FW: Boosting with 0 factor

-----Original Message-----
From: Emir Arnautović [mailto:emir.arnautovic@sematext.com]
Sent: 14 March 2018 14:09
To: solr-user@lucene.apache.org
Subject: Re: Boosting with 0 factor

Hi Dariusz,
It will match but it will not affect the score. If you have a single field
boosted with 0, score will be 0. You can use debugQuery=true to see how
query is parsed and see that there is a component even boost is 0.

HTH,
Emir
--
Monitoring - Log Management - Alerting - Anomaly Detection Solr &
Elasticsearch Consulting Support Training - http://sematext.com/



> On 13 Mar 2018, at 17:28, Dariusz Wojtas <dwojtas@gmail.com> wrote:
>
> Hi,
>
> I have a question about boosting queries with ^0
>
> I am using LTR. In the 1st step I want to narrow the query, but limit
> 'noise' results as much as possible. The 1st step is defined as follows:
> <str name="q">{!edismax qf='keyword_id^10 keyword_nonid^2
> keyword_lastNames^2 keyword_names^1' v=$searchedTerms}</str>
>
> And I have lots of such boosted fields, but want to narrow them
dynamically.
> I may pass boost factors as local params, with ${boostVal}. This part
works.
> If I set boost to 0, as in the example below for field 'keyword_id',
> will it execute query on that field or skip it since boost of factor 0
> will boost the result?
> In short: will it bring performance savings, or not?
>
> <str name="q">{!edismax qf='keyword_id^0 keyword_nonid^2
> keyword_lastNames^2 keyword_names^1' v=$searchedTerms}</str>
>
>
> Best regards,
> Dariusz Wojtas