Re: Visibility of variables in nested Group(OrUnion)GraphPatterns

On 31/08/15 13:07, Michael Schmidt wrote:
> James, all,
>
> thanks for your feedback. As I understand your response, you would agree
> with my assessment of the expected query results — because in all cases
> at least one of the variables is not bound in the respective scope, so
> all queries return the empty result.
>
> When it comes to the FILTER queries, there’s broad "agreement" amongst
> the engines I tested. However, for queries 2a. and 2b. one can observe
> that many (most) engines, amongst them Sesame and Jena, actually do
> deliver answers. The same is true for a slight variant of 2b, which
> pushes the variable bindings into a surrounding VALUES clause:

Any chance of filing a bug report?

https://issues.apache.org/jira/browse/JENA

(it looks an optimizer issue)

 Andy

Received on Monday, 31 August 2015 16:41:24 UTC