Apex 4.1 Error handling question

Question

Apex 4.1
Hi There,
Just had a query regarding error handling. As per Apex documentation we can add more information to our error messages. I wanted to add custom text and also the actual Ora or any other message
E.g
begin
  if 1=1 then
    l_error := 1/0;
end if;
exception
when others then
    APEX_ERROR.ADD_ERROR (
    p_message          => 'Error1',
    p_additional_info  => 'Test1',
    p_display_location => apex_error.c_inline_in_notification);
end;Wanted to know, if we want to add the actual error message also, what do we need to add to the ADD_ERROR procedure? I wanted to record the sqlerrm message.
Thanks

Answer 1

The only problem with the example was I don't think it handles not null constraints real well. Usually have a constraint name like 'SYS_SOMENUMBER'. So as a result, the extract_constraint_name is not successful.
I handled this by doing the following:
if l_constraint_name IS NULL AND p_error.ora_sqlerrm IS NOT NULL THEN
     --NOT NULL constraints don't display the constraint name in the error, find another way
    --Added check for ora_sqlerrm as if there is a page validation, it still enters the function, but with no sqlerrm
        declare
            l_cons_split APEX_APPLICATION_GLOBAL.VC_ARR2;
            l_owner user_constraints.owner%type;
            l_table_name user_constraints.table_name%type;
            l_column_name user_cons_columns.column_name%type;
            l_table_column varchar2(400);
        BEGIN
            --get the section enclosed in parenthesis
            l_table_column := regexp_substr(p_error.ora_sqlerrm, '\([^)]*\)');
            --remove parenthesis and quotes
            l_table_column := regexp_replace(l_table_column, '[(")]');
            --split the data by period
            l_cons_split := apex_util.string_to_table(l_table_column, '.');
            --determine the constraint name by querying user_constraints
            l_table_name := l_cons_split(l_cons_split.COUNT-2);
            l_table_name := l_cons_split(l_cons_split.COUNT-1);
            l_column_name := l_cons_split(l_cons_split.COUNT);
            select uc.constraint_name into l_constraint_name
            from user_constraints uc, user_cons_columns ucc
            where uc.constraint_name = ucc.constraint_name
            and uc.owner = ucc.owner
            and uc.table_name = l_table_name
            and ucc.column_name = l_column_name
            and get_search_condition(uc.constraint_name, uc.owner) like '%IS NOT NULL%'; --gets the search condition as varchar
        END;
    END IF;{code}
That's slightly off topic, but just thought i'd mention it :)