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https://issues.apache.org/jira/browse/LUCENE-4978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13786287#comment-13786287
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oli mcc edited comment on LUCENE-4978 at 10/4/13 4:20 PM:
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Hi David,
I think I've uncovered this same issue via Elasticsearch, see [issue 3795 |
https://github.com/elasticsearch/elasticsearch/issues/3795] and have verified
it with some test cases I've written. Any chance you'd have time to take a look
at this? I'm digging in myself, but am still just at a stage of getting a sense
for the codebase.
was (Author: olimcc):
Hi David
I think I've uncovered this same issue via Elasticsearch, see [issue 3795 |
https://github.com/elasticsearch/elasticsearch/issues/3795] and have verified
it with some test cases I've written. Any chance you'd have time to take a look
at this? I'm digging in myself, but am still just at a stage of getting a sense
for the codebase.
> Spatial search with point query won't find identical indexed point
> ------------------------------------------------------------------
>
> Key: LUCENE-4978
> URL: https://issues.apache.org/jira/browse/LUCENE-4978
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/spatial
> Affects Versions: 4.1
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Minor
>
> Given a document with indexed POINT (10 20), when a search for INTERSECTS(
> POINT (10 20)) is issued, no results are returned.
> The work-around is to not search with a point shape, use a very small-radius
> circle or rectangle. (I'm marking this issue as "minor" because it's easy to
> do this).
> An unstated objective of the PrefixTree/grid approximation is that no matter
> what precision you use, an intersects query will find all true-positives.
> Due to approximations, it may also find some close false-positives. But in
> the case above, that unstated promise is violated. But it can also happen
> for query shapes other than points which do in fact barely enclose the point
> given at index time yet the indexed point is in-effect shifted to the center
> point of a cell which could be outside the query shape, and ultimately
> leading to a false-negative.
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