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https://issues.apache.org/jira/browse/JENA-587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13819993#comment-13819993
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Rob Vesse edited comment on JENA-587 at 11/12/13 10:56 AM:
-----------------------------------------------------------
More recent versions of ARQ automatically optimise DISTINCT -> REDUCED which
may leave some duplicates.
Due to the predictable way in which TDB returns scan results and ARQ executes
joins for most queries this is a non-issue since the two queries will be
equivalent since REDUCED in ARQ eliminates neighbouring non-distinct solutions.
This behaviour can be turned off like so:
{noformat}
ARQ.getContext().set(ARQ.optDistinctToReduced, false)
{noformat}
was (Author: rvesse):
More recent of versions automatically optimise DISTINCT -> REDUCED which may
leave some duplicates.
Due to the predictable way in which TDB returns scan results and ARQ executes
joins for most queries this is a non-issue since the two queries will be
equivalent since REDUCED in ARQ eliminates neighbouring non-distinct solutions.
This behaviour can be turned off like so:
{noformat}
ARQ.getContext().set(ARQ.optDistinctToReduced, false)
{noformat}
> SELECT DISTINCT returns duplicate results
> -----------------------------------------
>
> Key: JENA-587
> URL: https://issues.apache.org/jira/browse/JENA-587
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ
> Affects Versions: Jena 2.11.0
> Reporter: Veyriere
> Attachments: bug Jena2.11.0.zip
>
>
> SELECT DISTINCT returns duplicate results. Attaching a small quads dump and
> the query to reproduce with TDB
> Reproduced with Jena 2.11.0 and Jena 2.10.1 (was working with 2.7.4)
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