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From "Siying Dong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2121) Input Sampling By Splits
Date Tue, 26 Apr 2011 23:19:03 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Siying Dong updated HIVE-2121:
------------------------------

    Attachment: HIVE-2121.4.patch

remove the switch

> Input Sampling By Splits
> ------------------------
>
>                 Key: HIVE-2121
>                 URL: https://issues.apache.org/jira/browse/HIVE-2121
>             Project: Hive
>          Issue Type: New Feature
>            Reporter: Siying Dong
>            Assignee: Siying Dong
>         Attachments: HIVE-2121.1.patch, HIVE-2121.2.patch, HIVE-2121.3.patch, HIVE-2121.4.patch
>
>
> We need a better input sampling to serve at least two purposes:
> 1. test their queries against a smaller data set
> 2. understand more about how the data look like without scanning the whole table.
> A simple function that gives a subset splits will help in those cases. It doesn't have
to be strict sampling.

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