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https://issues.apache.org/jira/browse/SOLR-5335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13791690#comment-13791690
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Hoss Man commented on SOLR-5335:
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Doesn't this already exist?
https://wiki.apache.org/solr/FunctionQuery#def
> Add support for "default" operator
> ----------------------------------
>
> Key: SOLR-5335
> URL: https://issues.apache.org/jira/browse/SOLR-5335
> Project: Solr
> Issue Type: Sub-task
> Reporter: Steven Bower
>
> In cases where a value is missing it expressions just simply don't return a
> value and are considered "missing".. eg add( fieldA, fieldB) if fieldB
> doesn't exist in a doc the "add" is considered missing. Would be nice to have
> a "default" operator to handle edge cases.. eg add( fieldA, default( fieldB,
> 0 )) such that the value 0 will be used instead of a "missing" value..
> This could also handle the div by zero case too
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