[ http://issues.apache.org/jira/browse/LUCENE-72?page=all ]
Dejan Nenov updated LUCENE-72:
------------------------------
Attachment: TestRegressionLucene72.java
Please ignore the previos version - it was very sloppy.
I added one more test, which yields a strange (for me) result:
fruits OR -tomatoes
returns only:
fruits vegetables peppers kiwis
fruits vegetables peppers bananas
but does not return:
fruits vegetables tomatoes bananas
fruits vegetables tomatoes kiwis
I would expected all four docs to match?
> [PATCH] Query parser inconsistency when using terms to exclude.
> ---------------------------------------------------------------
>
> Key: LUCENE-72
> URL: http://issues.apache.org/jira/browse/LUCENE-72
> Project: Lucene - Java
> Issue Type: Bug
> Components: QueryParser
> Affects Versions: 1.2
> Environment: Operating System: All
> Platform: PC
> Reporter: Carlos
> Assigned To: Lucene Developers
> Attachments: patch6.txt, patch7.txt, TestRegressionLucene72.java,
> TestRegressionLucene72.java
>
>
> Hi.
> The problem I am having occurs when using queryparser and also when building
> the
> query using the API.
> Assume that we want to look for documents about fruits or vegetables but
> excluding tomatoes and bananas. I suppose the right query sould be:
> +(fruits vegetables) AND (-tomatoes -bananas)
> wich I think is equivalent to (if tou parse it and then print the
> query.toString
> ("") result that is what you get)
> +(fruits vegetables) +(-tomatoes -bananas)
> but the query doesn't work as expected, in fact the query that works is
> +(fruits vegetables) -(-tomatoes -bananas)
> which doesn´t really make much sense, because the second part seems to say:
> All documents where the condition "tomatoes is not present and bananas is not
> present " is false, which means the opposite.
> In fact, second query works as (even if they look quite opposite):
> +(fruits vegetables) -tomatoes -bananas
> Hope someone could help, thanks
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