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https://issues.apache.org/jira/browse/LUCENE-4885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13624737#comment-13624737
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Shai Erera commented on LUCENE-4885:
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I think that this statistic needs to be on FacetResultNode, and not
FacetResult, because if someone asks for "topK in each node (depth > 1)", we
should compute this statistic on each node at each level. That today is
supported only by StandardFA, but still. Initially, when I thought about this
issue, I thought that FacetResult.numValidDescendants is the data you needed,
but then realized it's not (it's the sum of topK at all levels).
On FRN, it should be like the other fields, public and not set in the ctor.
> each FacetResult should return the facet equivalent of totalHits
> ----------------------------------------------------------------
>
> Key: LUCENE-4885
> URL: https://issues.apache.org/jira/browse/LUCENE-4885
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Labels: newdev
> Fix For: 5.0, 4.3
>
> Attachments: LUCENE-4885.patch
>
>
> This is cheap to compute, since the TopKFRH already must visit all
> non-zero-count ords under the FacetRequest.categoryPath.
> This can be useful to a front end, eg to know whether to present a "More..."
> under that dimension or not, whether to use a suggester like LinkedIn's facet
> UI, etc.
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