[JENA-1774] Optimize DISTINCT-ORDERBY

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.13.1
• Fix Version/s: Jena 3.14.0
• Component/s: ARQ
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 24/Oct/19 09:19
• Updated: 19/Jan/20 18:18
• Resolved: 27/Oct/19 20:36

Description

TransformOrderByDistinctApplication is missing the chance to rewrite the form:

SELECT DISTINCT * { ...} ORDER BY ...

which is

    (distinct
        (order ...

and could be

    (order ...
        (distinct

TransformOrderByDistinctApplication does already rewrite when there is a projection.

SELECT DISTINCT ?x { ...} ORDER BY ?x

    (order (?x)
        (distinct
            (project (?x)

Issue Links

• links to: GitHub Pull Request #622
• links to: GitHub Pull Request #624