Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/20217
Yup, I am looking at it. `def register(name: String, udf:
UserDefinedFunction)` and `def register[RT: TypeTag](name: String, func:
Function0[RT])`, etc.
The usual way to resemble overloading in Java/Scala is one Python function
having default values + type checking / conversion, up to my knowledge. Here is
what I meant by divergence as we have been extending Python API supports for
different types in this way so far.
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