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https://issues.apache.org/jira/browse/HIVE-3824?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13550871#comment-13550871
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Ashutosh Chauhan commented on HIVE-3824:
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+1
> 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
>
>
> 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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