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https://issues.apache.org/jira/browse/LUCENE-8196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16417092#comment-16417092
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Alan Woodward commented on LUCENE-8196:
---------------------------------------

I talked over disjunction ordering with [~jim.ferenczi], and we agreed to 
revert back to the ordering specified in the original paper.  In future it 
might be worth contacting the authors and seeing if they've covered the case of 
prefix disjunctions elsewhere.

I think this is ready?

> Add IntervalQuery and IntervalsSource to expose minimum interval semantics 
> across term fields
> ---------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-8196
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8196
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: Alan Woodward
>            Assignee: Alan Woodward
>            Priority: Major
>         Attachments: LUCENE-8196.patch, LUCENE-8196.patch, LUCENE-8196.patch, 
> LUCENE-8196.patch, LUCENE-8196.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> This ticket proposes an alternative implementation of the SpanQuery family 
> that uses minimum-interval semantics from 
> [http://vigna.di.unimi.it/ftp/papers/EfficientAlgorithmsMinimalIntervalSemantics.pdf]
>  to implement positional queries across term-based fields.  Rather than using 
> TermQueries to construct the interval operators, as in LUCENE-2878 or the 
> current Spans implementation, we instead use a new IntervalsSource object, 
> which will produce IntervalIterators over a particular segment and field.  
> These are constructed using various static helper methods, and can then be 
> passed to a new IntervalQuery which will return documents that contain one or 
> more intervals so defined.



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