xudong963 commented on code in PR #15852:
URL: https://github.com/apache/datafusion/pull/15852#discussion_r2059740385
##########
datafusion/physical-plan/src/execution_plan.rs:
##########
@@ -430,6 +430,32 @@ pub trait ExecutionPlan: Debug + DisplayAs + Send + Sync {
Ok(Statistics::new_unknown(&self.schema()))
}
+ /// Returns statistics for a specific partition of this `ExecutionPlan`
node.
+ /// If statistics are not available, should return
[`Statistics::new_unknown`]
+ /// (the default), not an error.
+ /// If `partition` is `None`, it returns statistics for the entire plan.
+ fn partition_statistics(&self, partition: Option<usize>) ->
Result<Statistics> {
Review Comment:
Todo: mark `fn statistics(&self) -> Result<Statistics>` as deprecated
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