hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-12309) TableScan should colStats when available for better data size estimate
Date Fri, 30 Oct 2015 22:06:27 GMT

     [ https://issues.apache.org/jira/browse/HIVE-12309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashutosh Chauhan updated HIVE-12309:
------------------------------------
    Attachment: HIVE-12309.patch

> TableScan should colStats when available for better data size estimate
> ----------------------------------------------------------------------
>
>                 Key: HIVE-12309
>                 URL: https://issues.apache.org/jira/browse/HIVE-12309
>             Project: Hive
>          Issue Type: Improvement
>          Components: Statistics
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>         Attachments: HIVE-12309.patch
>
>
> Currently, all other operators use column stats to figure out data size, whereas TableScan
relies on rawDataSize. This inconsistency can result in an inconsistency where TS may have
lower Datasize then subsequent operators.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message