Procedure error with cursor

Question

I am creating a procedure to update the value (unique id) using cursor.the result is not what i want, it is updating all the rows,it seems that
where current of is not working in " WHERE CURRENT OF CUR_CPN;"
Declare
CURSOR CUR_CPN IS
     SELECT * FROM CPN_MASTER_TEMP FOR UPDATE;
     VAL NUMBER(5);
     UNI_VAL NUMBER(15);
BEGIN
     FOR R1 IN CUR_CPN
LOOP
          SELECT ZONE_DETAILS_DATA.UTM_ZONE,ZONE_DETAILS_DATA.UNIQUE_ID INTO VAL,UNI_VAL FROM ZONE_DETAILS_DATA;
          --SELECT ZONE_DETAILS_DATA.UTM_ZONE INTO VAL FROM ZONE_DETAILS_DATA;
          --SELECT ZONE_DETAILS_DATA.UNIQUE_ID INTO UNI_VAL FROM ZONE_DETAILS_DATA;     
     IF R1.UTM_ZONE=VAL THEN
          UPDATE CPN_MASTER_TEMP SET ZONE_DETAIL_ID_TEMP=UNI_VAL WHERE CURRENT OF CUR_CPN;
     END IF;
     END LOOP;
END;
output is as follows
SQL> SELECT ZONE_DETAIL_ID_TEMP FROM CPN_MASTER_TEMP;
ZONE_DETAIL_ID_TEMP
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
20 rows selected.
the output should be only for rows where uniqueid is existing, now it is updating all rows
please suggest help
thankx

Answer 1

select the rows only you want to update in cursor select condition
Edited by: 781237 on Jul 10, 2010 4:45 AM