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https://issues.apache.org/jira/browse/HIVE-9451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley updated HIVE-9451:
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Attachment: HIVE-9451.patch
This patch adds the maxDictionarySize and configured stripe size to the
metadata of ORC files. I'll need to update the expected results for the qfiles
that depend on the size of orc files.
> 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
> Fix For: 1.2.0
>
> Attachments: 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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