I have full access to the database, but no access to the application
source code. If creating an index will help, I can do that, but
with the columns I don't see it helping as I don't have access to
the application source to change that.
So yes, by changing settings, I would like to know if there's any
memory settings I can change to help or create an index. There is
an index on the customer_id column in the gltx table, so I'm not
sure what else could be done.
If there was a way to create a select trigger, I would do it and
return 0 for both columns on that customer_id as it should always be
0.
On 09/24/2011 12:10 AM, Filip Rembiałkowski wrote:
2011/9/23 M. D. <lists@xxxxxxxxxx>
I did a software upgrade, and with it came a new feature where
when selecting a customer it queries for the sum of a few
columns. This takes 7 seconds for the 'Cash Sale' customer -
by far the most active customer. I'd like to see if it's
possible to get it down a bit by changing settings.
To make things clear before we search for a solution. You
wrote "by changing settings". Is it the only option? Can't you
change the query in software? Can't you change database schema
(add indexes etc)?
Query:
explain analyse select sum(item_points),sum(disc_points) from
invoice left join gltx on invoice.invoice_id = gltx.gltx_id
where gltx.inactive_on is null and gltx.posted = 'Y' and
gltx.customer_id = 'A0ZQ2gsACIsEKLI638ikyg'
Aside from other things, you know that LEFT join here is
useless? - planner should collapse it to normal join but I'd
check.
Filip
|
