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Bug #150

OPTIONAL not returning expected results

Added by Paula Gearon almost 14 years ago. Updated almost 14 years ago.

Status:
Closed
Priority:
High
Assignee:
Category:
Mulgara
Target version:
Start date:
Due date:
% Done:

0%

Estimated time:
Resolution:
fixed

Description

Unexpected results on an OPTIONAL clause. The toString on a query that demonstrates the problem is:

SELECT $o1 $o2
FROM http://mulgara.org/local/server1#
WHERE ( optional ( optional ( and
[$s urn:test:pred1 $o1 $-anon-ctx1]
[$-anon-ctx1 rdf:type http://mulgara.org/mulgara#sailModel
http://mulgara.org/mulgara#sailModel]
) ( and
[$s urn:test:pred2 $o2 $-anon-ctx4]
[$-anon-ctx4 rdf:type http://mulgara.org/mulgara#sailModel
http://mulgara.org/mulgara#sailModel]
)
) ( and
[$s urn:test:pred2 $o2 $-anon-ctx7]
[$-anon-ctx7 rdf:type http://mulgara.org/mulgara#sailModel
http://mulgara.org/mulgara#sailModel]
[$s urn:test:pred3 $o1 $-anon-ctx10]
[$-anon-ctx10 rdf:type http://mulgara.org/mulgara#sailModel
http://mulgara.org/mulgara#sailModel]
)
) GIVEN 0 columns: (1 rows
)

The data is generated with:

               con.add(subj1, pred1, obj1);
               con.add(subj1, pred2, obj2);
               con.add(subj1, pred3, obj3);

The results we get are:
var: $o2
tuples:
{$o2     $-anon-ctx10  $o1     $s      $-anon-ctx7  (1 rows)
[000037  000032  000039  000033  000032  ]
}

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