Reg:- hirachy query.

Question

Dear Frieds,
i have requirement but i have some restriction to use in plsql code.
like 1) In the Loop select is not used.
now requirement as below.
i have define one hierarchy Query which i have used in explicit cursor.
the cursor query return 3 parent departmentid like........(101,102,103)
it means 102 parent of 101 and 103 parent of 102.
now i want check this deparment id in another query one by one....like below...
select count(1) from mst_menu where deptid=101.
here i have condition.like if 101 deptid is present above table then execute select query ..if it not present then check next department id i.e. 102...
so,how can i execute select query if data is present and if no then how can i take next dept id to check.
pls help.
--Rajnish                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

Answer 1

NOT TESTED! an old fashioned approach because no database version was given
declare
  the_list varchar2(4000) := '(101,102,103)';
  dept_id  varchar2(10);
  present  pls_integer;
  flag     boolean := false;
begin
  the_list := replace(replace(the_list,'(',','),')',',');
  items_no := length(the_list) - length(replace(the_list,',','')) - 1;
  for i in 1 .. items_no loop
    dept_id := substr(the_list,instr(the_list,',',1,i) + 1,instr(the_list,',',1,i + 1) - instr(the_list,',',1,i) - 1);
    select count(*)
      into present
      from mst_menu
     where deptid = dept_id;
    if present != 0 then
      flag := true;
      exit;
    end if;
  end loop;
  if flag then
    null;       -- execute the select query here
  end if;
end;Regards
Etbin
Edited by: Etbin on 22.5.2010 11:16
corrected instr function calls - paramater ',' was missing