Fengdong Yu created HIVE-4891:
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Summary: Distinct includes duplicate records
Key: HIVE-4891
URL: https://issues.apache.org/jira/browse/HIVE-4891
Project: Hive
Issue Type: Bug
Components: HiveServer2
Affects Versions: 0.10.0
Reporter: Fengdong Yu
I have two partitions, one is sequence file, another is RCFile, but they are
the same data(only different file format).
I have the following SQL:
{code}
select distinct uid from pv where (dt ='20130718' or dt ='20130718_1') and
cur_url like '%cq.aa.com%';
{code}
dt ='20130718' is sequence file,(default input format, which specified when
create table)
dt ='20130718_1' is RCFile.
ALTER TABLE test PARTITION(dt='20130718_1') SET FILEFORMAT RCFILE;
but there are duplicate recoreds in the result.
If two partitions with the same input format, then there are no duplicate
records.
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