I'm not familiar with HBase and it's query capability, so I am going to assume that it has a query language that works something like SQL and go with the standard answer: extend GraphBase (com.hp.hpl.jena.graph.impl.GraphBase) as a starting point.
It is not the algebra but it will present the HBase data as a graph and it will plug into the query engine and a number of other components. Claude On Thu, Apr 3, 2014 at 6:12 PM, Shijie Jin -X (shijjin - AAP3 INC at Cisco) <[email protected]> wrote: > Hi All: > > I’m trying to extend the ARQ execution so it can convert SPARQL query to > Hbase “scan" operation. But after reading the document( > http://jena.sourceforge.net/ARQ/arq-query-eval.html) and > example(src-examples/arq.examples.engine.MyQueryEngine), I still can’t > figure out where should I write my code to turn the SPARQL query (or SPARQL > algebra) into Hbase query. > > And I’v also read the source code of D2RQ, but it uses the old version > Jena framework which has a lot of difference compare to the latest version. > > So anyone can give me some hints how to extend the ARQ execution > correctly? Is there any good document or source code that I should look > into? > > Thank you, > Shijie > -- I like: Like Like - The likeliest place on the web<http://like-like.xenei.com> LinkedIn: http://www.linkedin.com/in/claudewarren
