Slow query with Oracle 10G

Hi,

During the last month, we have promote version of Oracle server 9i to 10g. A cursor is very slow since the 10g version. This cursor uses much NVL function to retrieve information.

I would like know if the function NVL can be used in Oracle 10g? Do there exist operational limits of function NVL? Does function NVL slow down the speed of execution?

Here the defintion of Cursor:

CURSOR Cur_Request IS

   SELECT *
   FROM TABLE1
   WHERE FIELD1 = NVL(p_no_inter_relie, p_no_inter)

	 AND FIELD2 >= p_dt_deb_extrac
	 AND FIELD3 <= p_dt_fin_extrac
	 AND NVL(FIELD4,'0') = NVL( FIELD12, NVL(FIELD4,'0'))
	 AND NVL(FIELD5,'0') = NVL( FIELD13, NVL(FIELD5,'0'))
	 AND NVL(FIELD6,0) = NVL( FIELD14, NVL(FIELD6,0))
	 AND NVL(FIELD7,'0') = NVL( FIELD15, NVL(FIELD7,'0'))
	 AND NVL(FIELD8,'0') = NVL( FIELD16, NVL(FIELD8,'0'))
	 AND NVL(FIELD9,'0') = NVL( FIELD17, NVL(FIELD9,'0'))
	 AND NVL(FIELD10,'0') = NVL( FIELD18, NVL(FIELD10,'0'))
	 AND NVL(FIELD11,'@') = NVL( FIELD19,NVL(FIELD11,'@'));

Thanks Received on Tue Aug 21 2007 - 08:49:50 CDT