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; 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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