ayuda con SQL

Amigos,

Ayudenme con SQL, por favor

Tengo este SQL que estoy usando DECODE y la verdad es que
no funciona, alguien de la comunidad me pude ayudar, me
arroja el siguiente mensaje

ORA-0095 Falta expresion clave

El SQL es el siguiente :

PO_VENDORS.VENDOR_NAME NOMBRE ,
PO_VENDORS.SEGMENT1 RUT ,
FND_LOOKUP_VALUES_VL.MEANING RUBRO ,
DECODE(TO_CHAR(INVOICE_DATE,'YYYY'),'2003' ,
SUM(TO_NUMBER(AP_INVOICES_ALL.INVOICE_AMOUNT) ))
TOTAL_2003,
DECODE(TO_CHAR(INVOICE_DATE,'YYYY'),'2002' ,
SUM(TO_NUMBER(AP_INVOICES_ALL.INVOICE_AMOUNT) ))
TOTAL_2002
FROM
AP.AP_INVOICES_ALL AP_INVOICES_ALL,
PO.PO_VENDORS PO_VENDORS,
APPS.FND_LOOKUP_VALUES_VL FND_LOOKUP_VALUES_VL,
AP.AP_INVOICE_PAYMENTS_ALL AP_INVOICE_PAYMENTS_ALL,
PO.PO_VENDOR_SITES_ALL PO_VENDOR_SITES_ALL
WHERE
( AP_INVOICES_ALL.VENDOR_ID > PO_VENDORS.VENDOR_ID ) AND
( PO_VENDORS.VENDOR_TYPE_LOOKUP_CODE > FND_LOOKUP_VALUES_VL.LOOKUP_CODE ) AND
( AP_INVOICES_ALL.INVOICE_ID > AP_INVOICE_PAYMENTS_ALL.INVOICE_ID ) AND
( AP_INVOICES_ALL.VENDOR_SITE_ID > PO_VENDOR_SITES_ALL.VENDOR_SITE_ID ) AND
( FND_LOOKUP_VALUES_VL.LOOKUP_TYPE = 'VENDOR
TYPE' ) AND
( PO_VENDOR_SITES_ALL.VENDOR_SITE_CODE
= 'FACTURA' ) OR
( PO_VENDOR_SITES_ALL.VENDOR_SITE_CODE = 'FACTURA
SALON' ) OR
( PO_VENDOR_SITES_ALL.VENDOR_SITE_CODE
= 'ANTICIPO' ) AND
( AP_INVOICE_PAYMENTS_ALL.AMOUNT > 0 )

AND
TO_CHAR(INVOICE_DATE) BETWEEN '01/01/02'
OR '31/12/03'

HAVING ( SUM(AP_INVOICES_ALL.INVOICE_AMOUNT) = SUM
(AP_INVOICES_ALL.INVOICE_AMOUNT ) )
GROUP BY
FND_LOOKUP_VALUES_VL.MEANING ,
PO_VENDORS.VENDOR_NAME ,
PO_VENDORS.SEGMENT1
ORDER BY
FND_LOOKUP_VALUES_VL.MEANING ASC,
PO_VENDORS.VENDOR_NAME ASC,
PO_VENDORS.SEGMENT1 ASC