Hey All, I am wondering what is the reason why Function input types are validated?
This might become an issue if the user wants to write his own TypeInfo for a type that flink also handles natively. Let's say I want to implement my own TupleTypeinfo that handles null values, and I pass this typeinfo in the returns call of an operation. This will most likely fail when the next operation validates the input although I think it shouldn't. But the funny thing about this is that this can actually be easily circumvented as the validation function calls: actualType.equals(expected type), so you can trick it by making your custom type's equal method return true. Thanks, Gyula
