Cheng Lian created SPARK-12342:
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Summary: Corr (Pearson correlation) should be nullable
Key: SPARK-12342
URL: https://issues.apache.org/jira/browse/SPARK-12342
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 1.6.0, 2.0.0
Reporter: Cheng Lian
Assignee: Cheng Lian
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