[
https://issues.apache.org/jira/browse/JENA-174?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andy Seaborne updated JENA-174:
-------------------------------
Description:
{noformat}
SELECT ?p ?o WHERE
{
{ BIND(<http://dbpedia.org/sparql> AS ?service)}
UNION
{ BIND(<http://live.dbpedia.org/sparql> AS ?service)}
SERVICE ?service
{<http://dbpedia.org/resource/Paris> ?p ?o. }
}
{noformat}
==>
{noformat}
(project (?p ?o)
(join
(union
(extend ((?service <http://dbpedia.org/sparql>))
(table unit))
(extend ((?service <http://live.dbpedia.org/sparql>))
(table unit)))
(service ?service
(bgp (triple <http://dbpedia.org/resource/Paris> ?p ?o)))))
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(project (?p ?o)
(sequence
(union
(extend ((?service <http://dbpedia.org/sparql>))
(table unit))
(extend ((?service <http://live.dbpedia.org/sparql>))
(table unit)))
(service ?service
(bgp (triple <http://dbpedia.org/resource/Paris> ?p ?o)))))
{noformat}
was:
SELECT ?p ?o WHERE
{
{ BIND(<http://dbpedia.org/sparql> AS ?service)}
UNION
{ BIND(<http://live.dbpedia.org/sparql> AS ?service)}
SERVICE ?service
{<http://dbpedia.org/resource/Paris> ?p ?o. }
}
==>
(project (?p ?o)
(join
(union
(extend ((?service <http://dbpedia.org/sparql>))
(table unit))
(extend ((?service <http://live.dbpedia.org/sparql>))
(table unit)))
(service ?service
(bgp (triple <http://dbpedia.org/resource/Paris> ?p ?o)))))
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(project (?p ?o)
(sequence
(union
(extend ((?service <http://dbpedia.org/sparql>))
(table unit))
(extend ((?service <http://live.dbpedia.org/sparql>))
(table unit)))
(service ?service
(bgp (triple <http://dbpedia.org/resource/Paris> ?p ?o)))))
> Linearization optimization does not account for SERVICE correctly.
> ------------------------------------------------------------------
>
> Key: JENA-174
> URL: https://issues.apache.org/jira/browse/JENA-174
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ, Optimizer
> Reporter: Andy Seaborne
> Priority: Minor
>
> {noformat}
> SELECT ?p ?o WHERE
> {
> { BIND(<http://dbpedia.org/sparql> AS ?service)}
> UNION
> { BIND(<http://live.dbpedia.org/sparql> AS ?service)}
> SERVICE ?service
> {<http://dbpedia.org/resource/Paris> ?p ?o. }
> }
> {noformat}
> ==>
> {noformat}
> (project (?p ?o)
> (join
> (union
> (extend ((?service <http://dbpedia.org/sparql>))
> (table unit))
> (extend ((?service <http://live.dbpedia.org/sparql>))
> (table unit)))
> (service ?service
> (bgp (triple <http://dbpedia.org/resource/Paris> ?p ?o)))))
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> (project (?p ?o)
> (sequence
> (union
> (extend ((?service <http://dbpedia.org/sparql>))
> (table unit))
> (extend ((?service <http://live.dbpedia.org/sparql>))
> (table unit)))
> (service ?service
> (bgp (triple <http://dbpedia.org/resource/Paris> ?p ?o)))))
> {noformat}
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