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https://issues.apache.org/jira/browse/HIVE-2056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13031684#comment-13031684
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jirapos...@reviews.apache.org commented on HIVE-2056:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/700/
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(Updated 2011-05-11 13:14:36.754720)
Review request for hive.
Changes
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Updated the patch to do prefix matching and added a testcase.
Summary
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Attached patch generates a single M/R job for multi group by query with
non-null common group by key set. Added configuration
hive.multigroupby.singlemr to turn on and off the optimization.
This addresses bug HIVE-2056.
https://issues.apache.org/jira/browse/HIVE-2056
Diffs (updated)
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trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java 1100910
trunk/conf/hive-default.xml 1100910
trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
1100910
trunk/ql/src/test/queries/clientpositive/groupby10.q 1100910
trunk/ql/src/test/queries/clientpositive/groupby8.q 1100910
trunk/ql/src/test/queries/clientpositive/groupby8_noskew.q 1100910
trunk/ql/src/test/queries/clientpositive/groupby9.q 1100910
trunk/ql/src/test/queries/clientpositive/multigroupby_singlemr.q PRE-CREATION
trunk/ql/src/test/results/clientpositive/groupby10.q.out 1100910
trunk/ql/src/test/results/clientpositive/groupby8.q.out 1100910
trunk/ql/src/test/results/clientpositive/groupby9.q.out 1100910
trunk/ql/src/test/results/clientpositive/multigroupby_singlemr.q.out
PRE-CREATION
Diff: https://reviews.apache.org/r/700/diff
Testing (updated)
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Updated jira with performance tests.
All unit tests passed with the patch
Thanks,
Amareshwari
> Generate single MR job for multi groupby query.
> -----------------------------------------------
>
> Key: HIVE-2056
> URL: https://issues.apache.org/jira/browse/HIVE-2056
> Project: Hive
> Issue Type: Improvement
> Reporter: Amareshwari Sriramadasu
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.8.0
>
> Attachments: patch-2056-1.txt, patch-2056-2.txt, patch-2056.txt
>
>
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