Should now be fixed, build from latest Trunk or wait 24 hrs or so for the snapshot to get build and deployed by the Apache build server
Diogo: What version of ARQ are you using to do the OpAsQuery? I assume 2.10.1-SNAPSHOT since turning this type of query from its algebra back into a query only very recently became possible. Previously the BIND would have been lost completely when converting back from an algebra to a query. Also is there a reason you are using ARQ 2.8.8 in your system? That's very out of date (about 2 years so) now. Andy - The report states that the query is passed off to a system running 2.8.8, even with this fix did ARQ support BIND syntax that far back? I.e. will this fix just move the error elsewhere? Rob On 4/1/13 12:42 PM, "Andy Seaborne" <[email protected]> wrote: >Hi there, > >Thanks for the report. I've captured this as: > >https://issues.apache.org/jira/browse/JENA-429 > > Andy > >On 31/03/13 21:11, Diogo FC Patrao wrote: >> Hello >> >> I was performing a simple test with OpAsQuery: >> >> Here is the original query: >> >> PREFIX : <http://www.cipe.accamargo.org.br/ontologias/h2tc.owl#> >> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> >> PREFIX mylib: <java:dateadd.lib.pkgfor.arq.> >> >> SELECT ?yearmonth ( count(?document) as ?total ) >> WHERE >> { >> ?document a :Document; >> :documentDateOfCreation ?date ; >> :documentType "exam results" . >> BIND( mylib:DateFormat( xsd:string(?date), "yyyy-MM" ) as >> ?yearmonth ) >> } group by ?yearmonth >> >> Then I ran the code below, that compile the algebra then render the >>query >> again. >> >> Query query = QueryFactory.create( that_query_above, >> Syntax.syntaxSPARQL_11); >> >> Op op = Algebra.compile(query); >> >> System.out.println(OpAsQuery.asQuery(op)); >> >> The result is below: >> >> SELECT (<java:dateadd.lib.pkgfor.arq.DateFormat>(< >> http://www.w3.org/2001/XMLSchema#string>(?date), "yyyy-MM") AS >>?yearmonth) >> (count(?document) AS ?total) >> >> WHERE >> >> { ?document <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> < >> http://www.cipe.accamargo.org.br/ontologias/h2tc.owl#Document> . >> >> ?document < >> >>http://www.cipe.accamargo.org.br/ontologias/h2tc.owl#documentDateOfCreati >>on> >> ?date . >> >> ?document < >> http://www.cipe.accamargo.org.br/ontologias/h2tc.owl#documentType> "exam >> results" >> >> } >> >> GROUP BY ?yearmonth >> >> However, this is not a valid query; notice that the BIND has gone, it >> somehow turned to a alias on query's head. >> >> ARQ 2.8.8. upon receiving this query, yields the error: >> >> Variable used when already in-scope: ?yearmonth in >> (<java:dateadd.lib.pkgfor.arq.DateFormat>(xsd:string(?date), "yyyy-MM") >>AS >> ?yearmonth) >> >> Is that a bug on ARQ or OpAsQuery? Or anything else? >> >> Thanks! >> >> -- >> diogo patrão >> >
