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https://issues.apache.org/jira/browse/JENA-500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13729654#comment-13729654
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Rob Vesse edited comment on JENA-500 at 8/5/13 5:07 PM:
--------------------------------------------------------
Couple more examples that highlight the issue:
{noformat}
ASK WHERE { FILTER (?x = <http://constant>) }
{noformat}
Also a more useful example that TQ uses:
{noformat}
SELECT *
WHERE
{
BIND(ex:function(?x) AS ?y)
FILTER ( ?prebound = ?y )
}
{noformat}
was (Author: rvesse):
Couple more examples that highlight the issue:
ASK WHERE { FILTER (?x = <http://constant>) }
Also a more useful example that TQ uses:
SELECT *
WHERE
{
BIND(ex:function(?x) AS ?y)
FILTER ( ?prebound = ?y )
}
> SPARQL optimizer does not consider pre-bound variables, creates wrong query
> ---------------------------------------------------------------------------
>
> Key: JENA-500
> URL: https://issues.apache.org/jira/browse/JENA-500
> Project: Apache Jena
> Issue Type: Bug
> Components: Optimizer
> Affects Versions: Jena 2.10.2
> Reporter: Holger Knublauch
> Attachments: TestPreboundFilter.java
>
>
> There is a regression bug somewhere between 2.7.2 and 2.10.2.
> See test case which works green in the old version but fails on the
> latest snapshot. I believe the cause is that
> TransformFilterImplicitJoin.testSpecialCaseUnused() incorrectly assumes
> it can ignore the whole query if it encounters unbound variables.
> However, in my case the variables do have values, coming from the
> initial binding of the QueryExecution.
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