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https://issues.apache.org/jira/browse/HIVE-2340?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phabricator updated HIVE-2340:
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Attachment: HIVE-2340.D1209.2.patch
navis updated the revision "HIVE-2340 [jira] optimize orderby followed by a
groupby".
Reviewers: JIRA
Fixed failure of join18.q (was RS-GBY-RS-JOIN case).
Also implemented JOIN-GBY optimizer with map aggregation which improved
performace for TPC-H Q13 slightly.
REVISION DETAIL
https://reviews.facebook.net/D1209
AFFECTED FILES
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ColumnPrunerProcFactory.java
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ReduceSinkDeDuplication.java
ql/src/test/queries/clientpositive/reduce_deduplicate_extended.q
ql/src/test/results/clientpositive/reduce_deduplicate_extended.q.out
> optimize orderby followed by a groupby
> --------------------------------------
>
> Key: HIVE-2340
> URL: https://issues.apache.org/jira/browse/HIVE-2340
> Project: Hive
> Issue Type: Sub-task
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Minor
> Attachments: HIVE-2340.1.patch.txt, HIVE-2340.D1209.1.patch,
> HIVE-2340.D1209.2.patch
>
>
> Before implementing optimizer for JOIN-GBY, try to implement RS-GBY
> optimizer(cluster-by following group-by).
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