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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9688) Support SAMPLE operator in hive
Date Thu, 26 Mar 2015 20:52:53 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9688?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14382643#comment-14382643
] 

Prasanth Jayachandran commented on HIVE-9688:
---------------------------------------------

Hi [~dij] and [~jayapriya90].. Thanks for your interest in working on this project. Unfortunately
this project will not be part of GSoC this year as it will not be much useful for hive. HIVE-9689
will be more useful for hive optimizer to make better decisions for the same cases that SAMPLE
operator serves. If it still interests you please submit for HIVE-9689 project.

> Support SAMPLE operator in hive
> -------------------------------
>
>                 Key: HIVE-9688
>                 URL: https://issues.apache.org/jira/browse/HIVE-9688
>             Project: Hive
>          Issue Type: New Feature
>            Reporter: Prasanth Jayachandran
>              Labels: hive, java
>
> Hive needs SAMPLE operator to support parallel order by, skew joins and count + distinct
optimizations. Random, Reservoir and Stratified sampling should cover most of the cases.



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