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https://issues.apache.org/jira/browse/LUCENE-10274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17455990#comment-17455990
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Greg Miller edited comment on LUCENE-10274 at 12/8/21, 9:05 PM:
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I was thinking that this would work over the same doc values indexed when
creating "Point" fields (e.g., LongPoint), which is a binary field encoding all
N dimensions into a single byte entry. So the faceting logic would inspect a
single binary field encoding the N dimensions, testing whether-or-not it's
contained in each hyperrectangle of interest.
UPDATE: Actually, I think I was confusing the current Point field impl with
something else. I just glanced at the code and there isn't a current dv field
of course (just the inverted points index). So yeah, will need some thought as
to how to encode these as dvs.
was (Author: gsmiller):
I was thinking that this would work over the same doc values indexed when
creating "Point" fields (e.g., LongPoint), which is a binary field encoding all
N dimensions into a single byte entry. So the faceting logic would inspect a
single binary field encoding the N dimensions, testing whether-or-not it's
contained in each hyperrectangle of interest.
> Implement "hyperrectangle" faceting
> -----------------------------------
>
> Key: LUCENE-10274
> URL: https://issues.apache.org/jira/browse/LUCENE-10274
> Project: Lucene - Core
> Issue Type: New Feature
> Components: modules/facet
> Reporter: Greg Miller
> Priority: Minor
>
> I'd be interested in expanding Lucene's faceting capabilities to aggregate a
> point field against a set of user-provided n-dimensional
> [hyperrectangles|https://en.wikipedia.org/wiki/Hyperrectangle]. This would be
> a generalization of {{LongRangeFacets}} / {{DoubleRangeFacets}} from a single
> dimension to n-dimensions, and would compliment {{PointRangeQuery}} well,
> providing the ability to facet ahead of "drilling down" on such a query.
> As a motivating use-case, imagine searching against movie documents that
> contain a 2-dimensional point storing "awards" the movie has received. One
> dimension encodes the year the award was won, while the other encodes the
> type of award as an ordinal. For example, the film "Nomadland" won the
> "Academy Awards Best Picture" award in 2021. Imagine providing a
> two-dimensional refinement to users allowing them to filter by the
> combination of award + year in a single action (e.g., using
> {{{}PointRangeQuery{}}}) and needing to get facet counts for these
> combinations ahead of time.
> Curious if the community thinks this functionality would be useful. Any
> thoughts?
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