numerus/deploy/invoice_product_amount.sql

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-- Deploy numerus:invoice_product_amount to pg
-- requires: schema_numerus
-- requires: invoice_product
-- requires: invoice_product_tax
begin;
set search_path to numerus, public;
create or replace view invoice_product_amount as
select invoice_product_id
, round(price * quantity * (1 - discount_rate))::integer as subtotal
, max(round(price * quantity * (1 - discount_rate))::integer) + coalesce(sum(round(round(price * quantity * (1 - discount_rate))::integer * tax_rate)::integer)::integer, 0) as total
from invoice_product
left join invoice_product_tax using (invoice_product_id)
group by invoice_product_id, price, quantity, discount_rate
;
grant select on table invoice_product_amount to invoicer;
grant select on table invoice_product_amount to admin;
commit;