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Posted to dev@hive.apache.org by "Mostafa Mokhtar (JIRA)" <ji...@apache.org> on 2014/10/01 00:04:34 UTC
[jira] [Updated] (HIVE-8316) CBO : cardinality estimation for
filters under estimates is much lower than actual row count
[ https://issues.apache.org/jira/browse/HIVE-8316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mostafa Mokhtar updated HIVE-8316:
----------------------------------
Description:
CBO underestimates selectivity from filter which consequently results in under estimation throughout the plan.
{code}
{code}
was:CBO underestimates selectivity
> CBO : cardinality estimation for filters under estimates 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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