Add v_listprices view (#275)

2022-05-18 15:13:07 +02:00
parent cbca0066a0
commit 0930595c89
1 changed files with 80 additions and 0 deletions
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+-- Experiment to replace listprices table with a view
+
+-- Move local price adjustments from yaml file in API2 to table so we can access data
+CREATE TYPE price_adjustments_product_type AS ENUM ('product', 'inquiry');
+CREATE TABLE price_adjustments (
+	market_id int REFERENCES markets (id) NOT NULL,
+	material_id int REFERENCES "product-materials" (materialid) NOT NULL,
+	product_type price_adjustments_product_type NOT NULL,
+	value numeric NOT NULL,
+	inserted timestamp with time zone DEFAULT now(),
+	updated timestamp with time zone,
+	UNIQUE (market_id, material_id, product_type)
+);
+CREATE TRIGGER updated_timestamp BEFORE UPDATE ON price_adjustments FOR EACH ROW EXECUTE PROCEDURE updated_timestamp();
+INSERT INTO price_adjustments (market_id, material_id, product_type, value) VALUES
+	((select id from markets where name = 'IT'), (select materialid from "product-materials" where material = 'standard-wallpaper'), 'inquiry', 1.1034),
+	((select id from markets where name = 'GB'), (select materialid from "product-materials" where material = 'standard-wallpaper'), 'inquiry', 1.1154),
+	((select id from markets where name = 'DE'), (select materialid from "product-materials" where material = 'standard-wallpaper'), 'inquiry', 1.0625),
+	((select id from markets where name = 'GB'), (select materialid from "product-materials" where material = 'standard-wallpaper'), 'product', 1.1154),
+	((select id from markets where name = 'DE'), (select materialid from "product-materials" where material = 'standard-wallpaper'), 'product', 1.0625),
+	((select id from markets where name = 'IT'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'inquiry', 1.1250),
+	((select id from markets where name = 'SE'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'inquiry', 1.0462),
+	((select id from markets where name = 'GB'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'inquiry', 1.1034),
+	((select id from markets where name = 'DE'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'inquiry', 1.1143),
+	((select id from markets where name = 'NL'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'inquiry', 1.0833),
+	((select id from markets where name = 'GB'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'product', 1.1034),
+	((select id from markets where name = 'DE'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'product', 1.1143),
+	((select id from markets where name = 'SE'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'product', 1.0462),
+	((select id from markets where name = 'NL'), (select materialid from "product-materials" where material = 'premium-wallpaper'), 'product', 1.0833)
+;
+
+create view v_listprices as
+select
+    printid printproduct_id,
+    markets.id market_id,
+    round(
+		-- Base price
+		CASE
+			WHEN groupid IN (1,3) THEN -- Wallpaper
+				(select (price/100.0) from "product-materials" where material = 'standard-wallpaper')
+			WHEN groupid = 2 THEN -- Canvas
+				(select min(price_sek) from external_print_products where group_id = 2)
+			WHEN groupid IN (7,8) THEN -- Poster
+				(select min(price_sek) from external_print_products where group_id in (7,8))
+		END
+        -- Market price adjustment, and VAT, and currency exchange rate
+        * exchange_rate * price_adjustment * vat
+        -- Designer price premium, if exist
+        * (coalesce(
+			CASE
+				WHEN groupid IN (1,3) THEN pricepremium_wallpaper
+				WHEN groupid = 2 THEN pricepremium_canvas
+				WHEN groupid = 7 THEN pricepremium_poster
+				WHEN groupid = 8 THEN pricepremium_framed_print
+			END
+			, 1) / 100.0 + 1)
+		-- Local product type adjustments, if wallpaper, and if exists
+		* COALESCE(
+			CASE WHEN groupid in (1,3) THEN
+				(select value from price_adjustments where material_id = 1 and product_type = 'product' and market_id = markets.id limit 1)
+			END
+		, 1.0)
+        -- Round to two decimals (to allow for more precision when shown as sq feet)
+        , 2) listprice
+from
+    "product-printproducts"
+    join "product-products" using (productid)
+    left join designers using (designerid),
+    markets join "product-currencies" on currency = iso3char
+;
+
+COMMENT ON COLUMN v_listprices.listprice IS 'Canvas and poster listprice:
+Start with price (SEK) for cheapest canvas/poster size.
+Multiply with market price adjustment, VAT and currency exchange rate.
+Multiply with designer price premium, if exists.
+Round to two decimals.
+
+Wallpaper listprice:
+Same as poster/canvas, but start with the price for 1 m/2 standard wallpaper.
+Also include local wallpaper price adjustments (per market, product type, and material) if exists.';