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From "paul.elschot (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-569) NearSpans skipTo bug
Date Sun, 03 Sep 2006 09:27:23 GMT
     [ http://issues.apache.org/jira/browse/LUCENE-569?page=all ]

paul.elschot updated LUCENE-569:
--------------------------------

    Attachment: NearSpans20060903.patch

NearSpans20060903.patch combines the changes for the bug fix on the
following files against revision 439747 (today):

src/java/org/apache/lucene/search/spans/NearSpansOrdered.java, added
src/java/org/apache/lucene/search/spans/NearSpansUnordered.java, added
src/java/org/apache/lucene/search/spans/SpanNearQuery.java, changed
src/test/org/apache/lucene/search/spans/TestNearSpans.java, added
src/java/org/apache/lucene/search/spans/NearSpans.java, deleted.

This obsoletes the patch to SpanNearQuery.java.
(It leaves out one line of commented code that is  in the separate patch for SpanNearQuery.java
.)

The added NearSpansUnordered is a simple specialisation of the deleted
NearSpans for the unordered case.

Regards,
Paul Elschot



> NearSpans skipTo bug
> --------------------
>
>                 Key: LUCENE-569
>                 URL: http://issues.apache.org/jira/browse/LUCENE-569
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Search
>            Reporter: Hoss Man
>         Attachments: common-build.assertions.patch, NearSpans20060903.patch, NearSpansOrdered.java,
NearSpansUnordered.java, SpanNearQuery20060622.patch, SpanScorer.explain.testcase.patch, TestNearSpans.java
>
>
> NearSpans appears to have a bug in skipTo that causes it to skip over some matching documents
completely.  I discovered this bug while investigating problems with SpanWeight.explain, but
as far as I can tell the Bug is not specific to Explanations ... it seems like it could potentially
result in incorrect matching in some situations where a SpanNearQuery is nested in another
query such thatskipTo will be used ... I tried to create a high level test case to exploit
the bug when searching, but i could not.  TestCase exploiting the class using NearSpan and
SpanScorer will follow...

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