Function used in SQL query not showing the desired results

Question

I have created a function that gives me the client id but when i am using the function in the query its not giving me any result i.e. 0 rows but if I execute the function sepreatly and put the result of that function in the qurey it is giving me the desired result please have a look on the following and please reply with you expert opinion:
FUNCTION CODE:
create or replace function j2
(usid in varchar2)
return varchar2
is
cidn_in varchar2(4000) := '';
ls_sep varchar2(1) := ',';
cursor predicate_cidn
is
select
logical_schema_id
from
CLIENT_REGISTRY cr,
MEMBER_ROLE_CLIENT_ASSIGNMENT mrca,
MEMBER m
where
mrca.base_client_id = cr.base_client_id and
mrca.member_id = m.member_id and
cr.schema_in_use_in = '1' and
m.active_status_id = 'A' and
upper(mrca.member_id) = upper(usid);
BEGIN
for GET_CIDN in predicate_cidn
loop
cidn_in := cidn_in || ls_sep || '''' || GET_CIDN.logical_schema_id || '''';
end loop;
cidn_in := substr(cidn_in, 2);
cidn_in := '('||cidn_in||')';
--dbms_output.put_line(cidn_in);
return cidn_in;
END ;
SQL> select j2('qaa@adp') from dual;
J2('QAA@ADP')
('BASE18','SDK1TEST','SEETHA1CONFIG','BASE09','KAREN2','SIVACONFIG','BASE19','SD
K1CTEST','VASU1','KAREN5','EVENTS1CTEST','SDK1','ADA1CONFIG','BASE10','VRB1CONFI
G','CRU2CONFIG','BASE20','SIVATEST','PCOMCONFIG','KP1CONFIG','KAREN4CONFIG','EVE
NTS1TEST','SUZ3CONFIG','DONG2CONFIG','ED2CONFIG','SIVACTEST','APDCONFIG','EVENTS
1CONFIG','ESSCONFIG','SIVA','SDK2CONFIG','ED3CONFIG','RAJ4CONFIG','CBRCONFIG','N
AMRATA2CONFIG','EMIL1','NAMRATA1CONFIG','SDK2CTEST','BVT2CONFIG','MURUGAN1CONFIG
','COB1CONFIG','GABY1TEST','CHR1CONFIG','ED4CONFIG','USE1CONFIG','SDK2TEST','DEM
O1CONFIG','BERNIE1CONFIG','XA1','CAR2TEST','SDK2','ED5CONFIG','PAY1TEST','PAYXCO
NFIG','KP1TEST','SEAN1CONFIG','CAR2CTEST','VASU1CONFIG','SEAN2CONFIG','KP1CTEST'
,'MAU1CONFIG','CONWCONFIG','PAN1CONFIG','MERAJ2','PRA3CONFIG','SEAN5CONFIG','KP1
','PRA4CONFIG','CAR2CONFIG','PRA2CONFIG','SEAN6CONFIG','PRA3TEST','RPT','GABY1CT
EST','SDK3CONFIG','PRA2TEST','SEAN9CONFIG','CAR2','LV1CONFIG','PRA3CTEST','DONG1
CONFIG','TE1CONFIG','MERAJ2CONFIG','VIV1CONFIG','GABY1','SEAN2','PRA2CTEST','PRA
3','RPTCONFIG','PRA4CTEST','SEAN3','MITA1CONFIG','PRA2','RPTCTEST','PCOM1CONFIG'
,'SS2CONFIG','PAY1CONFIG','SEAN7','ANNCONFIG','BASE11','BASE02','LV2CONFIG','RPT
TEST','IMPECONFIG','SUR1CONFIG','SREEK2CONFIG','BASE03','SRINU3CONFIG','BDCONFIG
','JAY1CONFIG','AMMAN1','PRA1TEST','WPGCONFIG','BASE12','MP5CONFIG','MERAJ1','SR
INU2CONFIG','XA1CONFIG','RAJ1CONFIG','WPGCTEST','BASE04','CHRIS','RAJSCONFIG','P
ANKAJ','BASE13','WPGTEST','RAJ3CONFIG','WPG','BASE14','VASU2CONFIG','SRINU1CONFI
G','BASE05','PRA4TEST','VASU1TEST','PRA5CONFIG','NISH1CONFIG','CHRISCONFIG','SDK
3TEST','RAJ3TEST','KP2CONFIG','BASE06','DEFPCONFIG','NISH2CONFIG','CHRISCTEST','
WPSCONFIG','VASU2TEST','BASE15','GABY1CONFIG','PRA5TEST','MITA2CONFIG','BASE07',
'VASU1CTEST','KP2TEST','VASU2CTEST','LAURA3CONFIG','BASE16','CHRISTEST','WPSTEST
','VASU2','KP2CTEST','EVENTS1','BASE17','RAJ2CONFIG','WPSCTEST','BASE08','SREEK1
CONFIG','ADVE','PRA4','SDK1CONFIG','KP2','KAREN1','CRU1CONFIG','WPS')
Now if i put the results (cut and paste )in the query it gives me the results
SQL> select count(*) from baseclient.address_detail where cidn in ('BASE18','SDK1TEST','SEETHA1CONFIG','BASE09','KAREN2','SIVACONFIG','BASE19','SD
2 K1CTEST','VASU1','KAREN5','EVENTS1CTEST','SDK1','ADA1CONFIG','BASE10','VRB1CONFI
3 G','CRU2CONFIG','BASE20','SIVATEST','PCOMCONFIG','KP1CONFIG','KAREN4CONFIG','EVE
4 NTS1TEST','SUZ3CONFIG','DONG2CONFIG','ED2CONFIG','SIVACTEST','APDCONFIG','EVENTS
5 1CONFIG','ESSCONFIG','SIVA','SDK2CONFIG','ED3CONFIG','RAJ4CONFIG','CBRCONFIG','N
6 AMRATA2CONFIG','EMIL1','NAMRATA1CONFIG','SDK2CTEST','BVT2CONFIG','MURUGAN1CONFIG
7 ','COB1CONFIG','GABY1TEST','CHR1CONFIG','ED4CONFIG','USE1CONFIG','SDK2TEST','DEM
O1CONFIG','BERNIE1CONFIG','XA1','CAR2TEST','SDK2','ED5CONFIG','PAY1TEST','PAYXCO
8 9 NFIG','KP1TEST','SEAN1CONFIG','CAR2CTEST','VASU1CONFIG','SEAN2CONFIG','KP1CTEST'
10 ,'MAU1CONFIG','CONWCONFIG','PAN1CONFIG','MERAJ2','PRA3CONFIG','SEAN5CONFIG','KP1
11 ','PRA4CONFIG','CAR2CONFIG','PRA2CONFIG','SEAN6CONFIG','PRA3TEST','RPT','GABY1CT
12 EST','SDK3CONFIG','PRA2TEST','SEAN9CONFIG','CAR2','LV1CONFIG','PRA3CTEST','DONG1
13 CONFIG','TE1CONFIG','MERAJ2CONFIG','VIV1CONFIG','GABY1','SEAN2','PRA2CTEST','PRA
14 3','RPTCONFIG','PRA4CTEST','SEAN3','MITA1CONFIG','PRA2','RPTCTEST','PCOM1CONFIG'
15 ,'SS2CONFIG','PAY1CONFIG','SEAN7','ANNCONFIG','BASE11','BASE02','LV2CONFIG','RPT
16 TEST','IMPECONFIG','SUR1CONFIG','SREEK2CONFIG','BASE03','SRINU3CONFIG','BDCONFIG
17 ','JAY1CONFIG','AMMAN1','PRA1TEST','WPGCONFIG','BASE12','MP5CONFIG','MERAJ1','SR
18 INU2CONFIG','XA1CONFIG','RAJ1CONFIG','WPGCTEST','BASE04','CHRIS','RAJSCONFIG','P
19 ANKAJ','BASE13','WPGTEST','RAJ3CONFIG','WPG','BASE14','VASU2CONFIG','SRINU1CONFI
20 G','BASE05','PRA4TEST','VASU1TEST','PRA5CONFIG','NISH1CONFIG','CHRISCONFIG','SDK
21 3TEST','RAJ3TEST','KP2CONFIG','BASE06','DEFPCONFIG','NISH2CONFIG','CHRISCTEST','
22 WPSCONFIG','VASU2TEST','BASE15','GABY1CONFIG','PRA5TEST','MITA2CONFIG','BASE07',
23 'VASU1CTEST','KP2TEST','VASU2CTEST','LAURA3CONFIG','BASE16','CHRISTEST','WPSTEST
24 ','VASU2','KP2CTEST','EVENTS1','BASE17','RAJ2CONFIG','WPSCTEST','BASE08','SREEK1
25 CONFIG','ADVE','PRA4','SDK1CONFIG','KP2','KAREN1','CRU1CONFIG','WPS');
COUNT(*)
228
BUT if I user the function it gives me no results
0 rows selected and its taking a loon time to reurn

Answer 1

This appears to be a duplicate of the question in this thread
Re: VPD issue Need Assistance ASAP
where I wrote
"Your function returns a single string that happens to have a bunch of commas and quotes in it. An IN list generally requires a list of strings, which your function doesn't return.
You could rewrite the function to be a pipelined table function and then do
select count(*)
from baseclient.address_detail
where cidn in (SELECT cidn
FROM TABLE(<<your pipelined table function>>))
However, I would expect it to be easier not to wrap all this into a function and just have your IN clause be the logic in your predicate_cidn cursor.
Justin
"