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https://issues.apache.org/jira/browse/HIVE-29556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HIVE-29556:
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Labels: pull-request-available (was: )
> StatsUtils::extractNDVGroupingColumns() adjust "unknown" NDVs of "0" to "1"
> ---------------------------------------------------------------------------
>
> Key: HIVE-29556
> URL: https://issues.apache.org/jira/browse/HIVE-29556
> Project: Hive
> Issue Type: Bug
> Reporter: Konstantin Bereznyakov
> Priority: Major
> Labels: pull-request-available
>
> The side effect of this is a potentially severe under-estimation of the
> number of GROUP BY result rows
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