Manoj Kumar created HIVE-24239:
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Summary: Reduce side chain of Map join produce wrong result
Key: HIVE-24239
URL: https://issues.apache.org/jira/browse/HIVE-24239
Project: Hive
Issue Type: Bug
Components: llap
Affects Versions: 3.1.0
Reporter: Manoj Kumar
Attachments: 1602055956.svg
Getting the wrong result on multiple queries.
On further debug it seems queries follow a common pattern on reduce side chain
of mapjoin.
[Observation]
If we have a chain of mapjoin on the reduce side, each mapjoin gets side tables
as buckted.
Ideally in a chain of map joins we should get side table as broadcast except
for the first side table.
Attaching pla of TPCH Q5 for reference.
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