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Posted to notifications@rya.apache.org by "Alan Hinchliff (JIRA)" <ji...@apache.org> on 2017/10/11 19:00:00 UTC
[jira] [Created] (RYA-403) Rya property path query not returning
full results
Alan Hinchliff created RYA-403:
----------------------------------
Summary: Rya property path query not returning full results
Key: RYA-403
URL: https://issues.apache.org/jira/browse/RYA-403
Project: Rya
Issue Type: Bug
Affects Versions: 3.2.11
Environment: Hadoop 2.7.4; Accumulo 1.8.1; Rya 3.2.11
Reporter: Alan Hinchliff
Attachments: 20170201.as-rel2.txt.100node.xml, rya-testing.log
We are trying to evaluate using Rya for an application, primarily involving property path queries. It seems that the results returned by Rya are incomplete; while results from a competing database returns complete results.
This query uses a property path feature of SPARQL 1.1 (and a subquery feature) to identify a path between two nodes in the dataset (Node-395796 and Node-101) by defining a regular expression between source node and some node X and X and the destination node. The subquery searches for all paths between X and destination and the first part looks for all paths between source and X.
{code:sql}
prefix nml: <http://schemas.ogf.org/nml/base/2013/02#>
prefix bgp: <http://schemas.ogf.org/nml/bgp/2017/03#>
prefix : <http://code.renci.org/projects/serpent#>
prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT DISTINCT ?inPort ?x ?outPort
WHERE {
:Node-395796 ( nml:hasOutboundPort / ( bgp:isCPSource | bgp:isPPSource ) / ( bgp:hasCPSink | bgp:hasPPSink ) / bgp:isInboundPort )* / nml:hasOutboundPort / ( bgp:isCPSource | bgp:isPPSource ) / ( bgp:hasCPSink | bgp:hasPPSink ) ?inPort .
?inPort bgp:isInboundPort ?x .
?x rdf:type nml:Node .
{
SELECT DISTINCT ?x ?outPort
WHERE {
?x nml:hasOutboundPort ?outPort .
?outPort ( bgp:isCPSource | bgp:isPPSource ) / ( bgp:hasCPSink | bgp:hasPPSink ) / bgp:isInboundPort / ( nml:hasOutboundPort / ( bgp:isCPSource | bgp:isPPSource ) / ( bgp:hasCPSink | bgp:hasPPSink ) / bgp:isInboundPort )* :Node-101 .
} } }
{code}
Results from Rya:
{code:xml}
<sparql xmlns="http://www.w3.org/2005/sparql-results#">
<head>
<variable name="inPort"/>
<variable name="x"/>
<variable name="outPort"/>
</head>
<results>
<result>
<binding name="x">
<uri>http://code.renci.org/projects/serpent#Node-395378</uri>
</binding>
<binding name="outPort">
<uri>
http://code.renci.org/projects/serpent#Port-Node-395378-Node-25899
</uri>
</binding>
<binding name="inPort">
<uri>
http://code.renci.org/projects/serpent#Port-Node-395378-Node-395796
</uri>
</binding>
</result>
</results>
</sparql>
{code}
Results from different database, formatted as
{noformat} inPort --- x --- outPort {noformat}
{code:none}
http://code.renci.org/projects/serpent#Port-Node-395378-Node-395796 --- http://code.renci.org/projects/serpent#Node-395378 --- http://code.renci.org/projects/serpent#Port-Node-395378-Node-25899
http://code.renci.org/projects/serpent#Port-Node-25899-Node-395378 --- http://code.renci.org/projects/serpent#Node-25899 --- http://code.renci.org/projects/serpent#Port-Node-25899-Node-101
{code}
A sample dataset ({{20170201.as-rel2.txt.100node.xml}}) and logs ({{rya-testing.log}}) from running the query are attached.
Are we using SPARQL queries unsupported by Rya?
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