Fix violations of G-1050

docs/4-language-usage/5-exception-handling/g-5080.md

@@ -19,6 +19,7 @@ create or replace package body order_api as
    ) is
       co_customer_id constant customer.id%type                  := in_customer_id;
       co_discount    constant customer.discount_percentage%type := in_discount;
+      co_error_label constant type_up.text                      := 'Error: ';
    begin
       customer_api.apply_discount(
          in_customer_id => co_customer_id
@@ -29,7 +30,7 @@ create or replace package body order_api as
       when zero_divide then
          null; -- ignore
       when others then
-         logging_package.log_error('Error: ' || sqlerrm);
+         logging_package.log_error(co_error_label || sqlerrm);
          raise;
    end discount_and_recalculate;
 end order_api;
@@ -44,8 +45,10 @@ create or replace package body order_api as
       in_customer_id in integer
      ,in_discount    in number
    ) is
-      co_customer_id constant customer.id%type                  := in_customer_id;
-      co_discount    constant customer.discount_percentage%type := in_discount;
+      co_customer_id     constant customer.id%type                  := in_customer_id;
+      co_discount        constant customer.discount_percentage%type := in_discount;
+      co_error_label     constant type_up.text                      := 'Error: ';
+      co_backtrace_label constant type_up.text                      := ' - Backtrace: ';
    begin
       customer_api.apply_discount(
          in_customer_id => co_customer_id
@@ -57,9 +60,9 @@ create or replace package body order_api as
          null; -- ignore
       when others then
          logging_package.log_error(
-            'Error: '
+            co_error_label
             || sqlerrm
-            || ' - Backtrace: '
+            || co_backtrace_label
             || sys.dbms_utility.format_error_backtrace
          );
          raise;