liuxian created SPARK-27083:
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Summary: Add a config to control subqueryReuse
Key: SPARK-27083
URL: https://issues.apache.org/jira/browse/SPARK-27083
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: liuxian
Subquery Reuse and Exchange Reuse are not the same feature， if we don't want to
reuse subqueries，and we just want to reuse exchanges，only one configuration
that cannot be done.
So I think we should add a new configuration to control subqueryReuse.
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