diff --git a/docs/4-language-usage/9-function-usage/g-9030.md b/docs/4-language-usage/9-function-usage/g-9030.md
index c218f227..6057ac23 100644
--- a/docs/4-language-usage/9-function-usage/g-9030.md
+++ b/docs/4-language-usage/9-function-usage/g-9030.md
@@ -15,12 +15,17 @@ When converting from strings to other datatypes using a conversion function that
 
 ``` sql
 create or replace package body employee_api is
-   procedure set_dob(in_employee_id in employees.employee_id%type
-                    ,in_dob_str     in varchar2) is
+   procedure set_dob(
+      in_employee_id in employees.employee_id%type
+     ,in_dob_str     in varchar2
+   ) is
+      co_employee_id constant employees.employee_id%type := in_employee_id;
+      co_dob_str     constant type_up.date_string        := in_dob_str;
    begin
       update employees
-         set date_of_birth = to_date(in_dob_str,'YYYY-MM-DD')
-       where employee_id = in_employee_id;
+         set date_of_birth = to_date(co_dob_str,'FXYYYY-MM-DD' -- NOSONAR G-1050 must be a literal
+)
+       where employee_id = co_employee_id;
    end set_dob;
 end employee_api;
 /
@@ -30,12 +35,19 @@ end employee_api;
 
 ``` sql
 create or replace package body employee_api is
-   procedure set_dob(in_employee_id in employees.employee_id%type
-                    ,in_dob_str     in varchar2) is
+   procedure set_dob(
+      in_employee_id in employees.employee_id%type
+     ,in_dob_str     in varchar2
+   ) is
+      co_employee_id constant employees.employee_id%type := in_employee_id;
+      co_dob_str     constant type_up.date_string        := in_dob_str;
    begin
       update employees
-         set date_of_birth = to_date(in_dob_str default null on conversion error,'YYYY-MM-DD')
-       where employee_id = in_employee_id;
+         set date_of_birth = to_date(
+                co_dob_str default null on conversion error
+               ,'FXYYYY-MM-DD' -- NOSONAR G-1050 must be a literal
+             )
+       where employee_id = co_employee_id;
    end set_dob;
 end employee_api;
 /