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From Jigar Shah <jigaronl...@gmail.com>
Subject Re: NOT Operator with Parenthesis
Date Tue, 27 Oct 2015 18:35:47 GMT
Most probably LUCENE-6249
<https://issues.apache.org/jira/browse/LUCENE-6249> changes parser's
behavior, for your case.


<https://issues.apache.org/jira/browse/LUCENE-6249>


On Tue, Oct 27, 2015 at 5:33 AM, patel mrugesh <patelmrugesh1@yahoo.co.in>
wrote:

> Thanks for your reply Erick,
> I have gone through the document provided by you.
> However what I have observed is that there is difference if we parse query
> with Lucene 4.10.3 and Lucene 5.2.0 onwards.
> For example :Query String: lottery AND (NOT ticket)Lucene 4.x parsed it
> as: +lottery +ticket
> Lucene 5.1.x parsed it as: +lottery +(-ticket)
> And I want result as 5.1.x produces. But as I am not planning to upgrade
> lucene now so looking for fix for lucene 4.10.x.
> Please could you help on this?
> Thanks,Mrugesh
>
>
>
>      On Monday, 26 October 2015 8:03 PM, Erick Erickson <
> erickerickson@gmail.com> wrote:
>
>
>  Solr does not do strict Boolean logic, although it comes close. See:
> https://lucidworks.com/blog/2011/12/28/why-not-and-or-and-not/
>
> Best,
> Erick
>
> On Sun, Oct 25, 2015 at 11:18 PM, patel mrugesh
> <patelmrugesh1@yahoo.co.in> wrote:
> >  Hi All,
> > We are using Lucene 4.10.3, one strange behavior we have observed when
> NOT operator is used with parenthesis around.
> > It looks like NOT operator is completely ignored and whatever boolean
> operator was before parenthesis is applied.
> > For example, document text: "lottery ticket", query: "lottery NOT
> ticket". As expected, this query will not produce a match for this
> document. However, if this query is slightly modified and converted to
> "lottery (NOT ticket)" or "lottery AND (NOT ticket)" then match is
> produced. It behaves as if query becomes "lottery AND ticket" instead,
> completely ignoring NOT.
> > Please somebody can shed light on this?
> > Thanks,Mrugesh
> >
> >
> >
>
>
>

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