Is it possible to filter the nested table result set of table column

Question

Hi
Create or replace type address_record
as object
( address_no number,
address_name varchar2,
address_startDate date,
address_expiryDate date
create or replace type address_rec_tab
as table of address_record;
Create table employee
(emp_no number,
emp_name varchar2,
adresses address_rec_tab
1st approach
==========
<pre>
select
emp.emp_no,
emp.emp_name,
emp.addresses
from employee emp,
table(*emp.addresses*) add
where add.address_expiryDate >=sysdate
</pre>
In the above example my SQL query address collection object is not returning filtered or current address list.
I suppose this is due to fact taht my where clause is not attached to the nested table.
Through my reading I gather that I can only use the following query to filter the address collection.
2nd approach
==========
<pre>
select
emp.emp_no,
emp.emp_name
cursor(select address_no,
address_name,
address_startDate,
address_expiryDate
from employee emp,
table (*emp.addresses*) add
where add.address_expiry_date >=sysdate)
from employee emp,
table (*emp.addresses*) add
where add.address_expiry_date >=sysdate) -- probably this redundent
</pre>
But this approch forces me to rebuild addresses collection object.
I was wondering anybody can suggest me a way so that 1st approach works? I do not have to rebuild collection object in this way.
Thanks for your help in advance
Regards
Charan

Answer 1

Create statements have been slightly modified;
Create or replace type address_record as object
( address_no          number,
  address_name        varchar2(20),
  address_startDate   date,
  address_expiryDate  date
create or replace type address_rec_tab as table of address_record;
Create table employee
(emp_no number,
emp_name varchar2(20),
add_list address_rec_tab
nested table add_list store as a_list
insert into employee values (1, 'KMCHARAN', address_rec_tab ( address_record(1, 'NORTH POLE', trunc(sysdate-1), trunc(sysdate+10) ) ,
                                                              address_record(1, 'SOUTH_POLE', trunc(sysdate-1), trunc(sysdate+10) )
insert into employee values (2, 'ME', address_rec_tab ( address_record(2, 'EAST', trunc(sysdate-2), trunc(sysdate+12) ) ,
                                                        address_record(2, 'WEST', trunc(sysdate-2), trunc(sysdate+12) )
SQL> l
  1  select *
  2  from employee
  3      ,table(add_list) a
  4* where a.Address_StartDate = trunc(sysdate-1)
SQL> /
    EMP_NO EMP_NAME
ADD_LIST(ADDRESS_NO, ADDRESS_NAME, ADDRESS_STARTDATE, ADDRESS_EXPIRYDATE)
ADDRESS_NO ADDRESS_NAME         ADDRESS_S ADDRESS_E
         1 KMCHARAN
ADDRESS_REC_TAB(ADDRESS_RECORD(1, 'NORTH POLE', '08-APR-10', '19-APR-10'), ADDRESS_RECORD(1, 'SOUTH_
         1 NORTH POLE           08-APR-10 19-APR-10
         1 KMCHARAN
ADDRESS_REC_TAB(ADDRESS_RECORD(1, 'NORTH POLE', '08-APR-10', '19-APR-10'), ADDRESS_RECORD(1, 'SOUTH_
         1 SOUTH_POLE           08-APR-10 19-APR-10