Thank you Walter. I liked your solution! This is what I was looking for i.e.
&boost=log(sum(1,qty))
O. O.
Walter Underwood wrote
> The usual fix for this is log(1+qty). If you might have negative values,
> you can use log(max(1,qty)).
>
> wunder
> Walter Underwood
> wunder@
> http://observer.wunderwood.org/
>
> On Oct 20, 2014, at 3:04 PM, O. Olson <
> olson_ord@
> > wrote:
>
>> I am considering using a boost as follows:
>>
>> &boost=log(qty)
>>
>> Where qty is the quantity in stock of a given product i.e. qty could be
>> 0,
>> 1, 2, 3, … etc. The problem I see is that log(0) is Infinity. Would this
>> be
>> a problem for Solr? For me it is not a problem because
>> log(0) < log(1) < log(2) etc.
>>
>> I'd be grateful for any thoughts. One alternative is to use max e.g.
>> &boost=max(log(qty), 1)
>>
>> But still this would cause Solr to compute the Infinity and then discard
>> it. So can I use an expression for boost that would result in –Infinity?
>>
>> Thank you
>> O. O.
>>

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