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RE: Another attempt...

From: Seaborne, Andy <andy.seaborne@hp.com>
Date: Wed, 19 Mar 2008 09:53:58 +0000
To: Richard Newman <rnewman@twinql.com>, Andrew Newman <andrewfnewman@gmail.com>
CC: Lee Feigenbaum <lee@thefigtrees.net>, Arjohn Kampman <arjohn.kampman@aduna-software.com>, "public-rdf-dawg-comments@w3.org" <public-rdf-dawg-comments@w3.org>
Message-ID: <38CBA1F6A350B044AF785E63AAC3C677646E0CD330@G5W0276.americas.hpqcorp.net>


> -----Original Message-----
> From: Richard Newman [mailto:rnewman@twinql.com]
> Sent: 19 March 2008 00:59
> To: Andrew Newman
> Cc: Seaborne, Andy; Lee Feigenbaum; Arjohn Kampman; public-rdf-dawg-
> comments@w3.org
> Subject: Re: Another attempt...
>
> > Okay, so here's an test case that currently ends with an
> > OutOfMemoryException in SPARQLer and Twinkle:
> > SELECT ?x
> > WHERE {
> >  {} UNION
> >        {
> >           {} UNION {}
> >        }
> >      }
> >
> > I'm not sure why it's happening - but it's obviously being evaluated
> > different to my previous example (without the extra level of curly
> > braces) and it should be trivial to work out.
>
> In twinql (either AllegroGraph 2.2.5 or the unreleased 3.0) this
> produces three empty results:
>
> <?xml version="1.0"?>
> <sparql xmlns="http://www.w3.org/2005/sparql-results#">
>    <head>
>    </head>
>    <results>
>      <result>
>      </result>
>      <result>
>      </result>
>      <result>
>      </result>
>    </results>
> </sparql>
>
> Sounds like a bug in someone's software.

Old code, old bug.  I redeployed sparql.org:

I get:

-----
| x |
=====
|   |
|   |
|   |
-----

        Andy


Received on Wednesday, 19 March 2008 09:55:35 GMT

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