Wenchen Fan created SPARK-22682:
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Summary: HashExpression does not need to create global variables
Key: SPARK-22682
URL: https://issues.apache.org/jira/browse/SPARK-22682
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.3.0
Reporter: Wenchen Fan
Assignee: Wenchen Fan
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