Hi Luciano I was looking at the "old" proposed list of key feautures to be included in the new DAS M3 release, and I have a question about this one:
Optimisc concurrency control - Support for OCC recovery (TUSCANY-916) - Default OCC policy (all OCC-capable fileds used in overquaified "where") By "all OCC-capable fields", you mean all fields that were in the SELECT clause that originated the SDO data graph? The reason I ask this is that I am working in a project developing our own DAS, and we've had inumerous discussions about what needs to be in the WHERE clause of an Update stmt in order to avoid conflicts. For example (I hope the example is not too lame :-) : Assume a Transaction1 has a Data Graph with SDO objects with employees data, such as name, salary and a bonus. T1 changes the SDO by giving a bonus to all employees whose salary are less than X. However, a faster Transaction 2 changes the salaries before T1 could call dataGraph.applyChanges(). Thus making the assumption for the bonus given by T1 no longer valid. So, we think that in order to truly avoid conflicts, all selected fields should be in the WHERE clause of an Update. Any thoughts? Thanks a lot, Marilene
> > Hey Ron > We have talked about it in the past in some threads, and i think we need > to bring the subject back now that we have more content available for a DAS > release. I think we could start by looking into our wiki [1] and > review/update the list of things we want for DAS M3, and also use [2] to > document our release process. > I'll kick-off the process on the dev-list sometime by end of the week, > and ask for volunteers for Release Manager. > [1] - http://cwiki.apache.org/confluence/display/TUSCANY/RDB+DAS+-+Releases > [2] - http://cwiki.apache.org/confluence/display/TUSCANY/Release+Process > On 4/10/07, Ron Gavlin <[EMAIL PROTECTED]> wrote: > > Java DAS folks, > > Are there plans for a Tuscany DAS M3 release to coincide with the upcoming > SDO M3 release? If so, how long after the SDO release do you anticipate the > DAS release will appear? I suspect the DAS M2 release will be incompatible > with the SDO M3 release, correct? > > Thanks in advance for your assistance. > > - Ron > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Luciano Resende http://people.apache.org/~lresende <http://people.apache.org/%7Elresende>
