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https://issues.apache.org/jira/browse/SOLR-1871?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Harris updated SOLR-1871:
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Attachment: SOLR-1871.patch
Revised patch, with two changes:
* Now we modify the behavior of "map", rather than introducing a new "mapf"
function.
* Now not only the "target" but also the "defaultValue" can be a ValueSource.
> Function Query "map" variant that allows "target" to be an arbitrary
> ValueSource
> --------------------------------------------------------------------------------
>
> Key: SOLR-1871
> URL: https://issues.apache.org/jira/browse/SOLR-1871
> Project: Solr
> Issue Type: Improvement
> Components: search
> Affects Versions: 1.4
> Reporter: Chris Harris
> Attachments: SOLR-1871.patch, SOLR-1871.patch, SOLR-1871.patch
>
>
> Currently, as documented at http://wiki.apache.org/solr/FunctionQuery#map,
> the "target" of a map must be a floating point constant. I propose that you
> should have at least the option of doing a map where the target is an
> arbitrary ValueSource.
> The particular use case that inspired this is that I want to be able to
> control how missing date fields affected boosting. In particular, I want to
> be able to use something like this in my function queries:
> {code}
> map(mydatefield,0,0,ms(NOW))
> {code}
> But this might have other uses.
> I'll attach an initial implementation.
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