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https://issues.apache.org/jira/browse/HIVE-2282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13069611#comment-13069611
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Siying Dong commented on HIVE-2282:
-----------------------------------
Also, query like "select key, value from sih_src tablesample(1 percent)"
actually doesn't generate stable result. You can use select count(1) instead.
That will generate correct results.
> Local mode needs to work well with block sampling
> -------------------------------------------------
>
> Key: HIVE-2282
> URL: https://issues.apache.org/jira/browse/HIVE-2282
> Project: Hive
> Issue Type: Improvement
> Reporter: Siying Dong
> Assignee: Kevin Wilfong
> Attachments: HIVE-2282.1.patch.txt, HIVE-2282.2.patch.txt,
> HIVE-2282.3.patch.txt
>
>
> Currently, if block sampling is enabled and large set of data are sampled to
> a small set, local mode needs to be kicked in.
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