[Bigdata-developers] Fwd: [bigdata - Help] Nesting exists within bind gives issues

[Bryan T. <br...@sy...>]

There have been a few tickets around exist and bind lately. Any thoughts? Bryan


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From: SourceForge.net<http://SourceForge.net> <no...@so...<mailto:no...@so...>>
Date: October 15, 2013 at 4:46:21 PM EDT
To: SourceForge.net<http://SourceForge.net> <no...@so...<mailto:no...@so...>>
Subject: [bigdata - Help] Nesting exists within bind gives issues


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By: newres

Hi,

I am currently trying to work with nesting an Exists within Bind which seems
to give trouble. A small example:


SELECT ?patient ?s
   WHERE    { ?patient rdf:type impact:Patient .
       BIND ( true AS ?s)
       }

Works fine and binds true to ?s in the result. Meanwhile while nesting, an even
trivial exists which accourding to the sparql specificatiion should return a
true or false, ?s is always unbound.


SELECT ?patient ?s
   WHERE    { ?patient rdf:type impact:Patient .
       BIND ( EXISTS{?a ?b ?c} AS ?s)
       }

What am I missing here with the nesting ?

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