Zoltan Haindrich created HIVE-20913:

             Summary: Narrowing nullability may cause typecheck failures
                 Key: HIVE-20913
                 URL: https://issues.apache.org/jira/browse/HIVE-20913
             Project: Hive
          Issue Type: Bug
            Reporter: Zoltan Haindrich
            Assignee: Zoltan Haindrich

CALCITE-1413 have added a logic to narrow an expression's type from nullable to 
non-nullable - this causes some issues for Hive side sanity checks.

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