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https://issues.apache.org/jira/browse/LUCENE-6852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15081213#comment-15081213
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ASF subversion and git services commented on LUCENE-6852:
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Commit 1722882 from [~mikemccand] in branch 'dev/branches/branch_5x'
[ https://svn.apache.org/r1722882 ]
LUCENE-6852: deprecate BKD tree for future dimensional values
> Add DimensionalFormat to Codec
> ------------------------------
>
> Key: LUCENE-6852
> URL: https://issues.apache.org/jira/browse/LUCENE-6852
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: Trunk
>
> Attachments: LUCENE-6852.patch
>
>
> This is phase 2 for adding dimensional indexing in Lucene, so we can
> (eventually) do efficient numeric range filtering, BigInteger/Decimal and
> IPv6 support, and "point in shape" spatial searching (2D or 3D).
> It's the follow-on from LUCENE-6825 (phase 1).
> This issue "just" adds DimensionalFormat (and Reader/Writer) to Codec and the
> IndexReader hierarchy, to IndexWriter and merging, and to document API
> (DimensionalField).
> I also implemented dimensional support for SimpleTextCodec, and added a test
> case showing that you can in fact use SimpleTextCodec to do multidimensional
> shape intersection (seems to pass a couple times!).
> Phase 3 will be adding support to the default codec as well ("just" wrapping
> BKDWriter/Reader), phase 4 is then fixing places that use the
> sandbox/spatial3d BKD tree to use the codec instead and maybe exposing
> sugar for numerics, things like BigInteger/Decimal, etc.
> There are many nocommits still, but I think it's close-ish ... I'll commit to
> a branch and iterate there.
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