diff --git a/‎datafusion/physical-plan/src/joins/asof_join.rs‎
Lines changed: 3 additions & 1 deletion b/‎datafusion/physical-plan/src/joins/asof_join.rs‎
Lines changed: 3 additions & 1 deletion
@@ -379,7 +379,9 @@ impl ExecutionPlan for AsOfJoinExec {
     }
 
     fn maintains_input_order(&self) -> Vec<bool> {
-        vec![false, false]
+        // ASOF emits exactly one row for each left row and never reorders the
+        // left input. The right input is scanned independently.
+        vec![true, false]
     }
 
     fn children(&self) -> Vec<&Arc<dyn ExecutionPlan>> {
Original file line number	Diff line number	Diff line change
`@@ -379,7 +379,9 @@ impl ExecutionPlan for AsOfJoinExec {`
`379`	`379`	`}`
`380`	`380`
`381`	`381`	`fn maintains_input_order(&self) -> Vec<bool> {`
`382`		`- vec![false, false]`
	`382`	`+ // ASOF emits exactly one row for each left row and never reorders the`
	`383`	`+ // left input. The right input is scanned independently.`
	`384`	`+ vec![true, false]`
`383`	`385`	`}`
`384`	`386`
`385`	`387`	`fn children(&self) -> Vec<&Arc<dyn ExecutionPlan>> {`