Want to remove iteration in this query

Question

below mention query is showing results ok but problem is i have used iteration due to this it will slow down many many times if no. of transactions increases
can i use this query without iteration please help me out?
select
SNO,NDATE,SERIALNO,LOCATIONCODE,IORTYPE,TRNTYPE,CAPITALIZE,QTYRATE,ACCESSORYCODE,QTY,RATE,AMOUNT "AMT",C_QTY "RUNQTY",AVG_RATE "RUNRATE",C_AMOUNT "RUNAMT"
from ( select * from ( select t.*, max(dim) over () number_of_iterations,
max(dim) over (partition by accessorycode) number_of_item_codes
from ( select t.*, row_number() over (partition by ACCESSORYCODE order by SNO) - 1 dim
from DENIM.V_RUNAVG1 t) t)
model partition by (accessorycode)
dimension by (dim)
measures (SNO,NDATE,SERIALNO,LOCATIONCODE,IORTYPE,TRNTYPE,CAPITALIZE,QTYRATE,QTY,RATE,AMOUNT,0 as C_QTY,0 as AVG_RATE,0 as C_AMOUNT, number_of_iterations,number_of_item_codes) rules iterate (10) until iteration_number >= number_of_iterations[1] ( rate[iteration_number] = case when iteration_number > 0 and qtyrate[iteration_number] < 0 then avg_rate[iteration_number - 1] else rate[iteration_number] end, amount[iteration_number] = qty[iteration_number] * rate[iteration_number], c_amount[iteration_number] = case when iteration_number > 0 then c_amount[iteration_number - 1] + amount[iteration_number] else amount[iteration_number] end, c_qty[iteration_number] = qty[iteration_number] + case when iteration_number > 0 then c_qty[iteration_number - 1] else 0.0000000001 end, avg_rate[iteration_number] = c_amount[iteration_number] / c_qty[iteration_number] )) where dim <= number_of_item_codes order by accessorycode, dim

Answer 1

TKPROF: Release 10.1.0.2.0 - Production on Thu Jun 5 03:35:34 2008
Copyright (c) 1982, 2004, Oracle.  All rights reserved.
Trace file: d:\oracle\product\10.1.0\admin\sd\udump\sd_ora_2420.trc
Sort options: default
count    = number of times OCI procedure was executed
cpu      = cpu time in seconds executing
elapsed  = elapsed time in seconds executing
disk     = number of physical reads of buffers from disk
query    = number of buffers gotten for consistent read
current  = number of buffers gotten in current mode (usually for update)
rows     = number of rows processed by the fetch or execute call
alter session set sql_trace true
call     count       cpu    elapsed       disk      query    current        rows
Parse        0      0.00       0.00          0          0          0           0
Execute      1      0.00       0.04          0          0          0           0
Fetch        0      0.00       0.00          0          0          0           0
total        1      0.00       0.04          0          0          0           0
Misses in library cache during parse: 0
Misses in library cache during execute: 1
Optimizer mode: ALL_ROWS
Parsing user id: 91 
select
SNO,NDATE,SERIALNO,LOCATIONCODE,IORTYPE,TRNTYPE,QTYRATE,ACCESSORYCODE,INVTYPE,
QTY,RATE,AMOUNT
"AMT",C_QTY "RUNQTY",AVG_RATE "RUNRATE",C_AMOUNT "RUNAMT"
from ( select * from ( select t.*, max(dim) over () number_of_iterations,
max(dim) over (partition by accessorycode) number_of_item_codes
from ( select t.*, row_number() over (partition by ACCESSORYCODE order by
SNO) - 1 dim
from DENIM.WGTAVGRATE1 t) t)
model partition by (accessorycode)
dimension by (dim)
measures
(SNO,NDATE,SERIALNO,LOCATIONCODE,IORTYPE,TRNTYPE,INVTYPE,QTYRATE,QTY,RATE,AMOUNT,0
as C_QTY,0 as AVG_RATE,0 as C_AMOUNT,
number_of_iterations,number_of_item_codes) rules iterate (700) until
iteration_number >= number_of_iterations[1] ( rate[iteration_number] = case
when iteration_number > 0 and qtyrate[iteration_number] < 0 then
avg_rate[iteration_number - 1] else rate[iteration_number]      end,
amount[iteration_number]   = qty[iteration_number] * rate[iteration_number],
c_amount[iteration_number] = case when iteration_number > 0 then
c_amount[iteration_number - 1] + amount[iteration_number] else
amount[iteration_number] end, c_qty[iteration_number] =
qty[iteration_number] + case when iteration_number > 0 then
c_qty[iteration_number - 1] else 0.0000000001   end,
avg_rate[iteration_number] = c_amount[iteration_number] /
c_qty[iteration_number]   )) where dim <= number_of_item_codes order by
accessorycode, dim
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.02          0          0          0           0
Execute      1      0.00       0.01          0          0          0           0
Fetch     2169    127.60     166.60       1244        382          0       32516
total     2171    127.60     166.65       1244        382          0       32516
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 91 
Rows     Row Source Operation
  32516  SORT ORDER BY (cr=382 pr=1244 pw=868 time=166423096 us)
  32516   VIEW  (cr=382 pr=1244 pw=868 time=23883740 us)
2516500    SQL MODEL ORDERED FAST (cr=382 pr=1244 pw=868 time=36303648 us)
  32516     VIEW  (cr=382 pr=376 pw=0 time=3313485 us)
  32516      WINDOW BUFFER (cr=382 pr=376 pw=0 time=3183412 us)
  32516       VIEW  (cr=382 pr=376 pw=0 time=3096441 us)
  32516        WINDOW SORT (cr=382 pr=376 pw=0 time=2933851 us)
  32516         VIEW  (cr=382 pr=376 pw=0 time=2877298 us)
  32516          SORT ORDER BY (cr=382 pr=376 pw=0 time=2747228 us)
  32516           HASH JOIN  (cr=382 pr=376 pw=0 time=1891717 us)
  14134            TABLE ACCESS FULL OBJ#(57651) (cr=206 pr=203 pw=0 time=111724 us)
  32516            TABLE ACCESS FULL OBJ#(57650) (cr=176 pr=173 pw=0 time=195574 us)
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.02          0          0          0           0
Execute      2      0.00       0.05          0          0          0           0
Fetch     2169    127.60     166.60       1244        382          0       32516
total     2172    127.60     166.69       1244        382          0       32516
Misses in library cache during parse: 1
Misses in library cache during execute: 1
OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS
call     count       cpu    elapsed       disk      query    current        rows
Parse        2      0.00       0.00          0          0          0           0
Execute      2      0.00       0.01          0          0          0           0
Fetch        2      0.00       0.00          0          4          0           1
total        6      0.00       0.01          0          4          0           1
Misses in library cache during parse: 2
Misses in library cache during execute: 2
    2  user  SQL statements in session.
    2  internal SQL statements in session.
    4  SQL statements in session.
Trace file: d:\oracle\product\10.1.0\admin\sd\udump\sd_ora_2420.trc
Trace file compatibility: 10.01.00
Sort options: default
       2  sessions in tracefile.
       2  user  SQL statements in trace file.
       2  internal SQL statements in trace file.
       4  SQL statements in trace file.
       4  unique SQL statements in trace file.
    4740  lines in trace file.
     298  elapsed seconds in trace file.