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https://issues.apache.org/jira/browse/JENA-97?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13122581#comment-13122581
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Paolo Castagna commented on JENA-97:
------------------------------------
Hi Simon, I do not think this is a problem specific to TxTDB. It behaves as old
TDB. I am also not sure it's a problem.
I tried to run this query instead (with GRAPH ?g):
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX people: <http://example.org/xmlns/people_aFu6gPBlEeCFPq5DAUl-2A/>
SELECT ?aUri ?name
WHERE {
GRAPH ?g {
?aUri a people:Person .
?aUri foaf:knows*/foaf:name ?name
}
}
And I get these results:
-------------------------------------------------------------
| aUri | name |
=============================================================
| <https://front.side/jazz/people/eomer.nt> | "eomer" |
| <https://front.side/jazz/people/eowyn.nt> | "eowyn" |
| <https://front.side/jazz/people/theodred.nt> | "theodred" |
-------------------------------------------------------------
> TDB 0.9.0 snapshot sometimes returns a SELECT binding twice
> -----------------------------------------------------------
>
> Key: JENA-97
> URL: https://issues.apache.org/jira/browse/JENA-97
> Project: Jena
> Issue Type: Bug
> Components: TDB
> Environment: tx-tdb-0.9.0-20111006.082548-13-dist
> Reporter: Simon Helsen
> Assignee: Andy Seaborne
> Attachments: quads.txt
>
>
> Very sometimes (rare), it seems that a result set will repeat the first
> SELECT binding. E.g.
> SELECT ?a ?b ...
> will bind ?a twice in the result set. It only happens quite rarely, but the
> same queries behave correctly in TDB 0.8.7.
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