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From "Erick Erickson" <erickerick...@gmail.com>
Subject Re: unexpected query results (AND and OR)
Date Fri, 04 Apr 2008 13:47:09 GMT
I believe you must capitalize the AND. lower-case 'and' is ignored.

you could also construct your own BoolenQuery if you wanted.

I recommend  copy of Luke to interactively examine how queries
are parsed. Also, toString is your friend....

Best
Erick



On Fri, Apr 4, 2008 at 9:41 AM, Jamie <jamie@stimulussoft.com> wrote:

> Hi there
>
> I need some help in understanding Lucene's query mechanism. I am receiving
> unexpected query results when combining terms with AND and OR operators. We
> are using Lucene to index emails. Our problem is that when we execute a
> search such as '(from:"john@sun.com") and (to:"tim@aol.com")' we are
> receiving results that do not contain both john@sun.com and tim@aol.com.
> i.e. There are some results containing only john@sun.com or tim@aol.com.
> The AND operator does not appear to work as expected by requiring both terms
> to appear in the document. We thought about using the lucene score value to
> filter exact matches out but we cannot do this as documents with even scores
> around 70% are applicable. Are we using Lucene in the wrong way? Is there
> something that we are missing?
>
> Thanks in advance
> Jamie
>
>
>
>
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