Cheng Lian created SPARK-12867:
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Summary: Nullability of Intersect can be stricter
Key: SPARK-12867
URL: https://issues.apache.org/jira/browse/SPARK-12867
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Cheng Lian
Priority: Minor
{{Intersect}} doesn't override {{SetOperation.output}}, which is defined as:
{code}
override def output: Seq[Attribute] =
left.output.zip(right.output).map { case (leftAttr, rightAttr) =>
leftAttr.withNullability(leftAttr.nullable || rightAttr.nullable)
}
{code}
However, we can replace the {{||}} with {{&&}} for intersection.
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