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https://issues.apache.org/jira/browse/HIVE-2466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13146227#comment-13146227
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Hudson commented on HIVE-2466:
------------------------------
Integrated in Hive-trunk-h0.21 #1067 (See
[https://builds.apache.org/job/Hive-trunk-h0.21/1067/])
HIVE-2466 mapjoin_subquery dump small table (mapjoin table) to the same file
(binlijin via namit)
namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1199117
Files :
* /hive/trunk/data/files/x.txt
* /hive/trunk/data/files/y.txt
* /hive/trunk/data/files/z.txt
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/HashTableSinkOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/MapJoinOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/MapredLocalTask.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/MapJoinProcessor.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/GenMRSkewJoinProcessor.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/HashTableSinkDesc.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/MapJoinDesc.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/PlanUtils.java
* /hive/trunk/ql/src/test/queries/clientpositive/mapjoin_subquery2.q
* /hive/trunk/ql/src/test/results/clientpositive/mapjoin_subquery2.q.out
> mapjoin_subquery dump small table (mapjoin table) to the same file
> -------------------------------------------------------------------
>
> Key: HIVE-2466
> URL: https://issues.apache.org/jira/browse/HIVE-2466
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.7.1
> Reporter: binlijin
> Assignee: binlijin
> Priority: Critical
> Attachments: D285.1.patch, D285.2.patch, hive-2466.1.patch,
> hive-2466.2.patch, hive-2466.3.patch, hive-2466.4.patch
>
>
> in mapjoin_subquery.q there is a query：
> SELECT /*+ MAPJOIN(z) */ subq.key1, z.value
> FROM
> (SELECT /*+ MAPJOIN(x) */ x.key as key1, x.value as value1, y.key as key2,
> y.value as value2
> FROM src1 x JOIN src y ON (x.key = y.key)) subq
> JOIN srcpart z ON (subq.key1 = z.key and z.ds='2008-04-08' and z.hr=11);
> when dump x and z to a local file,there all dump to the same file, so we lost
> the data of x
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