[jira] [Created] (HIVE-24240) Implement missing features in UDTFStatsRule

[okumin (Jira)]

okumin created HIVE-24240:
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 Summary: Implement missing features in UDTFStatsRule
 Key: HIVE-24240
 URL: https://issues.apache.org/jira/browse/HIVE-24240
 Project: Hive
  Issue Type: Improvement
Affects Versions: 4.0.0
Reporter: okumin
Assignee: okumin


Add the following steps.
 * Handle the case in which the num row will be zero
 * Compute runtime stats in case of a re-execution



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[jira] [Created] (HIVE-24239) Reduce side chain of Map join produce wrong result

[Manoj Kumar (Jira)]

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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