Sloppy Phrase Scoring Misbehavior
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Key: LUCENE-736
URL: http://issues.apache.org/jira/browse/LUCENE-736
Project: Lucene - Java
Issue Type: Bug
Components: Search
Reporter: Doron Cohen
Assigned To: Doron Cohen
Priority: Minor
This is an extension of https://issues.apache.org/jira/browse/LUCENE-697
In addition to abnormalities Yonik pointed out in 697, there seem to be other
issues with slopy phrase search and scoring.
1) A phrase with a repeated word would be detected in a document although it is
not there.
I.e. document = A B D C E , query = "B C B" would not find this document (as
expected), but query "B C B"~2 would find it.
I think that no matter how large the slop is, this document should not be a
match.
2) A document containing both orders of a query, symmetrically, would score
differently for the queru and for its reveresed form.
I.e. document = A B C B A would score differently for queries "B C"~2 and "C
B"~2, although it is symmetric to both.
I will attach test cases that show both these problems and the one reported by
Yonik in 697.
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