[jira] [Created] (MARMOTTA-492) Issue With a SPARQL Query

["Maxime Poitevineau-Millin (JIRA)" <ji...@apache.org>]

Maxime Poitevineau-Millin  created MARMOTTA-492:
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             Summary: Issue With a SPARQL Query
                 Key: MARMOTTA-492
                 URL: https://issues.apache.org/jira/browse/MARMOTTA-492
             Project: Marmotta
          Issue Type: Bug
          Components: Sesame Tools
    Affects Versions: 3.2.0
            Reporter: Maxime Poitevineau-Millin 


We are currently implementing marmotta in our system but!

When trying this query :

SELECT * FROM <sesame:nil> {


                               ?kw rdf:type Keyword . 
                               ?kw2 rdf:type Keyword . 
                               ?kw2 ?rel ?kw . 

}

on a database containing 60 000 keywords, marmotta is creating 60 000 * 60 000 queries similar to this one : 
SELECT id,subject,predicate,object,context,deleted,inferred,creator,createdAt,deletedAt FROM triples WHERE deleted = false AND subject = '458172920399523841' AND object = '458172732532453376' AND context = '458172711103754240'

Which obviously takes a long time.

This query takes 2 sec on Virtuoso or Owlim, is there any configuration issue or something we should change?




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