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From "Alan Woodward (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-8196) Add IntervalQuery and IntervalsSource to expose minimum interval semantics across term fields
Date Mon, 03 Sep 2018 12:46:03 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-8196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16602117#comment-16602117
] 

Alan Woodward commented on LUCENE-8196:
---------------------------------------

[~Martin Hermann] seeing as this ticket is closed, I opened LUCENE-8477 to continue discussion.

> 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
>             Fix For: 7.4
>
>         Attachments: LUCENE-8196-debug.patch, 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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