Some question about Data Services 4.1 SQL Function

hi... all

i have some question about SQL function in ds 4.1 .

i use sql function for update but performance issue become.

so i'm add Oracle Hint. this hint in sql_plus running fast

but not solved performance issue..........

i think hint is not working in DS...

i hope some help plz

SQL('DS_HDWDMCOM','MERGE INTO /*+ USE_HASH(TGT SRC) */

                               [$cTblName] TGT

                         USING HDWDWCOM.DSCOM_EQUIP_MST SRC

                            ON (TGT.SYSTEM_ID      = SRC.SYSTEM_ID

                           AND TGT.UNLOADING_POINT = SRC.EQUIP_ID

                           AND TGT.MVMT_TYPE_ID NOT IN (\'261\',\'262\'))

                         WHEN MATCHED THEN

                           UPDATE SET TGT.EQUIP_DESC = SRC.EQUIP_DESC');

thanks all