ulysses you created SPARK-29937:
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Summary: Make FileSourceScanExec class fields lazy
Key: SPARK-29937
URL: https://issues.apache.org/jira/browse/SPARK-29937
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: ulysses you
Since JIRA SPARK-28346,PR [25111|https://github.com/apache/spark/pull/25111],
QueryExecution will copy all node stage-by-stage. This make all node instance
twice almost. So we should make all class fields lazy to avoid create more
unexpected object.
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