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https://issues.apache.org/jira/browse/JENA-2317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Seaborne resolved JENA-2317.
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Resolution: Fixed
> Apply BGP reorder before filter placement.
> ------------------------------------------
>
> Key: JENA-2317
> URL: https://issues.apache.org/jira/browse/JENA-2317
> Project: Apache Jena
> Issue Type: Improvement
> Components: ARQ
> Affects Versions: Jena 4.4.0
> Reporter: Andy Seaborne
> Assignee: Andy Seaborne
> Priority: Major
> Fix For: Jena 4.5.0
>
>
> The reordering of BGPs is usually left until execution because the pattern
> may become more grounded during execution.
> Filter are moved around during the optimization of the algebra. This can
> break up BGPs by putting a filter in the middle of them and that then blocks
> reordering. Specifically, a triple pattern with two ground terms (and the
> property is not rdf:type) usually yields only a few results. But if we have a
> BGP where first pattern is a triple pattern of one ground term and a
> restriction on the object value (as occurs in BSBM Q5), reordering does not
> find the better starting point.
>
>
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