Joe McDonnell created IMPALA-15631:
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Summary: Construct broadcast hash tables using multiple threads
Key: IMPALA-15631
URL: https://issues.apache.org/jira/browse/IMPALA-15631
Project: IMPALA
Issue Type: Improvement
Components: Backend, Frontend
Affects Versions: Impala 5.0.0
Reporter: Joe McDonnell
For broadcast hash joins, the build side uses a single thread. This is becoming
a bottleneck for larger build sides. This Jira tracks implementing a parallel
join build that uses multiple threads to build the same hash tables as today
(i.e. the probe side doesn't change).
This may become an epic.
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