xudong963 commented on code in PR #15503:
URL: https://github.com/apache/datafusion/pull/15503#discussion_r2027099982
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datafusion/physical-plan/src/execution_plan.rs:
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@@ -427,6 +427,16 @@ pub trait ExecutionPlan: Debug + DisplayAs + Send + Sync {
Ok(Statistics::new_unknown(&self.schema()))
}
+ /// Returns statistics for each partition of this `ExecutionPlan` node.
+ /// If statistics are not available, returns an array of
+ /// [`Statistics::new_unknown`] for each partition.
+ fn statistics_by_partition(&self) -> Result<Vec<Statistics>> {
Review Comment:
Love it!
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