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https://issues.apache.org/jira/browse/PHOENIX-1476?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Taylor updated PHOENIX-1476:
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Attachment: PHOENIX-1476.patch
[~mujtaba] - please try this patch and let me know if GROUP BY is better again.
> Immediately open scanner for parallel queries
> ---------------------------------------------
>
> Key: PHOENIX-1476
> URL: https://issues.apache.org/jira/browse/PHOENIX-1476
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Attachments: PHOENIX-1476.patch
>
>
> Seems like there may be a performance degradation of waiting to open the
> scanner for parallel queries. In particular GROUP BY queries.
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