Hi, I'd like to start a discussion of FLIP-539: Support WITH Clause in CREATE FUNCTION Statement in Flink SQL [1].
The existing CREATE FUNCTION statement in Flink SQL allows users to register user-defined functions (UDFs) by specifying the class name and the artifact (JAR) containing the implementation. While this design covers common use cases, it lacks a declarative mechanism for associating arbitrary properties or metadata with the function at creation time. Other Flink SQL objects—such as tables—support a WITH clause for specifying options in a key-value fashion, improving consistency, discoverability, and extensibility. Looking forward to comments and suggestions for improvements! Best, Dawid [1] https://cwiki.apache.org/confluence/x/sg9JFg
