Gopal V created HIVE-16182:
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Summary: Semijoin: Avoid VectorHashKeyWrapper allocations for the
bloom hash aggregate
Key: HIVE-16182
URL: https://issues.apache.org/jira/browse/HIVE-16182
Project: Hive
Issue Type: Improvement
Components: Vectorization
Affects Versions: 2.2.0
Reporter: Gopal V
To avoid GC spam during the hash aggregate part of the bloom filter, the key
for the semijoin can be special-cased as an immutable empty key.
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