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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3432) perform a map-only group by if grouping key matches the sorting properties of the table
Date Sat, 29 Sep 2012 03:03:07 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13466089#comment-13466089
] 

Hudson commented on HIVE-3432:
------------------------------

Integrated in Hive-trunk-h0.21 #1707 (See [https://builds.apache.org/job/Hive-trunk-h0.21/1707/])
    HIVE-3432. perform a map-only group by if grouping key matches the sorting properties
of the table. (njain via kevinwilfong) (Revision 1391608)

     Result = SUCCESS
kevinwilfong : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1391608
Files : 
* /hive/trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
* /hive/trunk/conf/hive-default.xml.template
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/ExecDriver.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/FilterOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/GroupByOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/Operator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/SelectOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMapRedUtils.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GroupByOptimizer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/Optimizer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/GroupByDesc.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/MapredWork.java
* /hive/trunk/ql/src/test/queries/clientpositive/groupby_sort_1.q
* /hive/trunk/ql/src/test/queries/clientpositive/groupby_sort_skew_1.q
* /hive/trunk/ql/src/test/results/clientpositive/bucket_groupby.q.out
* /hive/trunk/ql/src/test/results/clientpositive/groupby_sort_1.q.out
* /hive/trunk/ql/src/test/results/clientpositive/groupby_sort_skew_1.q.out
* /hive/trunk/ql/src/test/results/clientpositive/metadataonly1.q.out
* /hive/trunk/ql/src/test/results/clientpositive/ql_rewrite_gbtoidx.q.out

                
> perform a map-only group by if grouping key matches the sorting properties of the table
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-3432
>                 URL: https://issues.apache.org/jira/browse/HIVE-3432
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>             Fix For: 0.10.0
>
>         Attachments: hive.3432.1.patch, hive.3432.2.patch, hive.3432.3.patch, hive.3432.4.patch,
hive.3432.5.patch, hive.3432.6.patch, hive.3432.7.patch, hive.3432.8.patch
>
>
> There should be an option to use bucketizedinputformat and use map-only group by. There
would be no need to perform a map-side aggregation.

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