65 lines
2.1 KiB
MySQL
65 lines
2.1 KiB
MySQL
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-- Deploy numerus:compute_new_invoice_amount to pg
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-- requires: schema_numerus
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-- requires: company
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-- requires: currency
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-- requires: tax
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-- requires: new_invoice_product
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-- requires: new_invoice_amount
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begin;
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set search_path to numerus, public;
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create or replace function compute_new_invoice_amount(company_id integer, products new_invoice_product[]) returns new_invoice_amount as
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$$
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declare
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result new_invoice_amount;
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begin
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if array_length(products, 1) is null then
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select to_price(0, decimal_digits), array[]::text[][], to_price(0, decimal_digits)
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from company
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join currency using (currency_code)
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where company.company_id = compute_new_invoice_amount.company_id
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into result.subtotal, result.taxes, result.total;
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else
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with product as (
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select round(parse_price(price, currency.decimal_digits) * quantity * (1 - discount_rate))::integer as subtotal
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, tax
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, decimal_digits
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from unnest(products)
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join company on company.company_id = compute_new_invoice_amount.company_id
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join currency using (currency_code)
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)
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, tax_amount as (
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select tax_id
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, sum(round(subtotal * tax.rate)::integer)::integer as amount
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, decimal_digits
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from product, unnest(product.tax) as product_tax(tax_id)
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join tax using (tax_id)
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group by tax_id, decimal_digits
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)
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, tax_total as (
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select sum(amount)::integer as amount, array_agg(array[name, to_price(amount, decimal_digits)]) as taxes
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from tax_amount
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join tax using (tax_id)
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)
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select to_price(sum(subtotal)::integer, decimal_digits)
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, coalesce(taxes, array[]::text[][])
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, to_price(sum(subtotal)::integer + coalesce(tax_total.amount, 0), decimal_digits) as total
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from product, tax_total
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group by tax_total.amount, taxes, decimal_digits
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into result.subtotal, result.taxes, result.total;
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end if;
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return result;
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end
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$$
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language plpgsql
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stable;
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revoke execute on function compute_new_invoice_amount(integer, new_invoice_product[]) from public;
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grant execute on function compute_new_invoice_amount(integer, new_invoice_product[]) to invoicer;
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grant execute on function compute_new_invoice_amount(integer, new_invoice_product[]) to admin;
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commit;
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