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https://issues.apache.org/jira/browse/LUCENE-8300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16494965#comment-16494965
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Alan Woodward commented on LUCENE-8300:
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Here's an updated patch. {{Intervals.unordered}} now takes a boolean
(defaulting to {{true}}) that says whether or not to allow overlaps.
[~jim.ferenczi] I think there's already a test that does what you ask?
Checking for {{porridge}} unordered with {{pease porridge hot}}
> Add unordered-distinct IntervalsSource
> --------------------------------------
>
> Key: LUCENE-8300
> URL: https://issues.apache.org/jira/browse/LUCENE-8300
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Priority: Major
> Attachments: LUCENE-8300.patch, LUCENE-8300.patch
>
>
> [~mattweber] pointed out on LUCENE-8196 that {{Intervals.unordered()}}
> doesn't check to see if its subintervals overlap, which means that for
> example {{Intervals.unordered(Intervals.term("a"), Intervals.term("a"))}}
> would match a document with {{a}} appearing only once. This ticket will
> introduce a new function, {{Intervals.unordered_distinct()}}, that ensures
> that all subintervals within an unordered interval do not overlap.
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