friendlymatthew commented on code in PR #17242:
URL: https://github.com/apache/datafusion/pull/17242#discussion_r2302043230
##########
datafusion-examples/examples/parquet_exec_visitor.rs:
##########
@@ -98,9 +98,11 @@ impl ExecutionPlanVisitor for ParquetExecVisitor {
fn pre_visit(&mut self, plan: &dyn ExecutionPlan) -> Result<bool,
Self::Error> {
// If needed match on a specific `ExecutionPlan` node type
if let Some(data_source_exec) =
plan.as_any().downcast_ref::<DataSourceExec>() {
- if let Some((file_config, _)) =
+ if let Some(parquet_source) =
data_source_exec.downcast_to_file_source::<ParquetSource>()
{
+ let file_config = parquet_source.config();
+
self.file_groups = Some(file_config.file_groups.clone());
Review Comment:
Hm, interesting point. With
[5d4e834](https://github.com/apache/datafusion/pull/17242/commits/5d4e834c1839a130372243514bbee31ae03a986e),
I'm starting to see a stratified API for `T: FileSource`, where certain
methods are called directly on `T` and others via `T::FileScanConfig`.
The statistics getters were the only blatant cases where it was better
served to have those functions live on `T`. I think having a `file_groups()` on
`T` makes sense, but so does a lot of the functions that live in
`T::FileScanConfig`.
Will think more about this
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