Brock Noland created HIVE-4845:
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Summary: Correctness issue with MapJoins using the null safe
operator
Key: HIVE-4845
URL: https://issues.apache.org/jira/browse/HIVE-4845
Project: Hive
Issue Type: Bug
Reporter: Brock Noland
Assignee: Brock Noland
Priority: Critical
I found a correctness issue while working on HIVE-4838. The following query
from join_nullsafe.q gives different results depending on if it's executed
map-side or reduce-side:
{noformat}
SELECT /*+ MAPJOIN(a) */ * FROM smb_input1 a JOIN smb_input1 b ON a.key <=>
b.key AND a.value <=> b.value ORDER BY a.key, a.value, b.key, b.value;
{noformat}
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