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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