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https://issues.apache.org/jira/browse/SOLR-349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12525945
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Yonik Seeley commented on SOLR-349:
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Yes, I suppose that sum() makes more sense... and ValueSources are so light
weight it shouldn't really cause a performance difference. Although I think
perhaps a constant should be allowed in sum(), otherwise people will be trying
the very reasonable sum(a,1) and it won't work. Of course we could make a
ConstantValueSource, so constants and value-sources would be interchangeable...
For "mult", I was thinking "product".
Also perhaps a map() to pseudo-handle default values.
product(x, map(y,0,1)) // map all zeros to 1 before multiplying
> boost query by a function of other fields
> -----------------------------------------
>
> Key: SOLR-349
> URL: https://issues.apache.org/jira/browse/SOLR-349
> Project: Solr
> Issue Type: New Feature
> Reporter: Yonik Seeley
> Attachments: linear_combination.patch
>
>
> User should be able to boost a query by a function of other fields
> Some background:
> http://www.nabble.com/boosting-a-query-by-a-function-of-other-fields-tf4387856.html#a12510092
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