optimizing the query in db2 v9.1 luw

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

jmartin_vAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

momi_sabagCommented:
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

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
LowfatspreadCommented:
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

jmartin_vAuthor Commented:
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
LowfatspreadCommented:
what error did the query give when it failed?

could you try creating the subquery as a view ?

jmartin_vAuthor Commented:
helped partially
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
DB2

From novice to tech pro — start learning today.