diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h
index e107d6e5f81..de782014b2d 100644
--- a/src/include/nodes/execnodes.h
+++ b/src/include/nodes/execnodes.h
@@ -609,15 +609,13 @@ typedef struct ResultRelInfo
 	bool		ri_RootToChildMapValid;
 
 	/*
-	 * Information needed by tuple routing target relations
+	 * Other information needed by child result relations
 	 *
-	 * RootResultRelInfo gives the target relation mentioned in the query, if
-	 * it's a partitioned table. It is not set if the target relation
-	 * mentioned in the query is an inherited table, nor when tuple routing is
-	 * not needed.
+	 * ri_RootResultRelInfo gives the target relation mentioned in the query.
+	 * Used as the root for tuple routing and/or transition capture.
 	 *
-	 * PartitionTupleSlot is non-NULL if RootToChild conversion is needed and
-	 * the relation is a partition.
+	 * ri_PartitionTupleSlot is non-NULL if the relation is a partition to
+	 * route tuples into and ri_RootToChildMap conversion is needed.
 	 */
 	struct ResultRelInfo *ri_RootResultRelInfo;
 	TupleTableSlot *ri_PartitionTupleSlot;