Yes i've found that page, but i believed that SelectExec() was in the source code....however i'm trying to implement a SPARQL Select query using some algorithm search for graph matching on Hadoop, this should be my thesis...and i'm trying to understand if jena could help me in some way because it's very useful...have you some suggestion?i've also red something about Elphas project but i wish to understand more... thank you for your help!
2015-01-18 19:53 GMT+01:00 Andy Seaborne <[email protected]>: > On 18/01/15 17:15, Carmen Manzulli wrote: > >> Hi, >> I would to know if is it possible to override the metod ecexSelect() or if >> is there another solution to write a custom query execution? >> I would to understand the step by step the process for a query execution.. >> Thank you all for the answer :) >> >> Carmen. >> >> > QueryExecution is an interface you can have just the lightest of ARQ as a > framework. That will require quite a lot of machinery. > > Have you found > > http://jena.apache.org/documentation/query/arq-query-eval.html > > ? > > You can plug into the execution at several points: the more control you > take over, the more work it is. > > (all the engines do in fact "extend" ARQ - there is a general purpose > fallback engine to build on top of the graph interface.) > > What are you trying to do differently? > > Andy >
