Jefffrey commented on issue #17964:
URL: https://github.com/apache/datafusion/issues/17964#issuecomment-3540596695
This is interesting; I checked on PySpark (4.0.1) and it seems it should be
a void (aka null) type:
```python
>>> spark.sql("select array()").printSchema()
root
|-- array(): array (nullable = false)
| |-- element: void (containsNull = false)
```
So the behaviour of setting it to `Int32` when no columns are provided isn't
consistent with Spark 🤔
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