Hi David,
Yes this would work for me in this case -- I do know the variables so
I could use UNDEF as placeholders.
Maybe you have a code snippet for this logic? :)
Martynas
On Mon, Nov 25, 2024 at 1:03 AM David Habgood <dcchabg...@gmail.com> wrote:
>
> Hi Martynas,
>
> Do you know ahead of time which variable(s) you're going to be injecting
> the VALUES clause for?
>
> I've been using a pattern where I add VALUES ?this { UNDEF } in "template"
> queries, then at runtime parse the query and replace "UNDEF" (where all of
> the DataBlockValue <https://www.w3.org/TR/sparql11-query/#rDataBlockValue>s
> in a binding within a InlineDataFull are "UNDEF") with a set of bindings
> supplied at runtime. This has the benefit that if you do not supply a
> binding for ?this, UNDEF means it is left unbound.
>
> Thanks,
>
> On Mon, Nov 25, 2024 at 9:40 AM Martynas Jusevičius <marty...@atomgraph.com>
> wrote:
>
> > Hi,
> >
> > What would be the simplest way to safely (i.e. using query builder or
> > algebra) to inject a VALUES block at the beginning of a query?
> >
> > For example
> >
> > SELECT *
> > {
> > ?this ?p ?o
> > }
> >
> > should become
> >
> > SELECT *
> > {
> > VALUES ?this <http://localhost>
> > ?this ?p ?o
> > }
> >
> > after the injection.
> >
> > Thanks,
> >
> > Martynas
> >
