Explain plan different with no stats but with no rows & rows in a table
Hi All,
This is in Oracle 8.1.7.4.0 DB.
1. Query was taking long time to return rows. It was based on a view.
2. View has multiple tables.
3. The explain plan was showing one of the Table(e.g. TABLE1) using incorrect INDEX. At the time of explain plan table has no statistics.
4. truncated Table TABLE1
5. The explain plan now taking correct INDEX for the table TABLE1.
How does optimizer choosing the incorrect index when rows in a table & correct index when there are no rows in the table ?
any insights.
Thanks
Sandeep
I don't know about your particular db version, but CBO in absence of statistics uses some default values (e.g. average row length 100 bytes) and also uses actual number of block for the table. I assume something similar might be for indexes.
To be sure what has changed you can run 10053 level trace.
Gints Plivna
http://www.gplivna.eu
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The below same query runs fast at PL/SQL , while the same query run from front end (EBS R 12.0.4) using concurrent request runs verl slow , both has diffrent plan , please share some thought.
Below query when i run from backend (PL/SQL Developer) it returns row within a second
SELECT /*+ gather_plan_statistics product_item_2.txt */ OH.ORG_ID,BUNIT.BU_ID,OL.INVENTORY_ITEM_ID,CUST.account_number,CUST.ACCOUNT_NAME,CUST.CUSTOMER_CLASS_CODE,
NVL(SUM(OL.FULFILLED_QUANTITY),0) as sale_qty
FROM
OE_ORDER_HEADERS_ALL OH,OE_ORDER_LINES_ALL OL,
HZ_CUST_ACCOUNTS CUST,mtl_categories_vl CAT,
mtl_item_categories IC,(select FLEX_VALUE BU_ID,DESCRIPTION B_NAME from fnd_flex_values_vl t
where t.FLEX_VALUE_SET_ID ='1012990') BUNIT
WHERE OH.HEADER_ID = OL.HEADER_ID
AND CUST.CUST_ACCOUNT_ID =
(SELECT DISTINCT ACCT.CUST_ACCOUNT_ID
FROM HZ_CUST_ACCOUNTS ACCT,HZ_CUST_ACCT_SITES_ALL ACCT_SITE,
HZ_LOCATIONS LOC,HZ_PARTY_SITES PARTY_SITE,
HZ_CUST_SITE_USES_ALL SUSE,HZ_PARTIES P
WHERE ACCT.PARTY_ID = PARTY_SITE.PARTY_ID
AND ACCT.CUST_ACCOUNT_ID = ACCT_SITE.CUST_ACCOUNT_ID
AND SUSE.CUST_ACCT_SITE_ID = ACCT_SITE.CUST_ACCT_SITE_ID
AND ACCT_SITE.PARTY_SITE_ID = PARTY_SITE.PARTY_SITE_ID
AND LOC.LOCATION_ID = PARTY_SITE.LOCATION_ID
AND SUSE.SITE_USE_ID = OL.SHIP_TO_ORG_ID
AND P.PARTY_ID = ACCT.PARTY_ID
AND P.PARTY_ID = PARTY_SITE.PARTY_ID
AND SUSE.SITE_USE_CODE = 'SHIP_TO'
AND ACCT_SITE.ORG_ID = &P_ORG_ID
AND OH.ORG_ID = &P_ORG_ID
AND OL.ACTUAL_SHIPMENT_DATE BETWEEN &P_FROM_DATE AND &P_TO_DATE
AND OL.UNIT_SELLING_PRICE != 0
AND OL.LINE_CATEGORY_CODE = 'ORDER'
AND OL.ORDERED_ITEM = NVL(&ITEM_HIGH, OL.ORDERED_ITEM)
AND BUNIT.BU_ID = nvl(&p_business_unit,bunit.bu_id)
AND CAT.CATEGORY_ID = IC.CATEGORY_ID
AND CAT.STRUCTURE_ID = 50289
AND IC.INVENTORY_ITEM_ID = OL.INVENTORY_ITEM_ID
AND IC.ORGANIZATION_ID = OH.SHIP_FROM_ORG_ID
and cat.SEGMENT3 = BUNIT.BU_ID
GROUP BY
OH.ORG_ID,BUNIT.BU_ID,OL.INVENTORY_ITEM_ID,CUST.account_number,CUST.ACCOUNT_NAME,CUST.CUSTOMER_CLASS_CODE
ORDER BY 1Plan for above query is as follows
SQL> set pagesize 1000
SQL> /
PLAN_TABLE_OUTPUT
SQL_ID 5g71mvqaat8x3, child number 0
Plan hash value: 610424373
| Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | OMem | 1Mem | Used-Mem |
| 1 | HASH GROUP BY | | 1 | 1 | 2 |00:00:00.64 | 144K| | | |
| 2 | NESTED LOOPS | | 1 | 1 | 71 |00:00:00.30 | 144K| | | |
| 3 | NESTED LOOPS | | 1 | 1 | 1704 |00:00:00.26 | 138K| | | |
|* 4 | HASH JOIN | | 1 | 1 | 3312 |00:00:00.05 | 132K| 887K| 887K| 1236K (0)|
| 5 | TABLE ACCESS BY INDEX ROWID | MTL_ITEM_CATEGORIES | 1 | 506 | 1075 |00:00:00.02 | 361 | | | |
| 6 | NESTED LOOPS | | 1 | 1 | 1077 |00:00:00.04 | 24 | | | |
| 7 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 19 | | | |
| 8 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 18 | | | |
| 9 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 15 | | | |
|* 10 | TABLE ACCESS BY INDEX ROWID | FND_FLEX_VALUES | 1 | 1 | 1 |00:00:00.01 | 13 | | | |
|* 11 | INDEX RANGE SCAN | IDX$$_65860003 | 1 | 22 | 52 |00:00:00.01 | 2 | | | |
|* 12 | INDEX UNIQUE SCAN | FND_FLEX_VALUES_TL_U1 | 1 | 1 | 1 |00:00:00.01 | 2 | | | |
|* 13 | TABLE ACCESS BY INDEX ROWID | MTL_CATEGORIES_B | 1 | 1 | 1 |00:00:00.01 | 3 | | | |
|* 14 | INDEX RANGE SCAN | IDX$$_79530001 | 1 | 1 | 2 |00:00:00.01 | 1 | | | |
|* 15 | INDEX UNIQUE SCAN | MTL_CATEGORIES_TL_U1 | 1 | 1 | 1 |00:00:00.01 | 1 | | | |
|* 16 | INDEX RANGE SCAN | IDX$$_78250002 | 1 | 1528 | 1075 |00:00:00.01 | 5 | | | |
|* 17 | TABLE ACCESS BY INDEX ROWID | OE_ORDER_LINES_ALL | 1 | 51 | 138 |00:00:00.01 | 132K| | | |
|* 18 | INDEX SKIP SCAN | OE_ORDER_LINES_N26 | 1 | 14977 | 113K|00:00:00.57 | 1208 | | | |
| 19 | TABLE ACCESS BY INDEX ROWID | HZ_CUST_ACCOUNTS | 3312 | 1 | 1704 |00:00:00.09 | 5188 | | | |
|* 20 | INDEX UNIQUE SCAN | HZ_CUST_ACCOUNTS_U1 | 3312 | 1 | 1704 |00:00:00.04 | 3484 | | | |
| 21 | NESTED LOOPS | | 8 | 1 | 2 |00:00:00.01 | 76 | | | |
| 22 | NESTED LOOPS | | 8 | 1 | 2 |00:00:00.01 | 72 | | | |
| 23 | NESTED LOOPS | | 8 | 1 | 2 |00:00:00.01 | 66 | | | |
| 24 | NESTED LOOPS | | 8 | 1 | 2 |00:00:00.01 | 62 | | | |
| 25 | NESTED LOOPS | | 8 | 1 | 2 |00:00:00.01 | 56 | | | |
|* 26 | TABLE ACCESS BY INDEX ROWID| HZ_CUST_SITE_USES_ALL | 8 | 1 | 8 |00:00:00.01 | 32 | | | |
|* 27 | INDEX UNIQUE SCAN | HZ_CUST_SITE_USES_U1 | 8 | 1 | 8 |00:00:00.01 | 24 | | | |
|* 28 | TABLE ACCESS BY INDEX ROWID| HZ_CUST_ACCT_SITES_ALL | 8 | 25087 | 2 |00:00:00.01 | 24 | | | |
|* 29 | INDEX UNIQUE SCAN | HZ_CUST_ACCT_SITES_U1 | 8 | 1 | 8 |00:00:00.01 | 16 | | | |
| 30 | TABLE ACCESS BY INDEX ROWID | HZ_CUST_ACCOUNTS | 2 | 176K| 2 |00:00:00.01 | 6 | | | |
|* 31 | INDEX UNIQUE SCAN | HZ_CUST_ACCOUNTS_U1 | 2 | 1 | 2 |00:00:00.01 | 4 | | | |
|* 32 | INDEX UNIQUE SCAN | HZ_PARTIES_U1 | 2 | 176K| 2 |00:00:00.01 | 4 | | | |
|* 33 | TABLE ACCESS BY INDEX ROWID | HZ_PARTY_SITES | 2 | 188K| 2 |00:00:00.01 | 6 | | | |
|* 34 | INDEX UNIQUE SCAN | HZ_PARTY_SITES_U1 | 2 | 1 | 2 |00:00:00.01 | 4 | | | |
|* 35 | INDEX UNIQUE SCAN | HZ_LOCATIONS_U1 | 2 | 174K| 2 |00:00:00.01 | 4 | | | |
|* 36 | TABLE ACCESS BY INDEX ROWID | OE_ORDER_HEADERS_ALL | 1704 | 1 | 71 |00:00:00.05 | 6816 | | | |
|* 37 | INDEX UNIQUE SCAN | OE_ORDER_HEADERS_U1 | 1704 | 1 | 1704 |00:00:00.03 | 5112 | | | |
Predicate Information (identified by operation id):
4 - access("IC"."INVENTORY_ITEM_ID"="OL"."INVENTORY_ITEM_ID")
10 - filter("B"."FLEX_VALUE"=NVL('02',"B"."FLEX_VALUE"))
11 - access("B"."FLEX_VALUE_SET_ID"=1012990)
12 - access("B"."FLEX_VALUE_ID"="T"."FLEX_VALUE_ID" AND "T"."LANGUAGE"=USERENV('LANG'))
13 - filter("B"."STRUCTURE_ID"=50289)
14 - access("B"."SEGMENT3"="B"."FLEX_VALUE")
filter("B"."SEGMENT3" IS NOT NULL)
15 - access("B"."CATEGORY_ID"="T"."CATEGORY_ID" AND "T"."LANGUAGE"=USERENV('LANG'))
16 - access("B"."CATEGORY_ID"="IC"."CATEGORY_ID")
17 - filter(("OL"."ORDERED_ITEM"=NVL('101468',"OL"."ORDERED_ITEM") AND "OL"."UNIT_SELLING_PRICE"<>0))
18 - access("OL"."LINE_CATEGORY_CODE"='ORDER' AND "OL"."ACTUAL_SHIPMENT_DATE">=TO_DATE('2012-02-20 00:00:00', 'yyyy-mm-dd hh24:mi:ss') AND
"OL"."ACTUAL_SHIPMENT_DATE"<=TO_DATE('2012-02-23 00:00:00', 'yyyy-mm-dd hh24:mi:ss'))
filter(("OL"."ACTUAL_SHIPMENT_DATE">=TO_DATE('2012-02-20 00:00:00', 'yyyy-mm-dd hh24:mi:ss') AND "OL"."LINE_CATEGORY_CODE"='ORDER'
AND "OL"."ACTUAL_SHIPMENT_DATE"<=TO_DATE('2012-02-23 00:00:00', 'yyyy-mm-dd hh24:mi:ss')))
20 - access("CUST"."CUST_ACCOUNT_ID"=)
26 - filter("SUSE"."SITE_USE_CODE"='SHIP_TO')
27 - access("SUSE"."SITE_USE_ID"=:B1)
28 - filter("ACCT_SITE"."ORG_ID"=142)
29 - access("SUSE"."CUST_ACCT_SITE_ID"="ACCT_SITE"."CUST_ACCT_SITE_ID")
31 - access("ACCT"."CUST_ACCOUNT_ID"="ACCT_SITE"."CUST_ACCOUNT_ID")
32 - access("P"."PARTY_ID"="ACCT"."PARTY_ID")
33 - filter(("ACCT"."PARTY_ID"="PARTY_SITE"."PARTY_ID" AND "P"."PARTY_ID"="PARTY_SITE"."PARTY_ID"))
34 - access("ACCT_SITE"."PARTY_SITE_ID"="PARTY_SITE"."PARTY_SITE_ID")
35 - access("LOC"."LOCATION_ID"="PARTY_SITE"."LOCATION_ID")
36 - filter(("OH"."ORG_ID"=142 AND "IC"."ORGANIZATION_ID"="OH"."SHIP_FROM_ORG_ID"))
37 - access("OH"."HEADER_ID"="OL"."HEADER_ID")
85 rows selected.Below plan for the above same query when i run from front end concurrent request it completed within an hour.
SQL> select * from table(dbms_xplan.display_cursor('1gnb26b0q2vxx',NULL,'ALLSTATS LAST'))
2 /
PLAN_TABLE_OUTPUT
SQL_ID 1gnb26b0q2vxx, child number 0
Plan hash value: 408306916
| Id | Operation | Name | Starts | E-Rows | A-Rows | A-Time | Buffers | OMem | 1Mem | Used-Mem |
| 1 | HASH GROUP BY | | 1 | 1 | 2 |00:36:41.83 | 379M| | | |
| 2 | CONCATENATION | | 1 | | 71 |00:09:30.14 | 379M| | | |
|* 3 | FILTER | | 1 | | 0 |00:00:00.01 | 0 | | | |
| 4 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
| 5 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
|* 6 | HASH JOIN | | 0 | 4 | 0 |00:00:00.01 | 0 | 715K| 715K| |
| 7 | TABLE ACCESS BY INDEX ROWID | MTL_ITEM_CATEGORIES | 0 | 506 | 0 |00:00:00.01 | 0 | | | |
| 8 | NESTED LOOPS | | 0 | 26 | 0 |00:00:00.01 | 0 | | | |
| 9 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
| 10 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
| 11 | NESTED LOOPS | | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
|* 12 | TABLE ACCESS BY INDEX ROWID| FND_FLEX_VALUES | 0 | 22 | 0 |00:00:00.01 | 0 | | | |
|* 13 | INDEX RANGE SCAN | IDX$$_65860003 | 0 | 22 | 0 |00:00:00.01 | 0 | | | |
|* 14 | TABLE ACCESS BY INDEX ROWID| MTL_CATEGORIES_B | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
|* 15 | INDEX RANGE SCAN | MTL_CATEGORIES_B_N3 | 0 | 2 | 0 |00:00:00.01 | 0 | | | |
|* 16 | INDEX UNIQUE SCAN | FND_FLEX_VALUES_TL_U1 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
|* 17 | INDEX UNIQUE SCAN | MTL_CATEGORIES_TL_U1 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
|* 18 | INDEX RANGE SCAN | IDX$$_78250002 | 0 | 1528 | 0 |00:00:00.01 | 0 | | | |
|* 19 | TABLE ACCESS FULL | OE_ORDER_LINES_ALL | 0 | 97 | 0 |00:00:00.01 | 0 | | | |
|* 20 | TABLE ACCESS BY INDEX ROWID | OE_ORDER_HEADERS_ALL | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
|* 21 | INDEX UNIQUE SCAN | OE_ORDER_HEADERS_U1 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
| 22 | TABLE ACCESS BY INDEX ROWID | HZ_CUST_ACCOUNTS | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
|* 23 | INDEX UNIQUE SCAN | HZ_CUST_ACCOUNTS_U1 | 0 | 1 | 0 |00:00:00.01 | 0 | | | |
| 24 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 34 | | | |
| 25 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 30 | | | |
| 26 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 24 | | | |
| 27 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 20 | | | |
| 28 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 14 | | | |
|* 29 | TABLE ACCESS BY INDEX ROWID| HZ_CUST_SITE_USES_ALL | 2 | 1 | 2 |00:00:00.01 | 8 | | | |
|* 30 | INDEX UNIQUE SCAN | HZ_CUST_SITE_USES_U1 | 2 | 1 | 2 |00:00:00.01 | 6 | | | |
|* 31 | TABLE ACCESS BY INDEX ROWID| HZ_CUST_ACCT_SITES_ALL | 2 | 9420 | 2 |00:00:00.01 | 6 | | | |
|* 32 | INDEX UNIQUE SCAN | HZ_CUST_ACCT_SITES_U1 | 2 | 1 | 2 |00:00:00.01 | 4 | | | |
| 33 | TABLE ACCESS BY INDEX ROWID | HZ_CUST_ACCOUNTS | 2 | 176K| 2 |00:00:00.01 | 6 | | | |
|* 34 | INDEX UNIQUE SCAN | HZ_CUST_ACCOUNTS_U1 | 2 | 1 | 2 |00:00:00.01 | 4 | | | |
|* 35 | INDEX UNIQUE SCAN | HZ_PARTIES_U1 | 2 | 176K| 2 |00:00:00.01 | 4 | | | |
|* 36 | TABLE ACCESS BY INDEX ROWID | HZ_PARTY_SITES | 2 | 188K| 2 |00:00:00.01 | 6 | | | |
|* 37 | INDEX UNIQUE SCAN | HZ_PARTY_SITES_U1 | 2 | 1 | 2 |00:00:00.01 | 4 | | | |
|* 38 | INDEX UNIQUE SCAN | HZ_LOCATIONS_U1 | 2 | 174K| 2 |00:00:00.01 | 4 | | | |
|* 39 | FILTER | | 1 | | 71 |00:09:30.14 | 379M| | | |
| 40 | NESTED LOOPS | | 1 | 1 | 71 |00:09:30.14 | 379M| | | |
| 41 | NESTED LOOPS | | 1 | 1 | 71 |00:09:30.11 | 379M| | | |
| 42 | NESTED LOOPS | | 1 | 18 | 16M|00:03:49.48 | 34M| | | |
| 43 | NESTED LOOPS | | 1 | 1 | 1075 |00:00:00.03 | 351 | | | |
| 44 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 9 | | | |
| 45 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 8 | | | |
| 46 | NESTED LOOPS | | 1 | 1 | 1 |00:00:00.01 | 6 | | | |
| 47 | TABLE ACCESS BY INDEX ROWID | FND_FLEX_VALUES | 1 | 1 | 1 |00:00:00.01 | 3 | | | |
|* 48 | INDEX RANGE SCAN | FND_FLEX_VALUES_N4 | 1 | 1 | 1 |00:00:00.01 | 2 | | | |
|* 49 | TABLE ACCESS BY INDEX ROWID | MTL_CATEGORIES_B | 1 | 1 | 1 |00:00:00.01 | 3 | | | |
|* 50 | INDEX RANGE SCAN | IDX$$_79530001 | 1 | 1 | 2 |00:00:00.01 | 1 | | | |
|* 51 | INDEX UNIQUE SCAN | FND_FLEX_VALUES_TL_U1 | 1 | 1 | 1 |00:00:00.01 | 2 | | | |
|* 52 | INDEX UNIQUE SCAN | MTL_CATEGORIES_TL_U1 | 1 | 1 | 1 |00:00:00.01 | 1 | | | |
| 53 | TABLE ACCESS BY INDEX ROWID | MTL_ITEM_CATEGORIES | 1 | 506 | 1075 |00:00:00.02 | 342 | | | |
|* 54 | INDEX RANGE SCAN | IDX$$_78250002 | 1 | 1528 | 1075 |00:00:00.01 | 5 | | | |
|* 55 | TABLE ACCESS BY INDEX ROWID | OE_ORDER_HEADERS_ALL | 1075 | 6485 | 16M|00:12:38.97 | 34M| | | |
|* 56 | INDEX RANGE SCAN | OE_ORDER_HEADER_ALL_ORG_ID_NDX | 1075 | 141K| 394M|00:19:52.50 | 2141K| | | |
|* 57 | TABLE ACCESS BY INDEX ROWID | OE_ORDER_LINES_ALL | 16M| 1 | 71 |00:23:47.72 | 345M| | | |
|* 58 | INDEX RANGE SCAN | OE_ORDER_LINES_N21 | 16M| 6 | 108M|00:08:35.98 | 32M| | | |
| 59 | TABLE ACCESS BY INDEX ROWID | HZ_CUST_ACCOUNTS | 71 | 1 | 71 |00:00:00.01 | 247 | | | |
|* 60 | INDEX UNIQUE SCAN | HZ_CUST_ACCOUNTS_U1 | 71 | 1 | 71 |00:00:00.01 | 176 | | | |
| 61 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 34 | | | |
| 62 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 30 | | | |
| 63 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 24 | | | |
| 64 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 20 | | | |
| 65 | NESTED LOOPS | | 2 | 1 | 2 |00:00:00.01 | 14 | | | |
|* 66 | TABLE ACCESS BY INDEX ROWID| HZ_CUST_SITE_USES_ALL | 2 | 1 | 2 |00:00:00.01 | 8 | | | |
|* 67 | INDEX UNIQUE SCAN | HZ_CUST_SITE_USES_U1 | 2 | 1 | 2 |00:00:00.01 | 6 | | | |
|* 68 | TABLE ACCESS BY INDEX ROWID| HZ_CUST_ACCT_SITES_ALL | 2 | 9420 | 2 |00:00:00.01 | 6 | | | |
|* 69 | INDEX UNIQUE SCAN | HZ_CUST_ACCT_SITES_U1 | 2 | 1 | 2 |00:00:00.01 | 4 | | | |
| 70 | TABLE ACCESS BY INDEX ROWID | HZ_CUST_ACCOUNTS | 2 | 176K| 2 |00:00:00.01 | 6 | | | |
|* 71 | INDEX UNIQUE SCAN | HZ_CUST_ACCOUNTS_U1 | 2 | 1 | 2 |00:00:00.01 | 4 | | | |
|* 72 | INDEX UNIQUE SCAN | HZ_PARTIES_U1 | 2 | 176K| 2 |00:00:00.01 | 4 | | | |
|* 73 | TABLE ACCESS BY INDEX ROWID | HZ_PARTY_SITES | 2 | 188K| 2 |00:00:00.01 | 6 | | | |
|* 74 | INDEX UNIQUE SCAN | HZ_PARTY_SITES_U1 | 2 | 1 | 2 |00:00:00.01 | 4 | | | |
|* 75 | INDEX UNIQUE SCAN | HZ_LOCATIONS_U1 | 2 | 174K| 2 |00:00:00.01 | 4 | | | |
Predicate Information (identified by operation id):
3 - filter((:P_FROM_DATE<=:P_TO_DATE AND :P_BUSINESS_UNIT IS NULL))
6 - access("IC"."INVENTORY_ITEM_ID"="OL"."INVENTORY_ITEM_ID")
12 - filter("B"."FLEX_VALUE" IS NOT NULL)
13 - access("B"."FLEX_VALUE_SET_ID"=1012990)
14 - filter("B"."STRUCTURE_ID"=50289)
15 - access("B"."SEGMENT3"="B"."FLEX_VALUE")
filter("B"."SEGMENT3" IS NOT NULL)
16 - access("B"."FLEX_VALUE_ID"="T"."FLEX_VALUE_ID" AND "T"."LANGUAGE"=USERENV('LANG'))
17 - access("B"."CATEGORY_ID"="T"."CATEGORY_ID" AND "T"."LANGUAGE"=USERENV('LANG'))
18 - access("B"."CATEGORY_ID"="IC"."CATEGORY_ID")
19 - filter(("OL"."ACTUAL_SHIPMENT_DATE">=:P_FROM_DATE AND "OL"."ACTUAL_SHIPMENT_DATE"<=:P_TO_DATE AND
"OL"."ORDERED_ITEM"=NVL(:ITEM_HIGH,"OL"."ORDERED_ITEM") AND "OL"."LINE_CATEGORY_CODE"='ORDER' AND "OL"."UNIT_SELLING_PRICE"<>0))
20 - filter(("OH"."ORG_ID"=:P_ORG_ID AND "IC"."ORGANIZATION_ID"="OH"."SHIP_FROM_ORG_ID"))
21 - access("OH"."HEADER_ID"="OL"."HEADER_ID")
23 - access("CUST"."CUST_ACCOUNT_ID"=)
29 - filter("SUSE"."SITE_USE_CODE"='SHIP_TO')
30 - access("SUSE"."SITE_USE_ID"=:B1)
31 - filter("ACCT_SITE"."ORG_ID"=:P_ORG_ID)
32 - access("SUSE"."CUST_ACCT_SITE_ID"="ACCT_SITE"."CUST_ACCT_SITE_ID")
34 - access("ACCT"."CUST_ACCOUNT_ID"="ACCT_SITE"."CUST_ACCOUNT_ID")
35 - access("P"."PARTY_ID"="ACCT"."PARTY_ID")
36 - filter(("ACCT"."PARTY_ID"="PARTY_SITE"."PARTY_ID" AND "P"."PARTY_ID"="PARTY_SITE"."PARTY_ID"))
37 - access("ACCT_SITE"."PARTY_SITE_ID"="PARTY_SITE"."PARTY_SITE_ID")
38 - access("LOC"."LOCATION_ID"="PARTY_SITE"."LOCATION_ID")
39 - filter((:P_FROM_DATE<=:P_TO_DATE AND :P_BUSINESS_UNIT IS NOT NULL))
48 - access("B"."FLEX_VALUE"=:P_BUSINESS_UNIT AND "B"."FLEX_VALUE_SET_ID"=1012990)
49 - filter("B"."STRUCTURE_ID"=50289)
50 - access("B"."SEGMENT3"="B"."FLEX_VALUE")
filter("B"."SEGMENT3" IS NOT NULL)
51 - access("B"."FLEX_VALUE_ID"="T"."FLEX_VALUE_ID" AND "T"."LANGUAGE"=USERENV('LANG'))
52 - access("B"."CATEGORY_ID"="T"."CATEGORY_ID" AND "T"."LANGUAGE"=USERENV('LANG'))
54 - access("B"."CATEGORY_ID"="IC"."CATEGORY_ID")
55 - filter("IC"."ORGANIZATION_ID"="OH"."SHIP_FROM_ORG_ID")
56 - access("OH"."ORG_ID"=:P_ORG_ID)
57 - filter(("OL"."ACTUAL_SHIPMENT_DATE">=:P_FROM_DATE AND "OL"."ACTUAL_SHIPMENT_DATE"<=:P_TO_DATE AND
"OL"."ORDERED_ITEM"=NVL(:ITEM_HIGH,"OL"."ORDERED_ITEM") AND "OL"."LINE_CATEGORY_CODE"='ORDER' AND "OL"."UNIT_SELLING_PRICE"<>0 AND
"IC"."INVENTORY_ITEM_ID"="OL"."INVENTORY_ITEM_ID"))
58 - access("OH"."HEADER_ID"="OL"."HEADER_ID")
60 - access("CUST"."CUST_ACCOUNT_ID"=)
66 - filter("SUSE"."SITE_USE_CODE"='SHIP_TO')
67 - access("SUSE"."SITE_USE_ID"=:B1)
68 - filter("ACCT_SITE"."ORG_ID"=:P_ORG_ID)
69 - access("SUSE"."CUST_ACCT_SITE_ID"="ACCT_SITE"."CUST_ACCT_SITE_ID")
71 - access("ACCT"."CUST_ACCOUNT_ID"="ACCT_SITE"."CUST_ACCOUNT_ID")
72 - access("P"."PARTY_ID"="ACCT"."PARTY_ID")
73 - filter(("ACCT"."PARTY_ID"="PARTY_SITE"."PARTY_ID" AND "P"."PARTY_ID"="PARTY_SITE"."PARTY_ID"))
74 - access("ACCT_SITE"."PARTY_SITE_ID"="PARTY_SITE"."PARTY_SITE_ID")
75 - access("LOC"."LOCATION_ID"="PARTY_SITE"."LOCATION_ID")
145 rows selected.one thing looking strange at predicate section at line 23 and 60 access("CUST"."CUST_ACCOUNT_ID"=),Plan is also differing why?Just look at filter predicates 3 and 39 which I highlighted previously.
With a query using bind variable, p_business_unit might be supplied with a null value and therefore two possible paths exist in the CONCATENTATION plan to cope with those possibilities (and the possibility that P_FROM_DATE is not <= P_TO_DATE).
If instead of using bind variable you supply a literal - i.e. '101468' - then the optimizer doesn't not have to worry about the fact that '101468' might be null. As far as this piece of SQL is concerned, it's a constant.
Therefore you shouldn't compare SQL that runs with binds with SQl that runs with literals, particularly where the sql involves conditional predicates.
To use a simplification, consider the difference here:
SQL> explain plan for
2 select 1 from dual where 1 = nvl(1,1);
Explained.
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 1388734953
| Id | Operation | Name | Rows | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 2 (0)| 00:00:01 |
| 1 | FAST DUAL | | 1 | 2 (0)| 00:00:01 |
8 rows selected.
SQL> explain plan for
2 select 1 from dual where 1 = nvl(:1,1);
Explained.
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 4034615273
| Id | Operation | Name | Rows | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 2 (0)| 00:00:01 |
|* 1 | FILTER | | | | |
| 2 | FAST DUAL | | 1 | 2 (0)| 00:00:01 |
Predicate Information (identified by operation id):
1 - filter(NVL(:1,1)=1)
14 rows selected.Furthermore, to emphasis my point about substition variables (&variable_name) consider this:
SQL> explain plan for
2 select 1 from dual where 1 = nvl(&1,1);
Enter value for 1: 1
Explained.
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 1388734953
| Id | Operation | Name | Rows | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 2 (0)| 00:00:01 |
| 1 | FAST DUAL | | 1 | 2 (0)| 00:00:01 |
8 rows selected.
SQL> Does the substitution variable behave like a bind variable or like a literal?
A literal, because that's what it is. Substituted in before the statement is sent to the database and parsed. -
Explain plan different for same query
Hi all,
I have a query, which basically selects some columns from a remote database view. The query is as follows:
select * from tab1@remotedb, tab2@remotedb
where tab1.cash_id = tab2.id
and tab1.date = '01-JAN-2003'
and tab2.country_code = 'GB';
Now, i am working on two environments, one is production and other is development. Production environment has following specification:
1. Remotedb = Oracle9i, Linux OS
2. Database on which query is running = Oracle10g, Linux OS
Development environment has following specification:
1. Remotedb = Oracle10g, Windows OS
2. Database on which query is running = Oracle10g, Linux OS
Both databases in development and production environments are on different machines.
when i execute the above query on production, i see full table scans on both tables in execution plan(TOAD), but when i execute the query in development, i see that both remote database tables are using index.
Why am i getting different execution plans on both databases? is there is any difference of user rights/priviliges or there is a difference of statistics on both databases. I have checked the statistics for both tables on Production and Development databases, they are updated.
This issue is creating a performance disaster in our Production system. Any kind of help or knowledge sharing is appreciated.
Thank you and Best Regards.We ran into a similar situation yesterday morning, though our implementation was easier than yours. Different plans in development and production though both systems were 10gR2 at the time. Production was doing a Merge Join Cartesian (!) instead of nested loop joins. Our DBA figured out that the production stats had been locked for some tables preventing stat refresh; she unlocked them and re-analyzed so which fixed our problem.
Of some interest was discovering that I got different execution plans from the same UPDATE via EXPLAIN PLAN and SQL*PLUS AUTOTRACE in development. Issue appears to have been bind peeking. Converting bind variables to constants yielded the AUTOTRACE plan, as did turning bind peeking off while using the bind variables. CURSOR_SHARING was set to EXACT too.
Message was edited by:
riedelme -
Explain plan for a sql statement
Hi,
I have a simple sql statement which has a cost of 122, cardinality 59 and CPU cost 1966777.
Same sql statement written in another way (using a nested select in the 'from' clause), has a cost of 58, cardinality 24 but cpu cost is much higher 29078895.
What should I look for? For a better cost overall, or for a better cpu cost? Which statement should I consider? What is most important?
Thanks.Roger25 wrote:
... Based on this, my question is what statement to choose? which is more important, the cost or the cpu cost?
Thanks.
Based on this, sorry, but my reply will remain unchanged:
Again, you cannot compare explain plan of two different queries.
Find out more:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:313416745628
Nicolas. -
Real explain plan differs from one in v$sqlarea
I have some more or less complex queries which I catch on runtime by reading v$sqlarea table to find sql with high cost..
but..
I found some highly costed sql, but when I run it through client ti see it's explain plan and execution time, it's much faster with very little cost
why?
am I wrong when I read v$sqlarea?
I'm using Oracle 11g R2This is not at all surprising. Jonathan Lewis and many other have discussed this numerous times both in these forums, in books, in white papers, and in conference presentations.
That said ... you should be looking in gv$sql_plan. -
Explain Plan different in SQLPlus then production
We have a query that is consuming 95%+ of the CPU in production, but the same query in sqlplus takes seconds. The explain plan through OEM is different than the explain plan in sqlplus, but the query is the same? Any thoughts?
Thanks.Your explanation raises many question.
We have a query that is consuming 95%+ of the CPU in production, How do you measure this?
but the same query in sqlplus takes seconds.What do you mean, by running in production or running in sqlplus?
How do you run on production? I mean, do you run through any application or what?
Are they running under the same user?
It is possible to post both execution plans and a more explanation on what you are saying. -
some pictures(jpeg or gif) come as part of email if i use IE9 these images open as part of the mail, but with firefox i have to download them separately and then they don't appear in email. i have been in the options menu and allowed yahoo.com to automatically load images but this has had no effect, thanks
Sounds like you did this on the fly.
MM is supposed to open the Marker Panel Dialogue
M just sets a marker
Not sure if either are intended for on the fly during playback .
There is also a Marker Icon on the Source Window Pane >> -
Why tkprof did not show explain plan for some sql statements
Hi,
I did a trace for one of the session, hoping to find the explain plan for its tkprof. However, I only get this:
INSERT INTO AUDIT_TABLE
VALUES
( :B1 , :B2 , :B3 , :B4 , :B5 , :B6 , :B8 , :B7 )
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 3698 8.08 59.41 3348 566 19092 3698
Fetch 0 0.00 0.00 0 0 0 0
total 3699 8.08 59.42 3348 566 19092 3698
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer mode: CHOOSE
Parsing user id: 30 (recursive depth: 2)
********************************************************************************Any idea why the explain plan is missing?
Also looking at the above statistics, what can I conclude?Thanks John. What's ur take on this statistics then?
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 1798 12.23 36.75 1758 5404 7418 1798
Fetch 0 0.00 0.00 0 0 0 0
total 1798 12.23 36.75 1758 5404 7418 1798
Misses in library cache during parse: 0
Optimizer mode: CHOOSE
Parsing user id: 30 (recursive depth: 1)
******************************************************************************** -
Wireless-Card doesn't not work with WPA/WPA2 but with WEP [Solved]
Hello I have a MacBook (late 2007) with a wireless-card from Broadcam, the card works with WEP and the classic configuration over rc.conf very well. But I can't get the card running with WPA and the net network-profiles.
Here is the link to the driver - http://www.broadcom.com/support/802.11/linux_sta.php
eth2 = wireless-card
eth1 = firewireanything
eth0 = wired-card
rc.conf
# /etc/rc.conf - Main Configuration for Arch Linux
# LOCALIZATION
# LOCALE: available languages can be listed with the 'locale -a' command
# HARDWARECLOCK: set to "UTC" or "localtime"
# USEDIRECTISA: use direct I/O requests instead of /dev/rtc for hwclock
# TIMEZONE: timezones are found in /usr/share/zoneinfo
# KEYMAP: keymaps are found in /usr/share/kbd/keymaps
# CONSOLEFONT: found in /usr/share/kbd/consolefonts (only needed for non-US)
# CONSOLEMAP: found in /usr/share/kbd/consoletrans
# USECOLOR: use ANSI color sequences in startup messages
LOCALE="en_US.utf8"
HARDWARECLOCK="UTC"
USEDIRECTISA="no"
TIMEZONE="Europe/Berlin"
KEYMAP="us"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"
# HARDWARE
# MOD_AUTOLOAD: Allow autoloading of modules at boot and when needed
# MOD_BLACKLIST: Prevent udev from loading these modules
# MODULES: Modules to load at boot-up. Prefix with a ! to blacklist.
# NOTE: Use of 'MOD_BLACKLIST' is deprecated. Please use ! in the MODULES array.
MOD_AUTOLOAD="yes"
#MOD_BLACKLIST=() #deprecated
#MODULES=(sky2 snd-mixer-oss snd-pcm-oss snd-hwdep snd-page-alloc snd-pcm snd-timer snd snd-hda-intel soundcore)
# Scan for LVM volume groups at startup, required if you use LVM
USELVM="no"
# NETWORKING
# HOSTNAME: Hostname of machine. Should also be put in /etc/hosts
HOSTNAME="macbook"
# Use 'ifconfig -a' or 'ls /sys/class/net/' to see all available interfaces.
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES
# - prefix an entry in INTERFACES with a ! to disable it
# - no hyphens in your interface names - Bash doesn't like it
# DHCP: Set your interface to "dhcp" (eth0="dhcp")
# Wireless: See network profiles below
eth0="eth0 192.168.1.220 netmask 255.255.255.0 broadcast 192.168.1.255"
INTERFACES=(!eth0 !eth1 eth2)
# Routes to start at boot-up (in this order)
# Declare each route then list in ROUTES
# - prefix an entry in ROUTES with a ! to disable it
gateway="default gw 192.168.1.1"
ROUTES=(!gateway)
# Enable these network profiles at boot-up. These are only useful
# if you happen to need multiple network configurations (ie, laptop users)
# - set to 'menu' to present a menu during boot-up (dialog package required)
# - prefix an entry with a ! to disable it
# Network profiles are found in /etc/network.d
# This now requires the netcfg package
NETWORKS=(wireless)
# DAEMONS
# Daemons to start at boot-up (in this order)
# - prefix a daemon with a ! to disable it
# - prefix a daemon with a @ to start it up in the background
DAEMONS=(syslog-ng network net-profiles netfs alsa crond portmap fam hal)
/etc/network.d/wireless
CONNECTION="wireless"
INTERFACE=eth2
HOSTNAME=macbook
IP="static"
IFOPTS="192.168.1.225 netmask 255.255.255.0 broadcast 192.168.1.255"
GATEWAY=192.168.1.1
DNS1=192.168.1.1
# Wireless Settings (optional)
ESSID=3Com
#KEY=
IWOPTS="mode managed essid $ESSID channel 11"
#WIFI_INTERFACE=wlan0 # use this if you have a special wireless interface
# that is linked to the real $INTERFACE
#WIFI_WAIT=5 # seconds to wait for the wireless card to
# associate before bringing the interface up
USEWPA="yes" # start wpa_supplicant with the profile
WPAOPTS="" # use "" for normal operation or specify additional
# options (eg, "-D ipw")
# see /etc/wpa_supplicant.conf for configuration
Can I set here the WPA/WPA2-Key also? Why here ESSID? Do I need still a configuration in wpa_supplicant.conf?
Thats very confusing and not explained.
WPAOPTS? Do I need to add something like "-D wext"?
/etc/wpa_supplicant.conf
# This is a network block that connects to any unsecured access point.
# We give it a low priority so any defined blocks are preferred.
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=wheel
network={
key_mgmt=NONE
priority=-9999999
network={
ssid="3Com"
proto=WPA
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
psk="topsecret"
priority=5
# WPA2
# proto=WPA RSN
I need help. Please
Last edited by hoschi (2009-01-04 20:21:58)fwojciec wrote:If this info is not in the wiki it might be worth it to add it -- it's all detailed in /etc/network.d/examples/complete.example though.
Thats the reason why I was so confused.
My new and well working configuration:
# /etc/rc.conf - Main Configuration for Arch Linux
# LOCALIZATION
# LOCALE: available languages can be listed with the 'locale -a' command
# HARDWARECLOCK: set to "UTC" or "localtime"
# USEDIRECTISA: use direct I/O requests instead of /dev/rtc for hwclock
# TIMEZONE: timezones are found in /usr/share/zoneinfo
# KEYMAP: keymaps are found in /usr/share/kbd/keymaps
# CONSOLEFONT: found in /usr/share/kbd/consolefonts (only needed for non-US)
# CONSOLEMAP: found in /usr/share/kbd/consoletrans
# USECOLOR: use ANSI color sequences in startup messages
LOCALE="en_US.utf8"
HARDWARECLOCK="UTC"
USEDIRECTISA="no"
TIMEZONE="Europe/Berlin"
KEYMAP="us"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"
# HARDWARE
# MOD_AUTOLOAD: Allow autoloading of modules at boot and when needed
# MOD_BLACKLIST: Prevent udev from loading these modules
# MODULES: Modules to load at boot-up. Prefix with a ! to blacklist.
# NOTE: Use of 'MOD_BLACKLIST' is deprecated. Please use ! in the MODULES array.
MOD_AUTOLOAD="yes"
#MOD_BLACKLIST=() #deprecated
#MODULES=(sky2 snd-mixer-oss snd-pcm-oss snd-hwdep snd-page-alloc snd-pcm snd-timer snd snd-hda-intel soundcore)
# Scan for LVM volume groups at startup, required if you use LVM
USELVM="no"
# NETWORKING
# HOSTNAME: Hostname of machine. Should also be put in /etc/hosts
HOSTNAME="macbook"
# Use 'ifconfig -a' or 'ls /sys/class/net/' to see all available interfaces.
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES
# - prefix an entry in INTERFACES with a ! to disable it
# - no hyphens in your interface names - Bash doesn't like it
# DHCP: Set your interface to "dhcp" (eth0="dhcp")
# Wireless: See network profiles below
eth0="eth0 192.168.1.220 netmask 255.255.255.0 broadcast 192.168.1.255"
INTERFACES=(!eth0 !eth1 !eth2)
# Routes to start at boot-up (in this order)
# Declare each route then list in ROUTES
# - prefix an entry in ROUTES with a ! to disable it
gateway="default gw 192.168.1.1"
ROUTES=(!gateway)
# Enable these network profiles at boot-up. These are only useful
# if you happen to need multiple network configurations (ie, laptop users)
# - set to 'menu' to present a menu during boot-up (dialog package required)
# - prefix an entry with a ! to disable it
# Network profiles are found in /etc/network.d
# This now requires the netcfg package
NETWORKS=(3com)
# DAEMONS
# Daemons to start at boot-up (in this order)
# - prefix a daemon with a ! to disable it
# - prefix a daemon with a @ to start it up in the background
DAEMONS=(syslog-ng network net-profiles netfs alsa crond portmap fam hal)
CONNECTION="wireless"
DESCRIPTION="Very verbose complete wireless example"
INTERFACE=eth2
HOSTNAME=macbook
# Interface Settings (use IP="dhcp" for DHCP)
IP="static"
IFOPTS="192.168.1.225 netmask 255.255.255.0 broadcast 192.168.1.255"
GATEWAY=192.168.1.1
# DNS Settings (optional)
DOMAIN=localdomain
DNS1=192.168.1.1
DNS2=
SEARCH=
# Standard Wireless Settings
ESSID=3Com
SECURITY=wpa-config # One of wep, wpa, wpa-config, none
KEY=""
# Scans to see if network is available before connecting (reccomended)
SCAN="YES"
# Time to wait to connect to a network. Default 15.
TIMEOUT=10
# Pass *custom* options to iwconfig. Usually not needed (optional)
IWOPTS="mode managed essid $ESSID channel 6 key restricted $KEY"
# Any extra arguments for wpa_supplicant
WPA_OPTS=
# For SECURITY='wpa-config' only - filename of a wpa-supplicant config
WPA_CONF=/etc/wpa_supplicant.conf
# This is a network block that connects to any unsecured access point.
# We give it a low priority so any defined blocks are preferred.
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=wheel
network={
key_mgmt=NONE
priority=-9999999
network={
ssid="Linksys"
proto=WPA RSN
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
psk="areulookingatmybreasts"
priority=5
network={
ssid="3Com"
proto=WPA
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
psk="nomam"
priority=5
# WPA2
# proto=WPA RSN
There are also profiles for the Linksys-Router and for wired cable.
Thanks for the help!
Last edited by hoschi (2009-01-04 20:21:23)
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