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From André Warnier>
Subject Re: Boolean query with 50,000 clauses! Possible? Scalable?
Date Wed, 29 Jul 2009 23:38:12 GMT
Uwe Schindler wrote:
>>> If so, how does Lucene handle the case where a book has several authors,
>>> each with a name, a weight, etc..
>>> How does one keep them "in sync", so that if I search for books that
>>> have an author with first name "Robert" and who weighs more than 100 Kg,
>>> I do not hit the ones that have a combination like this :
>>> author #1 : Einstein, Albert, 101 Kg
>>> author #2 : McNamara, Robert, 075 Kg
>> This is not so simple using this approach. You can only do it with one
>> combined field containing the author and weight, but then you cannot use
>> NumericRangeQuery and must write more complicated queries by adding a
>> PositionIncrement/Offset to the terms created and correlate the author and
>> weight using this in a SpanQuery.
> In general you should be able to do this with SpanQueries if you correlate
> the weight and names using offsets or positions.
> But you must think about it longer, but it should work.
>> But I understood the question different:
>> "I want a
>> query that gives every book document authored by people weighing more than
>> 200lbs, with the ability of doing faceting and the likes."
>> In this case it is irrelevant which author weights the 200 lbs, there must
>> be only one, so a NumericRange line
>> NumericRangeQuery.newFloatRange(field,200.0f,null,true,true) would do it.
Thanks, for the answer and for your time.
That is about what I understood from the documentation, but I wasn't 
sure.  I will now stop interrupting.

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