diff --git a/extensions/functions_comparison.yaml b/extensions/functions_comparison.yaml
index 173a6d1b3..8cf67572a 100644
--- a/extensions/functions_comparison.yaml
+++ b/extensions/functions_comparison.yaml
@@ -225,18 +225,8 @@ scalar_functions:
           - value: T
         variadic:
           min: 2
-        return: T|?
-  -
-    name: "least_skip_null"
-    description: >-
-      Evaluates each argument and returns the smallest one. The function will return
-      null only if all arguments evaluate to null.
-    impls:
-      - args:
-          - value: T
-        variadic:
-          min: 2
-        return: T&?
+        return: T
+        nullability: MIRROR
   -
     name: "greatest"
     description: >-
@@ -247,15 +237,5 @@ scalar_functions:
           - value: T
         variadic:
           min: 2
-        return: T|?
-  -
-    name: "greatest_skip_null"
-    description: >-
-      Evaluates each argument and returns the largest one. The function will return
-      null only if all arguments evaluate to null.
-    impls:
-      - args:
-          - value: T
-        variadic:
-          min: 2
-        return: T&?
+        return: T
+        nullability: MIRROR