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 <[email protected]> wrote:
From: Andy Seaborne <[email protected]> Subject: Re: Fw: Re: [jena-dev] Jena SDB: Nested transactions To: [email protected] 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 <[email protected]> wrote: > > From: Andy Seaborne <[email protected]> > Subject: Re: [jena-dev] Jena SDB: Nested transactions > To: "Suneetha" <[email protected]> > 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 /<[email protected]>/* >> wrote: >> >> >> From: Andy Seaborne <[email protected]> >> Subject: Re: [jena-dev] Jena SDB: Nested > transactions >> To: [email protected] >> Cc: "itsuneetha" <[email protected]> >> 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 >> >> >
