You could implement optimistic concurrency? Where a version is stored in the document? Or using the date system you described.
Override DirectUpdateHandler2.addDoc with the custom logic. It seems like we should have a way of performing this without custom code and/or an easier way to plug logic into UpdateHandler. Basic SQL like functions should be possible or simply a Lucene query (which can with QP2.0 support SQL like syntax). On Fri, Aug 14, 2009 at 3:18 PM, Archon810<archon...@gmail.com> wrote: > > I have a fairly simple need to do a conditional update in Solr, which is > easily accomplished in MySQL. > > For example, > > * I have 100 documents with a unique field called <id> > * I am POSTing 10 documents, some of which may be duplicate <id>s, in > which case Solr would update the existing records with the same <id>s > * I have a field called <dateCreated> and I would like to only update a > <doc> if the new <dateCreated> is greated than the old <dateCreated> (this > applies to duplicate <id>s only, of course) > > How would I be able to accomplish such a thing? > > The context is trying to combat race conditions resulting in multiple adds > for the same ID but executing in the wrong order. > > Thanks. > > -- > View this message in context: > http://www.nabble.com/Solr-conditional-adds-updates--tp24979499p24979499.html > Sent from the Solr - User mailing list archive at Nabble.com. > >
