Recreate your SQL to use joins vs. in

>>> "deepak" <db2udbdba-ezmlmshield-x10914130.[Email address protected]
11/24/2004 12:28:45 PM >>>
Hi Folks,

Could you guys recommend some quick tips for improving performance
of static cursors in db2...

declare cur1 cursor with hold for
select ta1, rownumber() over ( order by ta1 )
from tabA where ta1 in (select distinct (tb1) from tabB where tb2 in
(8,6,3)
and tb3 <= :timestamp1
and tb4 in (select tc1 from tabC where tc2 = :timestamp1
and tc3 <= :timestamp1)
and tb5 in (select td1 from tabD where td2 = :num2)
and ta1 > :num1)

TabA and tabB each have 10 Mill rows each.....

ta1 and tb1 are indexed......


Basically, the open of cursor when run in 10 concurrent agents,takes a
lot of time

Thanks in advance





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