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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (PHOENIX-2818) Optimize ORDERED group by
Date Fri, 13 May 2016 00:29:12 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-2818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Taylor resolved PHOENIX-2818.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 4.8.0

> Optimize ORDERED group by
> -------------------------
>
>                 Key: PHOENIX-2818
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2818
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: James Taylor
>            Assignee: James Taylor
>             Fix For: 4.8.0
>
>         Attachments: PHOENIX-2818.patch
>
>
> We currently check each row against the previous row when we execute a GROUP BY in row
key order. We only need to check the previous row at the boundary while it's the same as the
first row(s) in the next scan, kind of a hybrid between the ConcatResultIterator and the GroupedResultIterator.



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