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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2019/07/03 15:56:00 UTC

[jira] [Updated] (HIVE-21928) Fix for statistics annotation in nested AND expressions

     [ https://issues.apache.org/jira/browse/HIVE-21928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jesus Camacho Rodriguez updated HIVE-21928:
-------------------------------------------
    Status: Patch Available  (was: In Progress)

> Fix for statistics annotation in nested AND expressions
> -------------------------------------------------------
>
>                 Key: HIVE-21928
>                 URL: https://issues.apache.org/jira/browse/HIVE-21928
>             Project: Hive
>          Issue Type: Bug
>          Components: Physical Optimizer
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Critical
>         Attachments: HIVE-21928.patch
>
>
> Discovered while working on HIVE-21867. Having predicates with nested AND expressions may result in different stats, even if predicates are basically similar (from stats estimation standpoint).
> For instance, stats for {{AND(x=5, true, true)}} are different from {{x=5}}.



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