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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3824) bug if different serdes are used for different partitions
Date Mon, 14 Jan 2013 09:12:13 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13552523#comment-13552523
] 

Ashutosh Chauhan commented on HIVE-3824:
----------------------------------------

Cool. Please go ahead for commit.
                
> bug if different serdes are used for different partitions
> ---------------------------------------------------------
>
>                 Key: HIVE-3824
>                 URL: https://issues.apache.org/jira/browse/HIVE-3824
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>         Attachments: hive.3824.1.patch, hive.3824.3.patch, hive.3824.4.patch
>
>
> Consider the following testcase:
> create table tst5 (key string, value string) partitioned by (ds string) stored as rcfile;
> insert overwrite table tst5 partition (ds='1') select * from src;    
> insert overwrite table tst5 partition (ds='2') select * from src;    
> insert overwrite table tst5 partition (ds='3') select * from src;    
> alter table tst5 stored as sequencefile; 
> insert overwrite table tst5 partition (ds='4') select * from src;    
> insert overwrite table tst5 partition (ds='5') select * from src;    
> insert overwrite table tst5 partition (ds='6') select * from src;  
> alter table tst5 set serde 'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'; 
> insert overwrite table tst5 partition (ds='7') select * from src;    
> insert overwrite table tst5 partition (ds='8') select * from src;    
> insert overwrite table tst5 partition (ds='9') select * from src;  
> The following query works fine:
>  select key + key, value from tst5 where ((ds = '4') or (ds = '1'));   
> since both the partitions use ColumnarSerDe
> But the following query fails:
> select key + key, value from tst5 where ((ds = '4') or (ds = '1') or (ds='7'));
> since different serdes are used.

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