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From "David Smiley (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-4978) Spatial search with point query won't find identical indexed point
Date Fri, 04 Oct 2013 19:16:43 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-4978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

David Smiley updated LUCENE-4978:
---------------------------------

    Fix Version/s: 4.6

> 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
>             Fix For: 4.6
>
>
> 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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