Hi Holger,
I am sure it's not executed as the triples that use the values calculated
by the JavaScript function are not constructed. Also, the precondition is
not fulfilled. Here's my query:
CONSTRUCT{
?this body:reason_float_X ?reasonX .
?this body:reason_float_Y ?reasonY .
?this body:reason_float_Z ?reasonZ .
}
WHERE {
OPTIONAL{
?this body:reason_float_X ?currentReasonX .
}
FILTER(!bound(?currentReasonX)) .
?this body:float_X ?reasonX .
?this body:float_Y ?reasonY .
?this body:float_Z ?reasonZ .
}
- So, body:float_X,Y,Z are magic properties that call a SPINx function
which calculates a value and return it back.
- When this query runs for the first time, it will call the SPINx
function 3 times and construct the 3 triples.
- If the body:reason_float_X was already there, it doesn't create
anything. But yet, it takes also a long time. If I remove the 3 triples
containing the magic properties from the WHERE clause, it doesn't take
longer time. The problem also persists if I call the SPINx function
directly in the WHERE clause and BIND the values instead of querying the
Magic property.
Any hints about that?
Thanks a lot.
On Sunday, April 17, 2016 at 5:30:26 PM UTC-7, Holger Knublauch wrote:
>
> Hi Ahmed,
>
> how certain are you that the BIND doesn't get executed? Maybe the
> execution order is different from what you expect - often it's a matter of
> placing the right { ... } braces around certain blocks to control the
> execution order.
>
> Would you want to share details of the SPARQL query?
>
> Holger
>
>
> On 18/04/2016 10:12, Ahmed Shafei wrote:
>
> Hi all,
> I have a CONSTRUCT query that has a call to a SPINx function. I noticed
> that even if the query didn't reach the part where the SPINx function has
> to be called (i.e. BIND(ex:CalculateWithJS(?someNumber) AS
> ?calculatedNumber)), the query takes longer time. If I remove that BIND,
> the query takes a normal query time. I don't really understand what happens
> when a query calls a SPIN function that has a JavaScript code attached, why
> does it take longer time even if the code was not executed?
>
> Thanks in advance.
> Regards,
> Ahmed
>
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