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https://issues.apache.org/jira/browse/SOLR-5170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14048437#comment-14048437
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David Smiley commented on SOLR-5170:
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Thanks for maintaining the patch, [~jwartes]. Sorry, I won't have time for
awhile to get to this, which is kinda blocked by another issue ( SOLR-4329 ).
Going with the SortedSetDocValues approach is kinda tempting.
> Spatial multi-value distance sort via DocValues
> -----------------------------------------------
>
> Key: SOLR-5170
> URL: https://issues.apache.org/jira/browse/SOLR-5170
> Project: Solr
> Issue Type: New Feature
> Components: spatial
> Reporter: David Smiley
> Assignee: David Smiley
> Attachments: SOLR-5170_spatial_multi-value_sort_via_docvalues.patch,
> SOLR-5170_spatial_multi-value_sort_via_docvalues.patch,
> SOLR-5170_spatial_multi-value_sort_via_docvalues.patch.txt
>
>
> The attached patch implements spatial multi-value distance sorting. In other
> words, a document can have more than one point per field, and using a
> provided function query, it will return the distance to the closest point.
> The data goes into binary DocValues, and as-such it's pretty friendly to
> realtime search requirements, and it only uses 8 bytes per point.
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