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https://issues.apache.org/jira/browse/LUCENE-7401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-7401.
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Resolution: Fixed
Fix Version/s: 6.4
master (7.0)
Thanks Mike for having a look.
> BKDWriter should ensure all dimensions are indexed
> --------------------------------------------------
>
> Key: LUCENE-7401
> URL: https://issues.apache.org/jira/browse/LUCENE-7401
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Adrien Grand
> Priority: Minor
> Fix For: master (7.0), 6.4
>
> Attachments: LUCENE-7401.patch
>
>
> The current heuristic is to use the dimension that has the largest span, so
> if dimensions have a different distribution of values, we could theoretically
> (but maybe in practice too?) end up with one dimension that is not indexed at
> all and queries that are mostly selective on this dimension would need to
> scan lots of blocks.
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