[jira] Commented: (SOLR-2198) Grouping treats null values as equivalent to 0 or an empty string

["Harish Agarwal (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-2198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924988#action_12924988 ] 

Harish Agarwal commented on SOLR-2198:
--------------------------------------

A related and relevant issue is figuring out how to denote null values in the 'groupValue' field.  Its still useful to group missing values together.

> 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
>
>
> 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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