Cursors are not closed when using Ref Cursor Query in a report ORA-01000

Question

Dear Experts
Oracel database 11g,
developer suite 10.1.2.0.2,
application server 10.1.2.0.2,
Windows xp platform
For a long time, I'm hitting ORA-01000
I have a 2 group report (master and detail) using Ref Cusor query, when this report is run, I found that it opens several cursors (should be only one cursor) for the detail query although it should not, I found that the number of these cursors is equal to the number of master records.
Moreover, after the report is finished, these cursors are not closed, and they are increasing cumulatively each time I run the report, and finally the maximum number of open cursors is exceeded, and thus I get ORA-01000.
I increased the open cursors parameter for the database to an unbeleivable value 30000, but of course it will be exceeded during the session because the cursors are increasing cumulatively.
I Found that this problem is solved when using only one master Ref Cursor Query and create a breake group, the problem is solved also if we use SQL Query instead of Ref Query for the master and detail queries, but for some considerations, I should not use neither breake group nor SQL Query, I have to use REF Cursor queries.
Is this an oracle bug , and how can I overcome ?
Thanks
Edited by: Mostafa Abolaynain on May 6, 2012 9:58 AM

Answer 1

Thank you Inol for your answer, However
Ref Cursor give me felxibility to control the query, for example see the following query :
function QR_1RefCurDS return DEF_CURSORS.JOURHEAD_REFCUR is
temp_JOURHEAD DEF_CURSORS.JOURHEAD_refcur;
          v_from_date DATE;
          v_to_date DATE;
          V_SERIAL_TYPE number;
begin
SELECT SERIAL_TYPE INTO V_SERIAL_TYPE
FROM ACC_VOUCHER_TYPES
where voucher_type='J'
and IDENT_NO=:IDENT
AND COMP_NO=TO_NUMBER(:COMPANY_NO);
     IF :no_date=1 then
               IF V_SERIAL_TYPE =1 THEN     
               open temp_JOURHEAD for select VOCH_NO, VOCH_DATE
               FROM JOURHEAD
               WHERE COMP_NO=TO_NUMBER(:COMPANY_NO)
               AND IDENT=:IDENT
          AND ((TO_NUMBER(VOCH_NO)=:FROM_NO and :FROM_NO IS NOT NULL AND :TO_NO IS NULL)
          OR (TO_NUMBER(VOCH_NO) BETWEEN :FROM_NO AND :TO_NO and :FROM_NO IS NOT NULL AND :TO_NO IS NOT NULL )
          OR (TO_NUMBER(VOCH_NO)<=:TO_NO and :FROM_NO IS NULL AND :TO_NO IS NOT NULL )
          OR (:FROM_NO IS NULL AND :TO_NO IS NULL ))
               ORDER BY TO_NUMBER(VOCH_NO);
               ELSE
               open temp_JOURHEAD for select VOCH_NO, VOCH_DATE
               FROM JOURHEAD
               WHERE COMP_NO=TO_NUMBER(:COMPANY_NO)
               AND IDENT=:IDENT               
          AND ((VOCH_NO=:FROM_NO and :FROM_NO IS NOT NULL AND :TO_NO IS NULL)
          OR (VOCH_NO BETWEEN :FROM_NO AND :TO_NO and :FROM_NO IS NOT NULL AND :TO_NO IS NOT NULL )
          OR (VOCH_NO<=:TO_NO and :FROM_NO IS NULL AND :TO_NO IS NOT NULL )
          OR (:FROM_NO IS NULL AND :TO_NO IS NULL ))     
               ORDER BY VOCH_NO;          
               END IF;
     ELSE
               v_from_date:=to_DATE(:from_date);
               v_to_date:=to_DATE(:to_date);                         
          IF V_SERIAL_TYPE =1 THEN
               open temp_JOURHEAD for select VOCH_NO, VOCH_DATE
               FROM JOURHEAD
               WHERE COMP_NO=TO_NUMBER(:COMPANY_NO)
          AND IDENT=:IDENT                         
               AND ((voch_date between v_from_date and v_to_date and :from_date is not null and :to_date is not null)
               OR (voch_date <= v_to_date and :from_date is null and :to_date is not null)
               OR (voch_date = v_from_date and :from_date is not null and :to_date is null)
               OR (:from_date is null and :to_date is null ))     
               ORDER BY VOCH_DATE,TO_NUMBER(VOCH_NO);     
          ELSE
               open temp_JOURHEAD for select VOCH_NO, VOCH_DATE
               FROM JOURHEAD
               WHERE COMP_NO=TO_NUMBER(:COMPANY_NO)
               AND IDENT=:IDENT                         
          AND ((voch_date between v_from_date and v_to_date and :from_date is not null and :to_date is not null)
               OR (voch_date <= v_to_date and :from_date is null and :to_date is not null)
               OR (voch_date = v_from_date and :from_date is not null and :to_date is null)
               OR (:from_date is null and :to_date is null ))     
               ORDER BY VOCH_DATE,VOCH_NO;          
          END IF;
     END IF;               
     return temp_JOURHEAD;
end;