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https://issues.apache.org/jira/browse/HIVE-3289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13427049#comment-13427049
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Hudson commented on HIVE-3289:
------------------------------
Integrated in Hive-trunk-h0.21 #1584 (See
[https://builds.apache.org/job/Hive-trunk-h0.21/1584/])
HIVE-3289. sort merge join may not work silently. (njain via kevinwilfong)
(Revision 1368119)
Result = FAILURE
kevinwilfong :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1368119
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/ErrorMsg.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/SortedMergeBucketMapJoinOptimizer.java
* /hive/trunk/ql/src/test/queries/clientnegative/sortmerge_mapjoin_mismatch_1.q
*
/hive/trunk/ql/src/test/results/clientnegative/sortmerge_mapjoin_mismatch_1.q.out
> sort merge join may not work silently
> -------------------------------------
>
> Key: HIVE-3289
> URL: https://issues.apache.org/jira/browse/HIVE-3289
> Project: Hive
> Issue Type: Bug
> Components: Configuration, Query Processor
> Affects Versions: 0.10.0
> Reporter: Namit Jain
> Assignee: Namit Jain
> Fix For: 0.10.0
>
> Attachments: hive.3289.1.patch
>
>
> The user does not know, if the sort-merge join is working or not.
> create table table_asc(key int, value string) CLUSTERED BY (key) SORTED BY
> (key asc)
> INTO 1 BUCKETS STORED AS RCFILE;
> create table table_desc(key int, value string) CLUSTERED BY (key) SORTED BY
> (key desc)
> INTO 1 BUCKETS STORED AS RCFILE;
> set hive.enforce.sorting = true;
> insert overwrite table table_asc select key, value from src;
> insert overwrite table table_desc select key, value from src;
> set hive.optimize.bucketmapjoin = true;
> set hive.optimize.bucketmapjoin.sortedmerge = true;
> set hive.input.format =
> org.apache.hadoop.hive.ql.io.BucketizedHiveInputFormat;
> explain
> select /*+mapjoin(a)*/ * from table_asc a join table_desc b on a.key = b.key;
> select /*+mapjoin(a)*/ * from table_asc a join table_desc b on a.key = b.key;
> explain
> select /*+mapjoin(b)*/ * from table_asc a join table_desc b on a.key = b.key;
> select /*+mapjoin(b)*/ * from table_asc a join table_desc b on a.key = b.key;
> In the above test, the sort-merge join is not obeyed as expected.
> If you user explicitly asked for sort-merge join, and it is not being
> obeyed, the operation should fail.
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