hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Damien Carol (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-9451) Add max size of column dictionaries to ORC metadata
Date Wed, 29 Apr 2015 08:26:05 GMT

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

Damien Carol updated HIVE-9451:
-------------------------------
    Labels: ORC  (was: )

> 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
>             Fix For: 1.2.0
>
>         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)

Mime
View raw message