[jira] [Created] (FLINK-17373) Support the NULL type for function calls

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-17373:
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             Summary: Support the NULL type for function calls
                 Key: FLINK-17373
                 URL: https://issues.apache.org/jira/browse/FLINK-17373
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / API, Table SQL / Planner
            Reporter: Timo Walther
            Assignee: Timo Walther


According to FLIP-37, the null type is used to represent untyped NULL literals. Those are in particular useful when it comes to passing them to a function call. The new type inference of FLIP-65 is able to process call such as `f(NULL)`.



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