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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-3824) bug if different serdes are used for different partitions
Date Thu, 20 Dec 2012 09:13:12 GMT
Namit Jain created HIVE-3824:
--------------------------------

             Summary: 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


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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