Related to the answer of a previous question of mine (see [1]) I have a new
question: I currently have a CONSTRUCT query with a nested SELECT which makes
use of aggregates. What I now want to do is to construct new URIs in the
CONSTRUCT statement.
What I want to do is basically similar as can b
To answer my own question, I think this is the correct solution:
PREFIX
CONSTRUCT { ... }
WHERE {
BIND () {
SELECT ...
WHERE {
...
}
GROUP BY ...
}
}
Best,
Peter
> -Ursprüngliche Nachrich
The BIND could also be within the sub-SELECT, depends on the use case.
On Tue, Nov 24, 2015 at 11:35 AM, Wetz Peter wrote:
> To answer my own question, I think this is the correct solution:
>
> PREFIX
> CONSTRUCT { ... }
> WHERE {
> BIND () {
> SELECT ...
>
Maybe a valid answer, however in my use case that wouldnt work, because I want
to bind a variable which is then used in the CONSTRUCT, but it's a new (!)
variable and not a variable which comes from the nested SELECT.
Best
> -Ursprüngliche Nachricht-
> Von: Martynas Jusevičius [mailto:m
In your example, the only variable from WHERE which is used in
CONSTRUCT template is ?s, and you don't show how ?s is obtained. You
aggregate ?agg but you don't use it in the template.
A better example would yield a more definite answer.
On Tue, Nov 24, 2015 at 11:44 AM, Wetz Peter wrote:
> Mayb
Instead of BIND you can simply use a project expression, this is
essentially the same as you would do for a BIND but placed on the SELECT
line with variables and aggregates e.g.
PREFIXES
CONSTRUCT { ?s rdfs:label ?var . }
WHERE {
SELECT ?s (AVG(?single) as ?agg) (IRI(expr) AS ?va
Thanks Rob, this also does the job.
What are advantages of this approach compared to using BIND() ? Performance?
Thanks again and best,
Peter
> -Ursprüngliche Nachricht-
> Von: Rob Vesse [mailto:rve...@dotnetrdf.org]
> Gesendet: Dienstag, 24. November 2015 12:02
> An: users@jena.apache.or
On 24/11/15 13:14, Wetz Peter wrote:
Thanks Rob, this also does the job.
What are advantages of this approach compared to using BIND() ? Performance?
Thanks again and best,
Peter
Not much difference. They are the same operation with same rules as to
what you can and can't do. They happen at
