Yin Huai created SPARK-2695:
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Summary: Figure out a good way to handle NullType columns.
Key: SPARK-2695
URL: https://issues.apache.org/jira/browse/SPARK-2695
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Yin Huai
For example, if a JSON dataset has a field which only has null values, we will
get NullType when we turn that dataset as a SchemaRDD. We need to think about
what is the good way to deal with NullType columns.
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