Liang-Chi Hsieh created SPARK-14111:
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Summary: Correct output nullability with constraints for logical
plans
Key: SPARK-14111
URL: https://issues.apache.org/jira/browse/SPARK-14111
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Liang-Chi Hsieh
We use output of logical plan as schema. Output nullablity is important and we
should keep its correctness.
With constraints and optimization, in fact we will change output nullability of
logical plans. But we don't reflect such changes in the output attributes. So
the output nullablity is not correct now.
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