[jira] [Commented] (JENA-1774) Optimize DISTINCT-ORDERBY

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-1774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16960675#comment-16960675 ] 

ASF subversion and git services commented on JENA-1774:
-------------------------------------------------------

Commit 454de48f62616017af2e03e0a2d3651ed30f89e2 in jena's branch refs/heads/master from Andy Seaborne
[ https://gitbox.apache.org/repos/asf?p=jena.git;h=454de48 ]

Merge pull request #622 from afs/jena-1774_distinct-orderby

JENA-1774: Reorder SELECT DISTINCT * ORDER BY

> Optimize DISTINCT-ORDERBY
> -------------------------
>
>                 Key: JENA-1774
>                 URL: https://issues.apache.org/jira/browse/JENA-1774
>             Project: Apache Jena
>          Issue Type: Improvement
>          Components: ARQ
>    Affects Versions: Jena 3.13.1
>            Reporter: Andy Seaborne
>            Assignee: Andy Seaborne
>            Priority: Major
>             Fix For: Jena 3.14.0
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> {{TransformOrderByDistinctApplication}} is missing the chance to rewrite the form:
> {noformat}
> SELECT DISTINCT * { ...} ORDER BY ...
> {noformat}
> which is
> {noformat}
>     (distinct
>         (order ...
> {noformat}
> and could be
> {noformat}
>     (order ...
>         (distinct
> {noformat}
> {{TransformOrderByDistinctApplication}} does already rewrite when there is a projection.
> {noformat}
> SELECT DISTINCT ?x { ...} ORDER BY ?x
> {noformat}
> {noformat}
>     (order (?x)
>         (distinct
>             (project (?x)
> {noformat}



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