Re: hardware advice

On Thu, Sep 27, 2012 at 2:46 PM, M. D. <lists(at)turnkey(dot)bz> wrote:
>
> select item.item_id,item_plu.number,item.description,
> (select number from account where asset_acct = account_id),
> (select number from account where expense_acct = account_id),
> (select number from account where income_acct = account_id),
> (select dept.name from dept where dept.dept_id = item.dept_id) as dept,
> (select subdept.name from subdept where subdept.subdept_id =
> item.subdept_id) as subdept,
> (select sum(on_hand) from item_change where item_change.item_id =
> item.item_id) as on_hand,
> (select sum(on_order) from item_change where item_change.item_id =
> item.item_id) as on_order,
> (select sum(total_cost) from item_change where item_change.item_id =
> item.item_id) as total_cost
> from item join item_plu on item.item_id = item_plu.item_id and
> item_plu.seq_num = 0
> where item.inactive_on is null and exists (select item_num.number from
> item_num
> where item_num.item_id = item.item_id)
> and exists (select stocked from item_store where stocked = 'Y'
> and inactive_on is null
> and item_store.item_id = item.item_id)

Have you tried re-writing this query first? Is there a reason to have
a bunch of subselects instead of joining the tables? What pg version
are you running btw? A newer version of pg might help too.