[LUCENE-736] Sloppy Phrase Scorer matches the doc "A B C D E" for query = "B C B"~2

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.2
• Component/s: core/search
• Lucene Fields: Patch Available
• Assignee: Doron Cohen
• Reporter: Doron Cohen
• Created: 01/Dec/06 09:13
• Updated: 28/Aug/22 11:32
• Resolved: 24/Apr/07 05:37

Description

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.

Issue Links

• relates to: LUCENE-697 Scorer.skipTo affects sloppyPhrase scoring