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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3171) Bucketed sort merge join doesn't work when multiple files exist for small alias
Date Wed, 09 Jan 2013 10:26:16 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13547958#comment-13547958
] 

Hudson commented on HIVE-3171:
------------------------------

Integrated in Hive-trunk-hadoop2 #54 (See [https://builds.apache.org/job/Hive-trunk-hadoop2/54/])
    HIVE-3171. Bucketed sort merge join doesn't work when multiple files exist for small alias
(Navis Ryu via cws) (Revision 1382098)

     Result = ABORTED
cws : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1382098
Files : 
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/ExecMapperContext.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/FetchOperator.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/SMBMapJoinOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/SortedMergeBucketMapJoinOptimizer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/FetchWork.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/util/ObjectPair.java
* /hive/trunk/ql/src/test/queries/clientpositive/bucketcontext_1.q
* /hive/trunk/ql/src/test/queries/clientpositive/bucketcontext_2.q
* /hive/trunk/ql/src/test/queries/clientpositive/bucketcontext_3.q
* /hive/trunk/ql/src/test/queries/clientpositive/bucketcontext_4.q
* /hive/trunk/ql/src/test/queries/clientpositive/bucketcontext_5.q
* /hive/trunk/ql/src/test/queries/clientpositive/bucketcontext_6.q
* /hive/trunk/ql/src/test/results/clientpositive/bucketcontext_2.q.out
* /hive/trunk/ql/src/test/results/clientpositive/bucketcontext_3.q.out
* /hive/trunk/ql/src/test/results/clientpositive/bucketcontext_4.q.out
* /hive/trunk/ql/src/test/results/clientpositive/bucketcontext_5.q.out
* /hive/trunk/ql/src/test/results/clientpositive/bucketcontext_6.q.out
* /hive/trunk/serde/src/java/org/apache/hadoop/hive/serde2/ColumnProjectionUtils.java

                
> Bucketed sort merge join doesn't work when multiple files exist for small alias
> -------------------------------------------------------------------------------
>
>                 Key: HIVE-3171
>                 URL: https://issues.apache.org/jira/browse/HIVE-3171
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.10.0
>            Reporter: Joey Echeverria
>            Assignee: Navis
>              Labels: bucketing, joins, partitioning
>             Fix For: 0.10.0
>
>         Attachments: HIVE-3171.1.patch.txt, HIVE-3171.2.patch.txt
>
>
> Executing a query with the MAPJOIN hint and the bucketed sort merge join optimizations
enabled:
> {noformat}
> set hive.input.format=org.apache.hadoop.hive.ql.io.BucketizedHiveInputFormat;
> set hive.optimize.bucketmapjoin = true;
> set hive.optimize.bucketmapjoin.sortedmerge = true;
> {noformat}
> works fine with partitioned tables if there is only one partition in the table. However,
if you add a second partition, Hive attempts to do a regular map-side join which can fail
because the tables are too large. Hive ought to be able to still do the bucketed sort merge
join with partitions.

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