adriangb commented on code in PR #17129:
URL: https://github.com/apache/datafusion/pull/17129#discussion_r2269666838
##########
datafusion/datasource/src/source.rs:
##########
@@ -320,7 +321,39 @@ impl ExecutionPlan for DataSourceExec {
&self,
projection: &ProjectionExec,
) -> Result<Option<Arc<dyn ExecutionPlan>>> {
- self.data_source.try_swapping_with_projection(projection)
+ match self.data_source.try_swapping_with_projection(projection)? {
+ Some(new_plan) => {
+ if let Some(new_data_source_exec) =
+ new_plan.as_any().downcast_ref::<DataSourceExec>()
Review Comment:
good point, it's https://github.com/apache/datafusion/issues/15952, should
have put that in the code comment
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