hive-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-3892) auto sort merge join does not work for sub-queries
Date Thu, 07 Feb 2013 06:53:14 GMT

     [ https://issues.apache.org/jira/browse/HIVE-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Namit Jain updated HIVE-3892:
-----------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Will be fixed as part of HIVE-3403
                
> auto sort merge join does not work for sub-queries
> --------------------------------------------------
>
>                 Key: HIVE-3892
>                 URL: https://issues.apache.org/jira/browse/HIVE-3892
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>
> set hive.enforce.bucketing = true;
> set hive.enforce.sorting = true;
> set hive.exec.reducers.max = 1;
> CREATE TABLE tbl1(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS;
> CREATE TABLE tbl2(key int, value string) CLUSTERED BY (key) SORTED BY (key) INTO 2 BUCKETS;
> insert overwrite table tbl1
> select * from src where key < 10;
> insert overwrite table tbl2
> select * from src where key < 10;
> set hive.auto.sort.merge.join=true;
> set hive.optimize.bucketmapjoin = true;
> set hive.optimize.bucketmapjoin.sortedmerge = true;
> set hive.auto.sort.merge.join.bigtbl.matcher = org.apache.hadoop.hive.ql.optimizer.SizeSortMergeJoinBigTableMatcher;
> -- The join is being performed in sub-query. It should be converted to a sort-merge join
> explain
> select count(*) from (
>   select a.key as key, a.value as val1, b.value as val2 from tbl1 a join tbl2 b on a.key
= b.key
> ) subq1;
> Even after HIVE-3403, the test above does not convert to a sort-merge join.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message