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From "Mostafa Mokhtar (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-8316) CBO : cardinality estimation for filters is much lower than actual row count
Date Tue, 30 Sep 2014 22:04:34 GMT

     [ https://issues.apache.org/jira/browse/HIVE-8316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mostafa Mokhtar updated HIVE-8316:
----------------------------------
    Summary: CBO : cardinality estimation for filters is much lower than actual row count
 (was: CBO : cardinality estimation for filters under estimates is much lower than actual
row count)

> CBO : cardinality estimation for filters is much lower than actual row count
> ----------------------------------------------------------------------------
>
>                 Key: HIVE-8316
>                 URL: https://issues.apache.org/jira/browse/HIVE-8316
>             Project: Hive
>          Issue Type: Bug
>          Components: CBO
>    Affects Versions: 0.14.0
>            Reporter: Mostafa Mokhtar
>            Assignee: Harish Butani
>             Fix For: 0.14.0
>
>
> CBO underestimates selectivity from filter which consequently results in under estimation
throughout the plan.
> {code}
> {code}



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