Query taking 6mins to execute wityh order by clause, 3secs without orderby

Question

Dear All,
The below query is taking nearly 6minutes time to execute (as i have order by clause in the query)
/* Formatted on 2007/09/26 10:03 (Formatter Plus v4.8.0) */
SELECT (SELECT DISTINCT grndate
FROM fs_lg_grnhdr
WHERE grnid = pl.grnid AND custwhid = pl.custwhid)
grndate,
pl.grnid,
(SELECT DISTINCT vi.orderno
FROM fs_lg_vendorinvoicehdr vi, fs_lg_grndtl gd
WHERE gd.vendorinvoiceid = vi.vendorinvoiceid
AND gd.custwhid = vi.custwhid
AND gd.custwhid = pl.custwhid
AND gd.grnid = pl.grnid
AND gd.partid = pl.partid) orderno,
pl.expirydate, pl.batchno, pl.packuom,
NVL (pl.receiptqty, 0) receiptqty, pl.putawayid, pl.lineno,
(SELECT customscontrolno
FROM fs_lg_putawaydtl
WHERE custwhid = pl.custwhid
AND putawayid = pl.putawayid
AND partid = pl.partid
AND locationto = pl.locationid) cctrlno,
(SELECT customspermitno
FROM fs_lg_putawayhdr
WHERE custwhid = pl.custwhid
AND putawayid = pl.putawayid) cpermitno,
(SELECT SUM (pdtl.pickqty)
FROM fs_lg_pickticketdtl pdtl,
fs_lg_picktickethdr phdr
WHERE pdtl.custwhid = pl.custwhid
AND pdtl.putawayid = pl.putawayid
AND pdtl.putawaylineno = pl.lineno
AND phdr.custwhid = pdtl.custwhid
AND phdr.pickticketid = pdtl.pickticketid
AND phdr.pickdate < '01-SEP-2007'
AND pdtl.status = 'CM') previousoutqty,
(SELECT SUM (pdtl.pickqty)
FROM fs_lg_pickticketdtl pdtl,
fs_lg_picktickethdr phdr
WHERE pdtl.custwhid = pl.custwhid
AND pdtl.putawayid = pl.putawayid
AND pdtl.putawaylineno = pl.lineno
AND phdr.custwhid = pdtl.custwhid
AND phdr.pickticketid = pdtl.pickticketid
AND phdr.pickdate BETWEEN '01-SEP-2007'
AND '25-SEP-2007'
AND pdtl.status = 'CM') presentoutqty,
NVL ((SELECT SUM (qty)
FROM fs_lg_internaltransdtl
WHERE putawayid = pl.putawayid
AND fromputawaylineno = pl.lineno
AND custwhid = pl.custwhid),
0
) toistqty,
NVL ((SELECT SUM (qty)
FROM fs_lg_internaltransdtl
WHERE custwhid = pl.custwhid
AND putawayid = pl.putawayid
AND slno = pl.lineno),
0
) fromistqty
FROM fs_lg_partloads pl
WHERE pl.partid = '2ERCH-2022'
AND pl.custwhid = 'RNH-CSM'
AND inventoryflag IN ('AVAIL','')
AND pl.status = 'CM'
AND pl.grndate <= '25-SEP-2007'
ORDER BY grndate, pl.grnid, pl.putawayid, pl.lineno;
But when i don't use the order by clause it is executing within 3 seconds. But i need to get the output in the sorted order as shown in the order by clause.
Is there any way to avoid order by clause and to get the same output as with order by clasue, and i need to execute the query with less time.
Please help me in this.
Thanks in advance
Mahi

Answer 1

Dear Alok Kumar,
When i execute sql>set autotrace traceonly statistics ;
I am getting the below errors...
SP2-0618: Cannot find the Session Identifier. Check PLUSTRACE role is enabled
SP2-0611: Error enabling STATISTICS report
What could be the problem, how to resolve this to get the statistics?
But when i use sql>set autotrace traceonly explain; i got the below output for the above query..
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE
1 0 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_GRNHDR'
2 1 INDEX (UNIQUE SCAN) OF 'SYS_C00293078' (UNIQUE)
3 0 SORT (UNIQUE)
4 3 NESTED LOOPS
5 4 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_GRNDTL'
6 5 INDEX (RANGE SCAN) OF 'SYS_C00293075' (UNIQUE)
7 4 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_VENDORINVOICEH
DR'
8 7 INDEX (UNIQUE SCAN) OF 'PK_VENDORINVOICE' (UNIQUE)
9 0 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_PUTAWAYDTL'
10 9 INDEX (UNIQUE SCAN) OF 'SYS_C00293260' (UNIQUE)
11 0 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_PUTAWAYHDR'
12 11 INDEX (UNIQUE SCAN) OF 'SYS_C00293263' (UNIQUE)
13 0 SORT (AGGREGATE)
14 13 NESTED LOOPS
15 14 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_PICKTICKETDTL'
16 15 INDEX (RANGE SCAN) OF 'F_L_P_CWI_IND1' (NON-UNIQUE)
17 14 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_PICKTICKETHDR'
18 17 INDEX (UNIQUE SCAN) OF 'SYS_C00293202' (UNIQUE)
19 0 SORT (AGGREGATE)
20 19 NESTED LOOPS
21 20 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_PICKTICKETDTL'
22 21 INDEX (RANGE SCAN) OF 'F_L_P_CWI_IND1' (NON-UNIQUE)
23 20 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_PICKTICKETHDR'
24 23 INDEX (UNIQUE SCAN) OF 'SYS_C00293202' (UNIQUE)
25 0 SORT (AGGREGATE)
26 25 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_INTERNALTRANSDTL
27 26 INDEX (RANGE SCAN) OF 'PK_INTERNALTRANSDTL' (UNIQUE)
28 0 SORT (AGGREGATE)
29 28 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_INTERNALTRANSDTL
30 29 INDEX (RANGE SCAN) OF 'PK_INTERNALTRANSDTL' (UNIQUE)
31 0 SORT (ORDER BY)
32 31 TABLE ACCESS (BY INDEX ROWID) OF 'FS_LG_PARTLOADS'
33 32 INDEX (RANGE SCAN) OF 'PK_PARTLOADS' (UNIQUE)
Please advice me regarding this...
Thanks in advance
Mahi