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https://issues.apache.org/jira/browse/SOLR-2198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Harish Agarwal updated SOLR-2198:
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Attachment: SOLR-2198.patch
I attached a patch which seems to fix the problem for fields using [Int, Long,
Double, Float]FieldSource's. I made the 'exists' property on MutableValue's
public and am using it to denote null values, all the non-grouping tests still
pass.
I'm still having trouble figuring out how to distinguish between a null string
and "" - is this even possible?
It would be good to get some feedback on the patch before I try to extend this
to other field types (like SortableFields).
> Grouping treats null values as equivalent to 0 or an empty string
> -----------------------------------------------------------------
>
> Key: SOLR-2198
> URL: https://issues.apache.org/jira/browse/SOLR-2198
> Project: Solr
> Issue Type: Sub-task
> Reporter: Harish Agarwal
> Attachments: SOLR-2198.patch, SOLR-2198.patch
>
>
> The grouping function does not distinguish between missing values and their
> null type equivalents (0 for numeric types and an empty string for string
> types).
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