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Posted to dev@jena.apache.org by Claude Warren <cl...@xenei.com> on 2021/04/15 09:25:42 UTC
SPARQL question
Is there a difference between
CONSTRUCT
{
?s ?p ?o .
}
WHERE
{ { WHERE
{ ?s ?p ?o}
}
?s2 ?p2 ?o2
}
and
CONSTRUCT
{
?s ?p ?o .
}
WHERE
{ { SELECT *
WHERE
{ ?s ?p ?o}
}
?s2 ?p2 ?o2
}
--
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Re: SPARQL question
Posted by Andy Seaborne <an...@apache.org>.
On 15/04/2021 10:38, Martynas Jusevičius wrote:
> I guess the first one was meant to be
>
> CONSTRUCT
> {
> ?s ?p ?o .
> }
> WHERE
> { { { ?s ?p ?o } }
> ?s2 ?p2 ?o2
> }
When building by code there may sometimes be modifiers on the sub-query
and sometimes not. It might be easier to always put in the sub-query -
the algebra doesn't contain anything for plain SELECT * {}.
Andy
https://lists.apache.org/thread.html/r055920a11abc812c804945f660bed9fa091cb62c17d246f42e4810b7%40%3Cusers.jena.apache.org%3E
>
> On Thu, Apr 15, 2021 at 11:31 AM Rob Vesse <rv...@dotnetrdf.org> wrote:
>>
>> Well the first is invalid syntax...?
>>
>> Rob
>>
>> On 15/04/2021, 10:26, "Claude Warren" <cl...@xenei.com> wrote:
>>
>> Is there a difference between
>>
>> CONSTRUCT
>> {
>> ?s ?p ?o .
>> }
>> WHERE
>> { { WHERE
>> { ?s ?p ?o}
>> }
>> ?s2 ?p2 ?o2
>> }
>>
>> and
>> CONSTRUCT
>> {
>> ?s ?p ?o .
>> }
>> WHERE
>> { { SELECT *
>> WHERE
>> { ?s ?p ?o}
>> }
>> ?s2 ?p2 ?o2
>> }
>>
>> --
>> I like: Like Like - The likeliest place on the web
>> <http://like-like.xenei.com>
>> LinkedIn: http://www.linkedin.com/in/claudewarren
>>
>>
>>
>>
Re: SPARQL question
Posted by Martynas Jusevičius <ma...@atomgraph.com>.
I guess the first one was meant to be
CONSTRUCT
{
?s ?p ?o .
}
WHERE
{ { { ?s ?p ?o } }
?s2 ?p2 ?o2
}
On Thu, Apr 15, 2021 at 11:31 AM Rob Vesse <rv...@dotnetrdf.org> wrote:
>
> Well the first is invalid syntax...?
>
> Rob
>
> On 15/04/2021, 10:26, "Claude Warren" <cl...@xenei.com> wrote:
>
> Is there a difference between
>
> CONSTRUCT
> {
> ?s ?p ?o .
> }
> WHERE
> { { WHERE
> { ?s ?p ?o}
> }
> ?s2 ?p2 ?o2
> }
>
> and
> CONSTRUCT
> {
> ?s ?p ?o .
> }
> WHERE
> { { SELECT *
> WHERE
> { ?s ?p ?o}
> }
> ?s2 ?p2 ?o2
> }
>
> --
> I like: Like Like - The likeliest place on the web
> <http://like-like.xenei.com>
> LinkedIn: http://www.linkedin.com/in/claudewarren
>
>
>
>
Re: SPARQL question
Posted by Rob Vesse <rv...@dotnetrdf.org>.
Well the first is invalid syntax...?
Rob
On 15/04/2021, 10:26, "Claude Warren" <cl...@xenei.com> wrote:
Is there a difference between
CONSTRUCT
{
?s ?p ?o .
}
WHERE
{ { WHERE
{ ?s ?p ?o}
}
?s2 ?p2 ?o2
}
and
CONSTRUCT
{
?s ?p ?o .
}
WHERE
{ { SELECT *
WHERE
{ ?s ?p ?o}
}
?s2 ?p2 ?o2
}
--
I like: Like Like - The likeliest place on the web
<http://like-like.xenei.com>
LinkedIn: http://www.linkedin.com/in/claudewarren