You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@hive.apache.org by "Sushanth Sowmyan (JIRA)" <ji...@apache.org> on 2015/05/09 01:40:02 UTC

[jira] [Updated] (HIVE-9451) Add max size of column dictionaries to ORC metadata

     [ https://issues.apache.org/jira/browse/HIVE-9451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sushanth Sowmyan updated HIVE-9451:
-----------------------------------
    Fix Version/s:     (was: 1.2.0)

> Add max size of column dictionaries to ORC metadata
> ---------------------------------------------------
>
>                 Key: HIVE-9451
>                 URL: https://issues.apache.org/jira/browse/HIVE-9451
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>              Labels: ORC
>         Attachments: HIVE-9451.patch, HIVE-9451.patch
>
>
> To predict the amount of memory required to read an ORC file we need to know the size of the dictionaries for the columns that we are reading. I propose adding the number of bytes for each column's dictionary to the stripe's column statistics. The file's column statistics would have the maximum dictionary size for each column.



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