Github user icexelloss commented on the issue:
https://github.com/apache/spark/pull/20428
* `PANDAS SCALAR UDF` -> `SCALAR PANDAS UDF`
This doesn't really change the API so +1
* `PANDAS GROUP MAP UDF` -> `GROUPED MAP PANDAS UDF`
The API changes from `PandasUDFType.GROUP_MAP` to
`PandasUDFType.GROUPED_MAP`. I think this is fine as well.
* `PANDAS GROUP AGG UDF` -> `PANDAS UDAF`
The API changes from `PandasUDFType.GROUP_AGG` to `PandasUDFType.UDAF`. I
don't love this because it feels different from `SCALAR` and `GROUPED_MAP`. I
would probably call it something like `GROUPED_AGG`. But since this type is not
released in 2.3, we can always change later.
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