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From "Alan Woodward (JIRA)" <>
Subject [jira] [Commented] (LUCENE-8630) Allow boosting of particular interval sources
Date Tue, 08 Jan 2019 13:54:00 GMT


Alan Woodward commented on LUCENE-8630:

Another paper that looks relevant here:

> Allow boosting of particular interval sources
> ---------------------------------------------
>                 Key: LUCENE-8630
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Alan Woodward
>            Assignee: Alan Woodward
>            Priority: Major
>         Attachments: LUCENE-8630.patch
> In positional queries, it's common to want to promote some terms over others; for example,
in lists of synonyms you may want the original term to be weighted more, or more specific
terms to receive higher weights than less specific ones.
> Span queries have the 'SpanBoostQuery', which is currently broken; and a 'PayloadScoreQuery'
which allows direct modification of the score based on stored payloads, but which does not
deal well with a mix of terms with-and-without payloads, and which ends up exposing a lot
of the terms API, making it very difficult to customize.
> For interval queries, I'd like to try a different approach, adding a float-valued 'boost()'
method to IntervalIterator.  This would make it easy to add simple boosts around particular
terms in terms lists, and also allow more fine-grained control using payloads without having
to expose the mechanics of the PostingsEnum

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