diff --git a/datafusion/physical-expr/src/intervals/cp_solver.rs b/datafusion/physical-expr/src/intervals/cp_solver.rs
index cde1b5cae8b18..3803c5d1f285c 100644
--- a/datafusion/physical-expr/src/intervals/cp_solver.rs
+++ b/datafusion/physical-expr/src/intervals/cp_solver.rs
@@ -176,7 +176,7 @@ impl ExprIntervalGraphNode {
         &self.interval
     }
 
-    /// This function creates a DAEG node from Datafusion's [`ExprTreeNode`]
+    /// This function creates a DAEG node from Datafusion's [`PhysicalExpr`]
     /// object. Literals are created with definite, singleton intervals while
     /// any other expression starts with an indefinite interval ([-∞, ∞]).
     pub fn make_node(expr: &Arc<dyn PhysicalExpr>, schema: &Schema) -> Result<Self> {
diff --git a/datafusion/physical-expr/src/utils/mod.rs b/datafusion/physical-expr/src/utils/mod.rs
index 1ab51e50d1192..aa907d6ea6e33 100644
--- a/datafusion/physical-expr/src/utils/mod.rs
+++ b/datafusion/physical-expr/src/utils/mod.rs
@@ -125,9 +125,8 @@ pub fn get_indices_of_exprs_strict<T: Borrow<Arc<dyn PhysicalExpr>>>(
         .collect()
 }
 
-/// This struct facilitates the [TreeNodeRewriter] mechanism to convert a
-/// [PhysicalExpr] tree into a DAEG (i.e. an expression DAG) by collecting
-/// identical expressions in one node. Caller specifies the node type in the
+/// This struct converts a [PhysicalExpr] tree into a DAEG (i.e. an expression DAG) by
+/// collecting identical expressions in one node. Caller specifies the node type in the
 /// DAEG via the `constructor` argument.
 struct PhysicalExprDAEGBuilder<'a, T, F: Fn(&Arc<dyn PhysicalExpr>) -> Result<T>> {
     // The resulting DAEG (expression DAG).