How to fetch data for all OUs

Question

Hi,
Run below query:
select * FROM PO_headers
Result: no data
EXECUTE MO_GLOBAL.set_POLICY_CONTEXT('S','120');
Run below query:
select * FROM PO_headers
Result:data for org_id=120
EXECUTE MO_GLOBAL.set_POLICY_CONTEXT('A','');
select * FROM PO_headers
Result: no data
So how can we fetch data from all OUs whothout using PO_HEADERS_ALL tables?
why do we have this MO_GLOBAL.set_POLICY_CONTEXT('A','') option?

Answer 1

in 11i PO_HEADERS is view with org_id policy
in r12 PO_HEADERS is synonym with policies based on multi-org
so for r12
SQL> select count(*) from po_headers;
  COUNT(*)
         0
SQL> begin
  2    mo_global.set_policy_context('S', 101);
  3  end;
  4  /
PL/SQL procedure successfully completed
SQL> select count(*) from po_headers;
  COUNT(*)
       110
SQL> begin
  2    mo_global.set_policy_context('S', 82);
  3  end;
  4  /
PL/SQL procedure successfully completed
SQL> select count(*) from po_headers;
  COUNT(*)
       235
SQL>
SQL> begin
  2      mo_global.init('SQLAP');
  3  end;
  4  /
PL/SQL procedure successfully completed
SQL> select count(*) from po_headers;
  COUNT(*)
       345
SQL> select unique org_id from po_headers;
    ORG_ID
        82
       101
SQL> mo_global.set_policy_context('S',<org_id>) - single operating unit
mo_global.init(<app_short_name>) - multi operating unit