Wenchen Fan created SPARK-29743:
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Summary: sample should set needCopyResult to true if its child is
Key: SPARK-29743
URL: https://issues.apache.org/jira/browse/SPARK-29743
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.4.0
Reporter: Wenchen Fan
Assignee: Wenchen Fan
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