[jira] [Created] (CALCITE-6713) NVL2's return data type should be nullable if and only if at least one of the second and third parameters are nullable

[xiong duan (Jira)]

xiong duan created CALCITE-6713:
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             Summary: NVL2's return data type should be nullable if and only if 
at least one of the second and third parameters are nullable
                 Key: CALCITE-6713
                 URL: https://issues.apache.org/jira/browse/CALCITE-6713
             Project: Calcite
          Issue Type: Bug
            Reporter: xiong duan


The Expression:
{code:java}
nvl2(NULL, 'abc', NULL); {code}
should return null with a nullable type.



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