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https://issues.apache.org/jira/browse/PHOENIX-3158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15410759#comment-15410759
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James Taylor commented on PHOENIX-3158:
---------------------------------------
Might be worth looking for all occurrences of groupBy.isEmpty() to see if there
are any other adjustments like this to be made.
> COUNT(DISTINCT) may return null instead of 0 after PHOENIX-258
> --------------------------------------------------------------
>
> Key: PHOENIX-3158
> URL: https://issues.apache.org/jira/browse/PHOENIX-3158
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Lars Hofhansl
> Fix For: 4.8.1
>
> Attachments: 3158-fix.txt, 3158.txt
>
>
> This is fine to fix in 4.8.1.
> I'll attach a test to indicate the issue.
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