HyukjinKwon opened a new pull request, #44379:
URL: https://github.com/apache/spark/pull/44379
### What changes were proposed in this pull request?
This PR implements `Scan.description` so it has a better string description
in `DataFrame.explain`.
```python
spark.table("pythonSourceTable").explain(True)
```
Before:
```
== Physical Plan ==
*(1) Project [x#0, y#1]
+- BatchScan test[x#0, y#1] class
org.apache.spark.sql.execution.python.PythonTableProvider$$anon$1$$anon$2
RuntimeFilters: []
```
After:
```
== Physical Plan ==
*(1) Project [x#0, y#1]
+- BatchScan test[x#0, y#1] (Python) RuntimeFilters: []
```
### Why are the changes needed?
Now it shows the class name for nested classes, which isn't quite pretty.
### Does this PR introduce _any_ user-facing change?
It changes the plan description but the main change has not been released
out yet. So no.
### How was this patch tested?
Manually tested as above.
### Was this patch authored or co-authored using generative AI tooling?
No.
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