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From "Mostafa Mokhtar (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-10331) ORC : Is null SARG filters out all row groups written in old ORC format
Date Tue, 14 Apr 2015 20:45:59 GMT

     [ https://issues.apache.org/jira/browse/HIVE-10331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mostafa Mokhtar updated HIVE-10331:
-----------------------------------
    Attachment: HIVE-10331.01.patch

> ORC : Is null SARG filters out all row groups written in old ORC format
> -----------------------------------------------------------------------
>
>                 Key: HIVE-10331
>                 URL: https://issues.apache.org/jira/browse/HIVE-10331
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 1.1.0
>            Reporter: Mostafa Mokhtar
>            Assignee: Prasanth Jayachandran
>             Fix For: 1.2.0
>
>         Attachments: HIVE-10331.01.patch
>
>
> Queries are returning wrong results as all row groups gets filtered out and no rows get
scanned.
> {code}
> SELECT 
>   count(*)
>     FROM
>         store_sales
>     WHERE
>         ss_addr_sk IS NULL
> {code}
> With hive.optimize.index.filter disabled we get the correct results
> In pickRowGroups stats show that hasNull_ is fales, while the rowgroup actually has null.
> Same query runs fine for newly loaded ORC tables.



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