[jira] [Comment Edited] (JENA-707) Hyphens in tdb:location path cause dataset querys to return empty resultsets when using TDBFactory

["Rob Vesse (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14016608#comment-14016608 ] 

Rob Vesse edited comment on JENA-707 at 6/3/14 3:29 PM:
--------------------------------------------------------

I can't reproduce this on OS X 10.9.3 (and I have multiple hyphens in my paths)

One thing I note is that you have {{tdb:unionDefaultGraph}} set to true, depending on your queries (which you haven't shown) then empty results would actually be the expected behaviour.

For example if you have all your data in the default graph and no named graphs then a query like the following:
{noformat}
SELECT * WHERE { ?s ?p ?o }
{noformat}

Would indeed return an empty result since you are actually querying the union of all named graphs (which is empty) thus an empty result is expected behaviour.


was (Author: rvesse):
I can't reproduce this on OS X 10.9.3 (and I have multiple hyphens in my paths)

One thing I note is that you have {{tdb:unionDefaultGraph}} set to true, depending on your queries (which you haven't shown) then empty results would actually be the expected behaviour.

For example if you have all your data in the default graph and no named graphs then a query like {{SELECT * WHERE { ?s ?p ?o } }} would indeed return an empty result since you are actually querying the union of all named graphs (which is empty) thus an empty result is expected behaviour.

> Hyphens in tdb:location path cause dataset querys to return empty resultsets when using TDBFactory
> --------------------------------------------------------------------------------------------------
>
>                 Key: JENA-707
>                 URL: https://issues.apache.org/jira/browse/JENA-707
>             Project: Apache Jena
>          Issue Type: Bug
>    Affects Versions: Jena 2.11.1
>         Environment: OSX 10.9.3 (Mavericks)
>            Reporter: Rick Moynihan
>            Priority: Minor
>
> When using the Jena API and TDBFactory.assembleDataset("config.ttl") if the storage location path contains a hyphen it prevents querying at least via QueryExecutionFactory.
> e.g. the following Assembler config fails, causing all queries to return empty resultsets:
> {noformat}
> @prefix tdb:     <http://jena.hpl.hp.com/2008/tdb#> .
> @prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
> @prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
> @prefix ja:      <http://jena.hpl.hp.com/2005/11/Assembler#> .
> [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
> tdb:DatasetTDB  rdfs:subClassOf  ja:RDFDataset .
> tdb:GraphTDB    rdfs:subClassOf  ja:Model .
> <#live> rdf:type      tdb:DatasetTDB ;
>       tdb:location "quad-store/live" ;  # change to suit your local installation
>       ja:context [ ja:cxtName "arq:queryTimeout" ;  ja:cxtValue "10000,10000" ] ;
>       tdb:unionDefaultGraph true ;
>       .
> {noformat}
> But changing tdb:location to "quadstore/live" works.



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