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https://issues.apache.org/jira/browse/JENA-1831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Seaborne resolved JENA-1831.
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Fix Version/s: Jena 3.15.0
Assignee: Andy Seaborne
Resolution: Fixed
> Algebra transform to optimize queries fails with a certain type of Union
> ------------------------------------------------------------------------
>
> Key: JENA-1831
> URL: https://issues.apache.org/jira/browse/JENA-1831
> Project: Apache Jena
> Issue Type: Bug
> Components: SDB
> Affects Versions: Jena 3.11.0, Jena 3.12.0, Jena 3.13.0, Jena 3.14.0
> Reporter: Graham Triggs
> Assignee: Andy Seaborne
> Priority: Major
> Fix For: Jena 3.15.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> Encountered a case using a UNION in a query to select e.g. objects where type
> is asserted as X, Y or Z (but not A, B, C, etc.)
> Pull request prevents the transformer from copying restrictions out of a
> UNION so that the algebra is correct in this case.
> Includes a test for a query that exhibits the problem. All previously
> existing transformer tests are unmodified and continue to pass, as do all the
> other unit tests in SDB.
> [https://github.com/apache/jena/pull/681]
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