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https://issues.apache.org/jira/browse/HIVE-4246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13737951#comment-13737951
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Gunther Hagleitner commented on HIVE-4246:
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[~owen.omalley] looks like you need to update the golden files for most of the
TestParse tests. The "neededColumns" you added to the TableScan show up in all
the serialized queries now.
> Implement predicate pushdown for ORC
> ------------------------------------
>
> Key: HIVE-4246
> URL: https://issues.apache.org/jira/browse/HIVE-4246
> Project: Hive
> Issue Type: New Feature
> Components: File Formats
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Attachments: HIVE-4246.D11415.1.patch, HIVE-4246.D11415.2.patch,
> HIVE-4246.D11415.3.patch, HIVE-4246.D11415.3.patch
>
>
> By using the push down predicates from the table scan operator, ORC can skip
> over 10,000 rows at a time that won't satisfy the predicate. This will help a
> lot, especially if the file is sorted by the column that is used in the
> predicate.
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