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https://issues.apache.org/jira/browse/PHOENIX-3050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16369032#comment-16369032
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Rajeshbabu Chintaguntla commented on PHOENIX-3050:
--------------------------------------------------

[~maryannxue] This is missing in 5.x branch. Can you please commit it to the 
branch as well. Thanks.

> Handle DESC columns in child/parent join optimization
> -----------------------------------------------------
>
>                 Key: PHOENIX-3050
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3050
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.8.0
>            Reporter: Maryann Xue
>            Assignee: Maryann Xue
>            Priority: Minor
>             Fix For: 4.14.0
>
>         Attachments: PHOENIX-3050.patch
>
>
> We found that child/parent join optimization would not work with DESC pk 
> columns. So as a quick fix for PHOENIX-3029, we simply avoid DESC columns 
> when optimizing, which would have no impact on the overall approach and no 
> impact on ASC columns.
>  
> But eventually we need to make the optimization work with DESC columns too.



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