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Posted to dev@jena.apache.org by "Elie Roux (Jira)" <ji...@apache.org> on 2020/01/22 10:44:00 UTC

[jira] [Created] (JENA-1825) disabling some optimizations

Elie Roux created JENA-1825:
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             Summary: disabling some optimizations
                 Key: JENA-1825
                 URL: https://issues.apache.org/jira/browse/JENA-1825
             Project: Apache Jena
          Issue Type: Improvement
          Components: ARQ
    Affects Versions: Jena 3.14.0
            Reporter: Elie Roux


It would be useful to have a mechanism to disable some optimizations in SPARQL. The reason is that sometimes optimizations hinder performances. For instance FILTERs with long INs result in large unions which are less performant than a filter on a small dataset. This really depends on the queries but can have a big impact.

See also https://github.com/w3c/sparql-12/issues/105



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