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Posted to dev@phoenix.apache.org by "hanzhi (JIRA)" <ji...@apache.org> on 2017/09/03 09:16:02 UTC

[jira] [Commented] (PHOENIX-153) Implement TABLESAMPLE clause

    [ https://issues.apache.org/jira/browse/PHOENIX-153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16151751#comment-16151751 ] 

hanzhi commented on PHOENIX-153:
--------------------------------

Awesome!!!!!!

> Implement TABLESAMPLE clause
> ----------------------------
>
>                 Key: PHOENIX-153
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-153
>             Project: Phoenix
>          Issue Type: Task
>            Reporter: James Taylor
>            Assignee: Ethan Wang
>              Labels: enhancement
>             Fix For: 4.12.0
>
>         Attachments: Sampling_Accuracy_Performance.jpg
>
>
> Support the standard SQL TABLESAMPLE clause by implementing a filter that uses a skip next hint based on the region boundaries of the table to only return n rows per region.
> [Update]
> Source Code Patch: 
> https://git-wip-us.apache.org/repos/asf?p=phoenix.git;a=commitdiff;h=5e33dc12bc088bd0008d89f0a5cd7d5c368efa25



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