How to use subquery in jena for pagination?

Question

I want to use jena for pagination. I use this query :

select distinct (?outEdge) (?inEdge) (?dest) (?source) { select distinct (?p as ?outEdge) (?q as ?inEdge) (?px as ?dest) (?qx as ?source)  {  { <http://dbpedia.org/resource/Japan> ?p ?px . } union { ?qx ?q <http://dbpedia.org/resource/Japan> . }  } order by ?p } offset 0 limit 10000

However this query works on online dbpedia endpoint (Viruoso) but in jena this error occurs :

com.hp.hpl.jena.query.QueryParseException: Encountered " ")" ") "" at line 1, column 585.

Answer 1

SELECT (?x) ... isn't legal SPARQL 1.1. Try without the ()

The form is (expression AS variable)

Jena accepts it as an extension using SyntaxARQ .

The syntax error would be at line 1 col 26. "column 585" makes no sense. See http://www.sparql.org/query-validator.html