[jira] [Updated] (LUCENE-7240) Remove DocValues from LatLonPoint, add DocValuesField for that

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-7240:
--------------------------------
    Attachment: LUCENE-7240.patch

Here is a patch splitting it out.

I ran rough indexing benchmark with luceneutil:

previous (docvalues + points):
INDEX SIZE: 1.0679643917828798 GB
380.419779939 sec to index part 0

patch (points only)
INDEX SIZE: 0.6146336644887924 GB
359.832694579 sec to index part 0

So it doesn't buy you a lot on index time, but helps index-size if you don't need sorting or similar. And it keeps the stuff organized similar to other fields in core.

> Remove DocValues from LatLonPoint, add DocValuesField for that
> --------------------------------------------------------------
>
>                 Key: LUCENE-7240
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7240
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>         Attachments: LUCENE-7240.patch
>
>
> LatLonPoint needed two-phase intersection initially because of big inefficiencies, but as of LUCENE-7239 all of its query operations:  {{newBoxQuery()}}, {{newDistanceQuery()}}, {{newPolygonQuery()}} and {{nearest()}} only need the points datastructure (BKD).
> If you want to do {{newDistanceSort()}} then you need docvalues for that, but I think it should be moved to a separate field: e.g. docvalues is optional just like any other field in lucene. We can add other methods that make sense to that new docvalues field (e.g. facet by distance/region, expressions support, whatever). It is really disjoint from the core query support: and also currently has a heavyish cost of ~64-bits per value in space.



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