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w3c benchmark: incomplete query: functions/coalesce #5

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Rintarou opened this issue Jul 18, 2018 · 0 comments
Open

w3c benchmark: incomplete query: functions/coalesce #5

Rintarou opened this issue Jul 18, 2018 · 0 comments
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@Rintarou
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Rintarou commented Jul 18, 2018 •
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When running the query
functions/coalesce
from the w3c SPARQL 1.1 compliance benchmark

which has this exact form:

PREFIX : <http://example.org/>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
SELECT
	(COALESCE(?x, -1) AS ?cx)     # error when ?x is unbound -> -1
	(COALESCE(?o/?x, -2) AS ?div) # error when ?x is unbound or zero -> -2
	(COALESCE(?z, -3) AS ?def)    # always unbound -> -3
	(COALESCE(?z) AS ?err)        # always an error -> unbound
WHERE {
	?s :p ?o .
	OPTIONAL {
		?s :q ?x
	}
}

we obtain the following response:

<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#">
  <head>
    <variable name="cx"/>
    <variable name="div"/>
    <variable name="def"/>
    <variable name="err"/>
  </head>
  <results>
    <result>
      <binding name="cx">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">0</literal>
      </binding>
      <binding name="div">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">-2</literal>
      </binding>
      <binding name="def">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">-3</literal>
      </binding>
    </result>
    <result>
      <binding name="cx">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">2</literal>
      </binding>
      <binding name="div">
        <literal datatype="http://www.w3.org/2001/XMLSchema#decimal">0.0</literal>
      </binding>
      <binding name="def">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">-3</literal>
      </binding>
    </result>
    <result>
      <binding name="cx">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">2</literal>
      </binding>
      <binding name="div">
        <literal datatype="http://www.w3.org/2001/XMLSchema#decimal">2.0</literal>
      </binding>
      <binding name="def">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">-3</literal>
      </binding>
    </result>
  </results>
</sparql>

but this response is incomplete and misses the following result:

<result>
    <binding name="cx">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">-1</literal>
    </binding>
    <binding name="div">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">-2</literal>
    </binding>
    <binding name="def">
        <literal datatype="http://www.w3.org/2001/XMLSchema#integer">-3</literal>
    </binding>
</result>

It is yet unclear why this happens.

It is unlikely to be related to the underlying Jena codebase, as the query runs fine on the jena-hdt module.

attached is the Query, Results, and Expected files.
QRE.zip
@Rintarou Rintarou added the bug Something isn't working label Jul 18, 2018
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