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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3633) sort-merge join does not work with sub-queries
Date Wed, 09 Jan 2013 10:32:18 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13548340#comment-13548340
] 

Hudson commented on HIVE-3633:
------------------------------

Integrated in Hive-trunk-hadoop2 #54 (See [https://builds.apache.org/job/Hive-trunk-hadoop2/54/])
    HIVE-3633. sort-merge join does not work with sub-queries. (njain via kevinwilfong) (Revision
1423731)

     Result = ABORTED
kevinwilfong : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1423731
Files : 
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/DummyStoreOperator.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/OperatorFactory.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/AbstractBucketJoinProc.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/BucketMapJoinOptimizer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/SortedMergeBucketMapJoinOptimizer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/QB.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/QBJoinTree.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/TableAccessAnalyzer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/DummyStoreDesc.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/SMBJoinDesc.java
* /hive/trunk/ql/src/test/queries/clientpositive/smb_mapjoin_14.q
* /hive/trunk/ql/src/test/results/clientpositive/smb_mapjoin_14.q.out

                
> sort-merge join does not work with sub-queries
> ----------------------------------------------
>
>                 Key: HIVE-3633
>                 URL: https://issues.apache.org/jira/browse/HIVE-3633
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>             Fix For: 0.11.0
>
>         Attachments: hive.3633.10.patch, hive.3633.11.patch, hive.3633.1.patch, hive.3633.2.patch,
hive.3633.3.patch, hive.3633.4.patch, hive.3633.5.patch, hive.3633.6.patch, hive.3633.7.patch,
hive.3633.8.patch, hive.3633.9.patch
>
>
> Consider the following query:
> create table smb_bucket_1(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO
6 BUCKETS STORED AS TEXTFILE;
> create table smb_bucket_2(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO
6 BUCKETS STORED AS TEXTFILE;
> -- load the above tables
> set hive.optimize.bucketmapjoin = true;
> set hive.optimize.bucketmapjoin.sortedmerge = true;
> set hive.input.format = org.apache.hadoop.hive.ql.io.BucketizedHiveInputFormat;
> explain
> select count(*) from
> (
> select /*+mapjoin(a)*/ a.key as key1, b.key as key2, a.value as value1, b.value as value2
> from smb_bucket_1 a join smb_bucket_2 b on a.key = b.key)
> subq;
> The above query does not use sort-merge join. This would be very useful as we automatically
convert the queries to use sorting and bucketing properties for join.

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