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From markwaddle <>
Subject Re: Unexpected boolean query behavior
Date Thu, 14 Jan 2010 20:38:34 GMT

That is a reasonable question. The problem here is that my users have already
created numerous queries just like this one, using ANDs and ORs. My users
are very technical and they have been using the results of these queries for
months now to perform analysis that drives business decisions. I need an
explanation for why this is happening so I can not only train them on how to
use it more effectively, but also to restore their trust in the search

Does anyone understand this behavior? Or can you recommend a place for me to

Otis Gospodnetic wrote:
> Mark,
> Does it help if you rewrite your query using +/- syntax ("required",
> "prohibited"), or nothing for "should"?  Because that's what happens under
> the hood (terms are required, prohibited, or should occur).
> Otis
> --
> Sematext -- -- Solr - Lucene - Nutch
> ----- Original Message ----
>> From: markwaddle <>
>> To:
>> Sent: Thu, January 14, 2010 2:39:21 PM
>> Subject: Unexpected boolean query behavior
>> Here is my query:
>> (virt* AND "machine fingerprinting") OR (virt* AND encryption) OR (virt*
>> AND
>> anonymous) OR (virt* AND analytic*) AND owned:true
>> It can be broken down to:
>> (A) OR (B) OR (C) OR (D) AND E
>> A, B, C and D are themselves AND boolean clauses.
>> The E clause at the end is not behaving the way I would expect. No matter
>> how I order the A,B,C and D clauses, it always returns the equivalent of
>> ((D) AND E).
>> When I add additional parentheses it behaves the way I expect. Like:
>> ((A) OR (B) OR (C) OR (D)) AND E
>> or
>> (A) OR (B) OR (C) OR ((D) AND E)
>> Can anyone explain why it behaves the way it does without the
>> parentheses?
>> Is there something I am missing in the way it processes boolean clauses?
>> Thanks,
>> Mark
>> -- 
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