Thanks for the suggestion on the Ant arg issue, that worked.
With passing the tdb:unionDefaultGraph=true, without any FROM or FROM NAMED, I
get no results.
I have tried numerous variations, trying to get results.
I have two graphs, call them P and I.
I have annotated lines in the following query.
select distinct ?subjid
where {
?subj p:hasDiagnosis ?diag . #1: in graph P
?subj p:hasPatientID ?subjid . #2: in graph P
?diag rdf:type ?diagType . #3: in graph I
FILTER ( ?diagType = HOM_ICD9:HOM_ICD_1224) . #4: in graph I
}
I have tried this query 3 ways: no FROM or FROM NAMED, use FROM, use FROM NAMED.
None of them work (I get no results).
I have also tried using GRAPH in the query, but that yields no results either.
I read somewhere that a variable in different GRAPH sections of a query are not
shared.
I can query for triples in the individual graphs, that produces expected
results.
But I need to query across graphs P and I.
----Original Message-----
From: Dave Reynolds [mailto:[email protected]]
Sent: Thursday, September 22, 2011 11:29 AM
To: [email protected]
Subject: Re: query on several models in TDB
Hi,
On Thu, 2011-09-22 at 13:56 +0000, David Jordan wrote:
> I have my data in more than one model in TDB and I am trying to write a query
> that spans across them.
>
> I did try using the following FROM clause.
> FROM <urn:x-arq:UnionGraph>
> This worked, but there was a long delay in producing results (as compared to
> running against one named graph).
> So I am guessing that what took so long was that a union was literally being
> created before the query was executed.
> My hope was that this would just do the query across all the graphs in the
> database.
I believe that is what happens.
The slow down may be due to the query having a lot more data visible to it.
> Something else I am trying to get working is using the following in my Ant
> script that runs tdbquery.
> <target name="tdb.query" >
> <java classname="tdb.tdbquery" fork="true" >
> <classpath refid="tdb.classpath" />
> <arg value="--tdb=${assembler.file}" />
> <arg value="--set tdb:unionDefaultGraph=true" />
> <arg value="--query=${query}" />
> </java>
> </target>
>
> Executing 'C:\Program Files\Java\jdk1.6.0_21\jre\bin\java.exe' with arguments:
> '-classpath'
> 'C:\Documents and Settings\davjor\My
> Documents\Jena\TDB-0.8.11-SNAPSHOT\lib\arq-
> Documents\Jena\TDB-0.8.11-SNAPSHOT\lib\jena-2.6.4.jar;C:\Documents and
> Settings\ I cut this off, too long.
> b\tdb-0.8.11-SNAPSHOT.jar;C:\Documents and Settings\davjor\My
> Documents\Jena\TDB 'tdb.tdbquery'
> '--tdb=db.ttl'
> '--set tdb:unionDefaultGraph=true'
> '--query=query/haslungcancer.rq'
>
> The ' characters around the executable and arguments are not part of the
> command.
> Unknown argument: set tdb
Try with:
<arg value="--set" />
<arg value="tdb:unionDefaultGraph=true" />
Dave
