Balazs Jeszenszky created IMPALA-7592:
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Summary: Planner should correctly estimate UnionNode host count
Key: IMPALA-7592
URL: https://issues.apache.org/jira/browse/IMPALA-7592
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Affects Versions: Impala 3.0
Reporter: Balazs Jeszenszky
Currently, the planner estimates UnionNode host count to be the maximum of all
its children. In reality, scheduler will put these nodes on the union of its
inputs' hosts. We should update the planner to correctly account for this
behaviour.
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