Mihailo Timotic created SPARK-56181:
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             Summary: Guard against unresolved attributes in constraint 
inference
                 Key: SPARK-56181
                 URL: https://issues.apache.org/jira/browse/SPARK-56181
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 4.2.0
            Reporter: Mihailo Timotic


Guard against {{UnresolvedAttribute}} in 
{{ConstraintHelper.constructIsNotNullConstraints}} by checking 
{{Attribute.resolved}} before accessing {{{}Attribute.nullable{}}}.



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