jena-dev] Jena SDB: Nested transactions
To: users@jena.apache.org
Date: Wednesday, 26 September, 2012, 1:06 PM
On 25/09/12 12:46, Suneetha wrote:
> Hello,
>
> This is related to the post: Jena SDB: Nested Transactions.
>
> The database we are using is IBM DB2
> database. Can we realize a nested transaction monitor with this
> database? How difficult or easy is it?
Why do you want to do this?
> What does the "Type" column in the "NODES" table in the SDB store
> indicate? We are not able to decode the number value in that column.
For all practical purposes it is unused. It was to record the fact it
might be a known type (e.g. xsd:integer) but all info is in the datatype.
Note that SDB uses a fixed schema for storing RDF and app does not
access the database directly but through the Jena API.
TDB is faster and scales better.
Andy
> To give you a brief about us. We are working on a project in our
> organisation, where we have to use RDF. We are evaluating on using
> Apache Jena for the same. It has been a few days since we have been
> looking into RDF and Jena. It seems to be very interesting for us and
> we are learning more every day. We will have more questions for you
> since both RDF and Jena are new to us. Please help.
>
> Thanks & Regards,
> Suneetha
>
> --- On Tue, 25/9/12, Andy Seaborne <an...@epimorphics.com> wrote:
>
> From: Andy Seaborne <an...@epimorphics.com>
> Subject: Re: [jena-dev] Jena SDB: Nested transactions
> To: "Suneetha" <it...@yahoo.co.in>
> Date: Tuesday, 25 September, 2012, 1:15 PM
>
> > ************************
> > > The Jena user list has moved to Apache.
> > >
> > > The new list name is 'users AT jena.apache.org'.
> > >
> > > Send email to
> >
> > 'users-subscribe AT jena.apache.org' to subscribe.
> > ************************
>
> Please use the mailing list as noted in my reply. All questions should
> go to the Jena users mailing list where many people may be able to help you.
>
> Andy
>
>
> On 25/09/12 06:46, Suneetha wrote:
>> Hello Mr. Andy,
>> Thank you very much for your quick response. We more help from you and
>> Jena-dev forum group. The database we are using is IBM DB2 database.
>> Can we realize a nested transaction monitor with this database? How
>> difficult or easy is it?
>> What does the "Type" column in the "NODES" table in the SDB store
>> indicate? We are not able to decode the number value in that column.
>> To give you a brief about us. We are working on a project in our
>> organisation, where we have to use RDF. We are
> evaluating on using
>> Apache Jena for the same. It has been a few days since we have been
>> looking into RDF and Jena. It seems to be very interesting for us and
>> we are learning more every day. We also need a lot of help from your end
>> and the jena-dev forum group. We will have more questions for you since
>> both RDF and Jena are new to us. Please help.
>> Thanks & Regards,
>> Suneetha
>>
>> --- On *Fri, 21/9/12, Andy Seaborne /<an...@epimorphics.com>/*
>> wrote:
>>
>>
>> From: Andy Seaborne <an...@epimorphics.com>
>> Subject: Re: [jena-dev] Jena SDB: Nested
> transactions
>> To: jena-dev@yahoogroups.com
>> Cc: "itsuneetha" <it...@yahoo.co.in>
>> Date: Friday, 21 September, 2012, 4:27 PM
>>
>> ************************
>> > The Jena user list has moved to Apache.
>> >
>> > The new list name is 'users AT jena.apache.org'.
>> >
>> > Send email to
>> > 'users-subscribe AT jena.apache.org' to subscribe.
>> ************************
>>
>> > Does Jena SDB support
> nested transactions?
>>
>> No.
>>
>> (although you may be able to get it to happen, depending on your SQL
>> database)
>>
>> Andy
>>
>>
>
Re: Fw: Re: [jena-dev] Jena SDB: Nested transactions
Posted by Andy Seaborne <an...@apache.org>.
On 25/09/12 12:46, Suneetha wrote:
> Hello,
>
> This is related to the post: Jena SDB: Nested Transactions.
>
> The database we are using is IBM DB2
> database. Can we realize a nested transaction monitor with this
> database? How difficult or easy is it?
Why do you want to do this?
> What does the "Type" column in the "NODES" table in the SDB store
> indicate? We are not able to decode the number value in that column.
For all practical purposes it is unused. It was to record the fact it
might be a known type (e.g. xsd:integer) but all info is in the datatype.
Note that SDB uses a fixed schema for storing RDF and app does not
access the database directly but through the Jena API.
TDB is faster and scales better.
Andy
> To give you a brief about us. We are working on a project in our
> organisation, where we have to use RDF. We are evaluating on using
> Apache Jena for the same. It has been a few days since we have been
> looking into RDF and Jena. It seems to be very interesting for us and
> we are learning more every day. We will have more questions for you
> since both RDF and Jena are new to us. Please help.
>
> Thanks & Regards,
> Suneetha
>
> --- On Tue, 25/9/12, Andy Seaborne <an...@epimorphics.com> wrote:
>
> From: Andy Seaborne <an...@epimorphics.com>
> Subject: Re: [jena-dev] Jena SDB: Nested transactions
> To: "Suneetha" <it...@yahoo.co.in>
> Date: Tuesday, 25 September, 2012, 1:15 PM
>
> > ************************
> > > The Jena user list has moved to Apache.
> > >
> > > The new list name is 'users AT jena.apache.org'.
> > >
> > > Send email to
> >
> > 'users-subscribe AT jena.apache.org' to subscribe.
> > ************************
>
> Please use the mailing list as noted in my reply. All questions should
> go to the Jena users mailing list where many people may be able to help you.
>
> Andy
>
>
> On 25/09/12 06:46, Suneetha wrote:
>> Hello Mr. Andy,
>> Thank you very much for your quick response. We more help from you and
>> Jena-dev forum group. The database we are using is IBM DB2 database.
>> Can we realize a nested transaction monitor with this database? How
>> difficult or easy is it?
>> What does the "Type" column in the "NODES" table in the SDB store
>> indicate? We are not able to decode the number value in that column.
>> To give you a brief about us. We are working on a project in our
>> organisation, where we have to use RDF. We are
> evaluating on using
>> Apache Jena for the same. It has been a few days since we have been
>> looking into RDF and Jena. It seems to be very interesting for us and
>> we are learning more every day. We also need a lot of help from your end
>> and the jena-dev forum group. We will have more questions for you since
>> both RDF and Jena are new to us. Please help.
>> Thanks & Regards,
>> Suneetha
>>
>> --- On *Fri, 21/9/12, Andy Seaborne /<an...@epimorphics.com>/*
>> wrote:
>>
>>
>> From: Andy Seaborne <an...@epimorphics.com>
>> Subject: Re: [jena-dev] Jena SDB: Nested
> transactions
>> To: jena-dev@yahoogroups.com
>> Cc: "itsuneetha" <it...@yahoo.co.in>
>> Date: Friday, 21 September, 2012, 4:27 PM
>>
>> ************************
>> > The Jena user list has moved to Apache.
>> >
>> > The new list name is 'users AT jena.apache.org'.
>> >
>> > Send email to
>> > 'users-subscribe AT jena.apache.org' to subscribe.
>> ************************
>>
>> > Does Jena SDB support
> nested transactions?
>>
>> No.
>>
>> (although you may be able to get it to happen, depending on your SQL
>> database)
>>
>> Andy
>>
>>
>