Gopal V created HIVE-10215:
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Summary: Large IN() clauses: deep hashCode performance during
optimizer pass
Key: HIVE-10215
URL: https://issues.apache.org/jira/browse/HIVE-10215
Project: Hive
Issue Type: Bug
Components: Logical Optimizer
Reporter: Gopal V
Assignee: Gopal V
The logical optimizer uses several maps and sets, which are exceeding expensive
for large IN() clauses due to the fact that several part of the queries walk
over the lists without short-circuiting during hashCode(), while equals() is
faster due to short-circuiting via less expensive operators.
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