neilconway commented on code in PR #21240:
URL: https://github.com/apache/datafusion/pull/21240#discussion_r3011629793
##########
datafusion/physical-plan/src/scalar_subquery.rs:
##########
@@ -237,6 +237,10 @@ impl ExecutionPlan for ScalarSubqueryExec {
self.true_for_input_only()
}
+ fn partition_statistics(&self, partition: Option<usize>) ->
Result<Arc<Statistics>> {
+ self.input.partition_statistics(partition)
Review Comment:
Sorry, I want to make sure I understand. `partition_statistics` is about the
statistics for the *output* of the plan node. The output of
`ScalarSubqueryExec` is identical to the output of its main input child node;
the n other children are just subqueries whose result values get used somewhere
by the main input plan. The statistics of the child subqueries don't direct
influence the properties of the output of the `ScalarSubqueryExec` itself. Lmk
if I'm misunderstanding you though!
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