[jira] [Created] (FLINK-10049) Unify the processing logic for NULL arguments in SQL built-in functions

[Shang Yuanchun (Jira)]

Xingcan Cui created FLINK-10049:
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             Summary: Unify the processing logic for NULL arguments in SQL built-in functions
                 Key: FLINK-10049
                 URL: https://issues.apache.org/jira/browse/FLINK-10049
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Xingcan Cui


Currently, the built-in functions treat NULL arguments in different ways. E.g., ABS(NULL) returns NULL, while LOG10(NULL) throws an NPE. The general SQL-way of handling NULL values should be that if one argument is NULL the result is NULL. We should unify the processing logic for that.



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