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https://issues.apache.org/jira/browse/LUCENE-7401?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15778007#comment-15778007
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ASF subversion and git services commented on LUCENE-7401:
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Commit 0c1cab71920a540807555501f7198ca402e16740 in lucene-solr's branch
refs/heads/branch_6x from [~jpountz]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=0c1cab7 ]
LUCENE-7401: Make sure BKD trees index all dimensions.
> 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
> 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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