[jira] [Moved] (ORC-12) Add max size of column dictionaries to ORC metadata

["Owen O'Malley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ORC-12?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Owen O'Malley moved HIVE-9451 to ORC-12:
----------------------------------------

    Workflow: jira  (was: no-reopen-closed, patch-avail)
         Key: ORC-12  (was: HIVE-9451)
     Project: Orc  (was: Hive)

> Add max size of column dictionaries to ORC metadata
> ---------------------------------------------------
>
>                 Key: ORC-12
>                 URL: https://issues.apache.org/jira/browse/ORC-12
>             Project: Orc
>          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.



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