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https://issues.apache.org/jira/browse/LUCENE-8645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16745064#comment-16745064
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Alan Woodward commented on LUCENE-8645:
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Here is a patch - this turns out be remarkably simple to implement.
> Add fixed field intervals
> -------------------------
>
> Key: LUCENE-8645
> URL: https://issues.apache.org/jira/browse/LUCENE-8645
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Priority: Major
> Attachments: LUCENE-8645.patch
>
>
> It can be useful to report intervals from one fields as if they came from
> another. For example, fast prefix searches can be implemented by indexing
> text into two fields, one with the full terms and one with edge-ngrams
> enabled; to do proximity searches against terms and prefixes, you could wrap
> a term query against the ngrammed field so that its intervals appear to come
> from the normal field, and use it an an ordered or unordered interval.
> This is analogous to the FieldMaskingSpanQuery, but has the advantage that we
> don't use term statistics for scoring interval queries, so there is no issue
> with mixing up field weights from different fields.
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