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https://issues.apache.org/jira/browse/HIVE-2329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13166881#comment-13166881
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Hudson commented on HIVE-2329:
------------------------------
Integrated in Hive-trunk-h0.21 #1137 (See
[https://builds.apache.org/job/Hive-trunk-h0.21/1137/])
HIVE-2329 Not using map aggregation, fails to execute group-by after
cluster-by with same key (Navis via namit)
namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1212551
Files :
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/ReduceSinkDeDuplication.java
*
/hive/trunk/ql/src/test/queries/clientpositive/reduce_deduplicate_exclude_gby.q
*
/hive/trunk/ql/src/test/results/clientpositive/reduce_deduplicate_exclude_gby.q.out
> Not using map aggregation, fails to execute group-by after cluster-by with
> same key
> -----------------------------------------------------------------------------------
>
> Key: HIVE-2329
> URL: https://issues.apache.org/jira/browse/HIVE-2329
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Minor
> Fix For: 0.9.0
>
> Attachments: HIVE-2329.1.patch.txt, HIVE-2329.D657.1.patch
>
>
> hive.map.aggr=false
> select Q1.key_int1, sum(Q1.key_int1), sum(distinct Q1.key_int1) from (select
> * from t1 cluster by key_int1) Q1 group by Q1.key_int1
> resulted..
> FAILED: Execution Error, return code 2 from
> org.apache.hadoop.hive.ql.exec.MapRedTask
> from hadoop logs..
> Caused by: java.lang.RuntimeException: cannot find field key from []
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.getStandardStructFieldRef(ObjectInspectorUtils.java:321)
> at
> org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector.getStructFieldRef(StandardStructObjectInspector.java:119)
> at
> org.apache.hadoop.hive.ql.exec.ExprNodeColumnEvaluator.initialize(ExprNodeColumnEvaluator.java:82)
> at
> org.apache.hadoop.hive.ql.exec.GroupByOperator.initializeOp(GroupByOperator.java:198)
> at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:357)
> at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:433)
> ........
> I think the problem is caused by ReduceSinkDeDuplication, removing RS which
> was providing rs.key for GBY operation. If child of child RS is a GBY, we
> should bypass the optimization.
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