[jira] [Commented] (LUCENE-7398) Nested Span Queries are buggy

["Alan Woodward (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-7398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15404518#comment-15404518 ] 

Alan Woodward commented on LUCENE-7398:
---------------------------------------

I think this is a bug in SpanPositionQueue, where longer Spans should be sorted before shorter ones at the same position - will dig and see if I can get a fix in shortly.

> Nested Span Queries are buggy
> -----------------------------
>
>                 Key: LUCENE-7398
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7398
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/search
>    Affects Versions: 5.5, 6.x
>            Reporter: Christoph Goller
>            Assignee: Alan Woodward
>            Priority: Critical
>         Attachments: TestSpanCollection.java
>
>
> Example for a nested SpanQuery that is not working:
> Document: Human Genome Organization , HUGO , is trying to coordinate gene mapping research worldwide.
> Query: spanNear([body:coordinate, spanOr([spanNear([body:gene, body:mapping], 0, true), body:gene]), body:research], 0, true)
> The query should match "coordinate gene mapping research" as well as "coordinate gene research". It does not match  "coordinate gene mapping research" with Lucene 5.5 or 6.1, it did however match with Lucene 4.10.4. It probably stopped working with the changes on SpanQueries in 5.3. I will attach a unit test that shows the problem.



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