[jira] [Created] (LUCENE-4869) Fix the Within spatial predicate PrefixTree to remove false-positives

["David Smiley (JIRA)" <ji...@apache.org>]

David Smiley created LUCENE-4869:
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             Summary: Fix the Within spatial predicate PrefixTree to remove false-positives
                 Key: LUCENE-4869
                 URL: https://issues.apache.org/jira/browse/LUCENE-4869
             Project: Lucene - Core
          Issue Type: Improvement
          Components: modules/spatial
            Reporter: David Smiley


LUCENE-4644 adds a useful initial capability to implement the "Within" predicate for a RecursivePrefixTree based field.  But it will match false-positives for indexed shapes comprised of multiple disjoint parts.  The solution to be worked out here is to index a point per disjoint part in such a way that it can be easily retrieved (e.g. DocValues) and then a post-process to WithinPrefixTreeFilter would remove false-positives.

I didn't call this a 'bug' because this addresses a known temporary limitation, and Within is still useful despite this.

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