No Results after build a Parent-Child Hierarchy in OBIEE11G

Question

Hi All:
Here's an problem. I followed the "http://sandybi.wordpress.com/2010/08/17/hierarchies-in-obiee-11g-part-1/" this article step by step to create a parent-child hierarchy in admin tool in OBIEE11G.
But after check in and try to retrieve the hierarchy data in Answer. There's always displays "No Results."
Is there any suggestions for this ? Really urgent and thanks for your help.
Best regards
Sunny

Answer 1

@Aketi
It is One way that We derive
"sys_connect_by_path(RowIDToChar(RowID),'.') as
RowIDList"
Then
We use Left Join Using
"instr(RowIDList,RowIDToChar(RowID))".sorry, didn't catch what you mean.
my site :-)
http://oraclesqlpuzzle.hp.infoseek.co.jp/4-13.html
pity, I don't know Japanese :(
@Rob
your query is good and simple :) probably it's the best alternative for the OP.
But it won't work with not a plain hierarchy, e.g.:
      1
    2   3
      4
    5   6
SQL> create table hierarchy (child,parent)
  2     as
  3     select 1, null from dual union all
  4     select 2, 1 from dual union all
  5     select 3, 1 from dual union all
  6     select 4, 3 from dual union all
  7     select 4, 2 from dual union all
  8     select 5, 4 from dual union all
  9     select 6, 4 from dual
10  /
Table created
SQL>
SQL> create table data (hierarchyid,value)
  2    as
  3    select 5, 10 from dual union all
  4    select 6, 25 from dual
  5  /
Table created
SQL>
SQL> select h.child
  2           , sum(connect_by_root d.value)
  3        from hierarchy h
  4           , data d
  5       where h.child = d.hierarchyid (+)
  6     connect by prior h.parent = h.child
  7       group by h.child
  8       order by h.child
  9  /
     CHILD SUM(CONNECT_BY_ROOTD.VALUE)
         1                          70
         2                          35
         3                          35
         4                          70
         5                          10
         6                          25
6 rows selected
SQL>