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https://issues.apache.org/jira/browse/HIVE-4246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13735498#comment-13735498
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Phabricator commented on HIVE-4246:
-----------------------------------
omalley has commented on the revision "HIVE-4246 [jira] Implement predicate
pushdown for ORC".
INLINE COMMENTS
ql/src/java/org/apache/hadoop/hive/ql/exec/TableScanOperator.java:244 I need
the names, because the SARGs are based on column names instead of ids.
ql/src/java/org/apache/hadoop/hive/ql/io/orc/RecordReaderImpl.java:1483 They
really aren't an enum, they are positions in a number stream.
ql/src/java/org/apache/hadoop/hive/ql/io/sarg/SearchArgument.java:142 +1
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestInStream.java:128 +1
REVISION DETAIL
https://reviews.facebook.net/D11415
To: JIRA, omalley
Cc: hagleitn
> 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
>
>
> 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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