How to set client within SQL statement without using another pl/sql stmt.

Question

I have a following select statement
SELECT SUM (w.prior_forecasted_costs + w.prior_committed_costs)
FROM xxsuf.job_cost_summary_table w,
apps.pa_periods p,
pa.pa_resources bz,
pa.pa_resource_list_members cz,
pa.pa_tasks dz
WHERE w.project_id = z.project_id
AND w.task_id = dz.task_id
AND dz.task_number '98000'
AND w.resource_list_member_id = cz.resource_list_member_id
AND cz.resource_id = bz.resource_id
AND NOT EXISTS (SELECT NULL
FROM pa.pa_tasks zz
WHERE zz.parent_task_id = dz.task_id)
AND w.resource_list_member_id != 1000
AND p.period_name = w.pa_period
AND p.current_pa_period_flag = 'Y'
Above select statement uses pa_periods view which only works when I set my client using "exec DBMS_Application_Info.set_client_info(83);" in Toad or SQL*Plus session.
I was wondering how can I achieve it within select statement. so that I don't have to use another PL/SQL statement to set my client. Is there anyway to set client with my org id within above select statement ?
Please advise.
--Rakesh                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer 1

You can simply create a function which calls dbms_application_info and use that in your sql statement as in
SQL> create or replace function set_client_info (i_info varchar2)
   return varchar2
as
begin
   dbms_application_info.set_client_info (i_info);
   return i_info;
end set_client_info;
Function created.
SQL> create or replace view v_emp
as
  select * from emp where empno = to_number(sys_context('userenv','client_info'))
View created.
SQL> select ename from v_emp where set_client_info(7788) is not null
ENAME    
SCOTT    
1 row selected.
SQL> select ename from v_emp where set_client_info(7900) is not null
ENAME    
JAMES    
1 row selected.