andygrove opened a new issue, #4336:
URL: https://github.com/apache/datafusion-comet/issues/4336
### Describe the bug
The `CometUDF` trait lives in the `common` module. It references the Arrow
class `ValueVector`.
```scala
trait CometUDF {
def evaluate(inputs: Array[ValueVector], numRows: Int): ValueVector
}
```
The Arrow dependencies are shaded in the `common` module and cannot be
accessed from the `spark` module. This means that it is not possible to
implement UDFs that need access to existing Comet code in the `spark` module.
### Steps to reproduce
_No response_
### Expected behavior
_No response_
### Additional context
_No response_
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