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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-2198) Grouping treats null values as equivalent to 0 or an empty string
Date Tue, 26 Oct 2010 20:32:19 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925122#action_12925122
] 

Yonik Seeley commented on SOLR-2198:
------------------------------------

Yep, this is currently expected.

Now that all fields can tell if there was a value or not for a given doc, we should update
function query, and mutable value to reflect this.

bq. 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. 

groupValue=null

> 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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