Sergey Shelukhin created HIVE-16017:
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Summary: MM tables - buckets + union is broken
Key: HIVE-16017
URL: https://issues.apache.org/jira/browse/HIVE-16017
Project: Hive
Issue Type: Sub-task
Reporter: Sergey Shelukhin
This duplicates the data (given that the original query is a self-union,
essentially outputs it 4 times instead of 2) for either MM or non-MM tables, on
MM branch.
It seems to be adding correct inputs (esp. in non-MM case the inputs are the
same as before). Presumably something in the output changes in the branch is
broken for this case. Not sure what yet.
{noformat}
CREATE TABLE tbl1_mm(key int, value string) CLUSTERED BY (key) SORTED BY (key)
INTO 2 BUCKETS;
insert overwrite table tbl1_mm select * from src where key < 10;
select key, value from tbl1_mm a where key < 6
union all
select key, value from tbl1_mm a where key < 6;
{noformat}
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