Solved

optimizing the query in db2 v9.1 luw

Posted on 2011-03-17
5
451 Views
Last Modified: 2012-05-11
I have a query which will take almost 3 min to run adn provide the result.

I need to optimize this query and kindly suggest any tools with link which will be helpful

This is critically needed..
select 
	LTRIM(RTRIM("REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_NAME")) "C0" , 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_ENG_DATE" "C1" , 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_WIN_STATUS" "C2" , 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SCOPE" "C3" , 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SECTOR" "C4" , 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_INDUSTRY" "C5" , 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_COMPETITORS" "C6" , 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SKEY" "C7" , 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_REVENUE" "C8" , 
	sum("FACT_SPEND_ANALYSIS"."INVOICE_AMOUNT_LOCAL_CURRENCY" * "EXCHANGE_RATE"."EXCHANGE_RATE") over (partition by LTRIM(RTRIM("REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_NAME")), 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SCOPE", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SECTOR", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_INDUSTRY", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_COMPETITORS", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_WIN_STATUS", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_ENG_DATE") "C9" , 
	sum(case  when "ADDRESSABLE_SPEND"."ADDRESSABLE_DESCRIPTION" = 'Addressable' then "FACT_SPEND_ANALYSIS"."INVOICE_AMOUNT_LOCAL_CURRENCY" * "EXCHANGE_RATE"."EXCHANGE_RATE" else 0 end ) over (partition by LTRIM(RTRIM("REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_NAME")), 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SCOPE", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SECTOR", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_INDUSTRY", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_COMPETITORS", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_WIN_STATUS", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_ENG_DATE") "C10" , 
	sum(case  when "ADDRESSABLE_SPEND"."ADDRESSABLE_DESCRIPTION" = 'Unaddressable' then "FACT_SPEND_ANALYSIS"."INVOICE_AMOUNT_LOCAL_CURRENCY" * "EXCHANGE_RATE"."EXCHANGE_RATE" else 0 end ) over (partition by LTRIM(RTRIM("REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_NAME")), 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SCOPE", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SECTOR", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_INDUSTRY", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_COMPETITORS", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_WIN_STATUS", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_ENG_DATE") "C11" , 
	sum(case  when "ADDRESSABLE_SPEND"."ADDRESSABLE_DESCRIPTION"  NOT  in ('Addressable', 'Unaddressable') then "FACT_SPEND_ANALYSIS"."INVOICE_AMOUNT_LOCAL_CURRENCY" * "EXCHANGE_RATE"."EXCHANGE_RATE" else 0 end ) over (partition by LTRIM(RTRIM("REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_NAME")), 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SCOPE", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SECTOR", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_INDUSTRY", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_COMPETITORS", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_WIN_STATUS", 
	"REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_ENG_DATE") "C12" 

from
	(((("COGNOS"."REF_PARENT_COMPANY_SPEND" "REF_PARENT_COMPANY_SPEND" 
	inner join "COGNOS"."DIM_COMPANY_CODE_SPEND" "COMPANY_CODE_SPEND" on "REF_PARENT_COMPANY_SPEND"."PARENT_COMPANY_SKEY" = "COMPANY_CODE_SPEND"."PARENT_COMPANY_SKEY") 
	inner join "COGNOS"."FACT_SPEND_ANALYSIS" "FACT_SPEND_ANALYSIS" on "COMPANY_CODE_SPEND"."COMPANY_CODE_SKEY" = "FACT_SPEND_ANALYSIS"."COMPANY_CODE_SKEY") 
	inner join "COGNOS"."DIM_ADDRESSABLE_SPEND" "ADDRESSABLE_SPEND" on "ADDRESSABLE_SPEND"."ADDRESSABLE_SKEY" = "FACT_SPEND_ANALYSIS"."ADDRESSABLE_SKEY") 
	inner join "COGNOS"."DIM_DATE_SPEND" "INVOICE_DATE_SPEND" on "INVOICE_DATE_SPEND"."DATE_SKEY" = "FACT_SPEND_ANALYSIS"."INVOICE_DATE_SKEY") 
	inner join (
		select "EXCHANGE_RATE"."CURRENCY_SKEY" "CURRENCY_SKEY" , "EXCHANGE_RATE"."EXCHANGE_RATE" "EXCHANGE_RATE" 
		from "COGNOS"."TEMP_EXCHANGERATE" "EXCHANGE_RATE"
		where "EXCHANGE_RATE"."TO_CURRENCY_CODE" = 'USD') "EXCHANGE_RATE" on "EXCHANGE_RATE"."CURRENCY_SKEY" = "FACT_SPEND_ANALYSIS"."LOCAL_CURRENCY_SKEY"

where 
	"INVOICE_DATE_SPEND"."FISCAL_YEAR_NO" = 2010 or 2010 - "INVOICE_DATE_SPEND"."CALENDAR_YEAR_NO" = 2010 FOR FETCH ONLY

Open in new window

0
Comment
Question by:jmartin_v
  • 2
  • 2
5 Comments
 
LVL 37

Accepted Solution

by:
momi_sabag earned 500 total points
ID: 35157646
can you post the access plan?

basically, make sure your statistics are updated and that you have indexes to support all the join operations

for deeper analysis please post the number of rows in each table and available indexes
0
 
LVL 50

Expert Comment

by:Lowfatspread
ID: 35158501
try this

at the least replace the or 2010 - .... calculation with
 or calendar_date=0   the calulation maybe causing problems with index usage...


select 
	x."C0" , 
	x."PARENT_COMPANY_ENG_DATE" "C1" , 
	x."PARENT_COMPANY_WIN_STATUS" "C2" , 
	x."PARENT_COMPANY_SCOPE" "C3" , 
	x."PARENT_COMPANY_SECTOR" "C4" , 
	x."PARENT_COMPANY_INDUSTRY" "C5" , 
	x."PARENT_COMPANY_COMPETITORS" "C6" , 
	PSm."PARENT_COMPANY_SKEY" "C7" , 
	PSm."PARENT_COMPANY_REVENUE" "C8" , 
     x.c9,x.c10,x.c11,x.c12
From "COGNOS"."REF_PARENT_COMPANY_SPEND" as PSM
inner join
(
Select 
LTRIM(RTRIM(PS."PARENT_COMPANY_NAME")) as co, 
	PS."PARENT_COMPANY_SCOPE", 
	PS."PARENT_COMPANY_SECTOR", 
	PS."PARENT_COMPANY_INDUSTRY", 
	PS."PARENT_COMPANY_COMPETITORS", 
	PS."PARENT_COMPANY_WIN_STATUS", 
	PS."PARENT_COMPANY_ENG_DATE",
	sum("FACT_SPEND_ANALYSIS"."INVOICE_AMOUNT_LOCAL_CURRENCY" * "EXCHANGE_RATE"."EXCHANGE_RATE")  "C9" , 
	sum(case  when "ADDRESSABLE_SPEND"."ADDRESSABLE_DESCRIPTION" = 'Addressable' then "FACT_SPEND_ANALYSIS"."INVOICE_AMOUNT_LOCAL_CURRENCY" * "EXCHANGE_RATE"."EXCHANGE_RATE" else 0 end )  "C10" , 
	sum(case  when "ADDRESSABLE_SPEND"."ADDRESSABLE_DESCRIPTION" = 'Unaddressable' then "FACT_SPEND_ANALYSIS"."INVOICE_AMOUNT_LOCAL_CURRENCY" * "EXCHANGE_RATE"."EXCHANGE_RATE" else 0 end )  "C11" , 
	sum(case  when "ADDRESSABLE_SPEND"."ADDRESSABLE_DESCRIPTION"  NOT  in ('Addressable', 'Unaddressable') then "FACT_SPEND_ANALYSIS"."INVOICE_AMOUNT_LOCAL_CURRENCY" * "EXCHANGE_RATE"."EXCHANGE_RATE" else 0 end ) "C12" 

from
	(((("COGNOS"."REF_PARENT_COMPANY_SPEND" as PS 
	inner join "COGNOS"."DIM_COMPANY_CODE_SPEND" "COMPANY_CODE_SPEND" on PS."PARENT_COMPANY_SKEY" = "COMPANY_CODE_SPEND"."PARENT_COMPANY_SKEY") 
	inner join "COGNOS"."FACT_SPEND_ANALYSIS" "FACT_SPEND_ANALYSIS" on "COMPANY_CODE_SPEND"."COMPANY_CODE_SKEY" = "FACT_SPEND_ANALYSIS"."COMPANY_CODE_SKEY") 
	inner join "COGNOS"."DIM_ADDRESSABLE_SPEND" "ADDRESSABLE_SPEND" on "ADDRESSABLE_SPEND"."ADDRESSABLE_SKEY" = "FACT_SPEND_ANALYSIS"."ADDRESSABLE_SKEY") 
	inner join "COGNOS"."DIM_DATE_SPEND" "INVOICE_DATE_SPEND" on "INVOICE_DATE_SPEND"."DATE_SKEY" = "FACT_SPEND_ANALYSIS"."INVOICE_DATE_SKEY") 
	inner join (
		select "EXCHANGE_RATE"."CURRENCY_SKEY" "CURRENCY_SKEY" , "EXCHANGE_RATE"."EXCHANGE_RATE" "EXCHANGE_RATE" 
		from "COGNOS"."TEMP_EXCHANGERATE" "EXCHANGE_RATE"
		where "EXCHANGE_RATE"."TO_CURRENCY_CODE" = 'USD') "EXCHANGE_RATE" on "EXCHANGE_RATE"."CURRENCY_SKEY" = "FACT_SPEND_ANALYSIS"."LOCAL_CURRENCY_SKEY"

where 
	"INVOICE_DATE_SPEND"."FISCAL_YEAR_NO" = 2010
or  "INVOICE_DATE_SPEND"."CALENDAR_YEAR_NO" = 0
group by 
LTRIM(RTRIM(PS."PARENT_COMPANY_NAME"))  , 
	PS."PARENT_COMPANY_ENG_DATE" , 
	PS."PARENT_COMPANY_WIN_STATUS"  , 
	PS."PARENT_COMPANY_SCOPE"  , 
	PS."PARENT_COMPANY_SECTOR"  , 
	PS."PARENT_COMPANY_INDUSTRY"  , 
	PS."PARENT_COMPANY_COMPETITORS"  , 
	PS."PARENT_COMPANY_SKEY"  , 
	PS."PARENT_COMPANY_REVENUE"  
) as X
on x."C0" =LTRIM(RTRIM(PSm."PARENT_COMPANY_NAME"))  
and	x."PARENT_COMPANY_ENG_DATE" =psm."PARENT_COMPANY_ENG_DATE" 
and	x."PARENT_COMPANY_WIN_STATUS" =psm."PARENT_COMPANY_WIN_STATUS" 
and	x."PARENT_COMPANY_SCOPE" =psm."PARENT_COMPANY_SCOPE"
and	x."PARENT_COMPANY_SECTOR" =psm."PARENT_COMPANY_SECTOR"
and	x."PARENT_COMPANY_INDUSTRY" =psm."PARENT_COMPANY_INDUSTRY"
and	x."PARENT_COMPANY_COMPETITORS" =psm."PARENT_COMPANY_COMPETITORS"
 FOR FETCH ONLY

Open in new window

0
 

Author Comment

by:jmartin_v
ID: 35167821
HI

The index are also there, in the one of the prime table the count of table is 194563...

@lowfatspread...

The above query did not work

to add a point the query is used by cognos team to generate reports and the query is creted by using the toll and is not hand written..tried using the quest sql optimizer which mentioned that the sql does not support..
please help on this
0
 
LVL 50

Expert Comment

by:Lowfatspread
ID: 35171307
what error did the query give when it failed?

could you try creating the subquery as a view ?

0
 

Author Closing Comment

by:jmartin_v
ID: 35768367
helped partially
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

November 2009 Recently, a question came up in the DB2 forum regarding the date format in DB2 UDB for AS/400.  Apparently in UDB LUW (Linux/Unix/Windows), the date format is a system-wide setting, and is not controlled at the session level.  I'm n…
Recursive SQL in UDB/LUW (you can use 'recursive' and 'SQL' in the same sentence) A growing number of database queries lend themselves to recursive solutions.  It's not always easy to spot when recursion is called for, especially for people una…
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, Just open a new email message.  In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
This video explains how to create simple products associated to Magento configurable product and offers fast way of their generation with Store Manager for Magento tool.

757 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now