Calling boolean function from tree query

Question

Hi all,
I have placed a tree on my sidebar region from the following query
select PAGE_NO id,
PARENT_PAGE_NO pid,
NAME name,
'f?p=&APP_ID.:'||page_no||':&SESSION.' link,
null a1,
null a2
from #OWNER#.APEX_PAGES
WHERE page_no = :APP_PAGE_ID
AND nvl(navigation,'N') = 'Y'
Its running perfectly fine. Now i have my custom function "isUserAllowed(app_user, name_of_node, isParent)" which returns a boolean expression is the logged in User has access privilege on that node.
How can i run my function inside the tree query so that node is visible only for those values in which my function returns "true"? and not on others?
With Regards,
Sunil Bhatia

Answer 1

The "wrapper" function would actually be pretty easy - just another function to call the one returning the boolean and convert it to some other value, numeric or character. something like (untested)
<pre>
FUNCTION wrapper_function(P_whatever varchar2) return varchar2 IS
v_return_value_c varchar2(5);
BEGIN
r_return_value_c := case boolean_function(p_whatever)
when true then 'true'
else 'false;
return v_return_value_c;
END;
</pre>
Using the function in the WHERE clause could look something like this (untested, but should work if done correctly)
<pre>
select whatever
from your_table
where wrapper_function(whatever) = 'true'
</pre>