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123 lines
3.8 KiB
SQL
123 lines
3.8 KiB
SQL
DROP VIEW stock_next_use;
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CREATE VIEW stock_next_use
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AS
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/*
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The default consume rule is:
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Opened first, then first due first, then first in first out
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Apart from that products at their default consume location should be consumed first
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This orders the stock entries by that
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=> Highest "priority" per product = the stock entry to use next
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=> ORDER BY clause = ORDER BY priority DESC, open DESC, best_before_date ASC, purchased_date ASC
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*/
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SELECT
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(ROW_NUMBER() OVER(PARTITION BY s.product_id ORDER BY CASE WHEN IFNULL(p.default_consume_location_id, -1) = s.location_id THEN 0 ELSE 1 END ASC, s.open DESC, s.best_before_date ASC, s.purchased_date ASC)) * -1 AS priority,
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s.*
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FROM stock s
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JOIN products p
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ON p.id = s.product_id
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ORDER BY CASE WHEN IFNULL(p.default_consume_location_id, -1) = s.location_id THEN 0 ELSE 1 END ASC, s.open DESC, s.best_before_date ASC, s.purchased_date ASC;
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CREATE TRIGGER stock_next_use_INS INSTEAD OF INSERT ON stock_next_use
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BEGIN
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INSERT INTO stock
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(product_id, amount, best_before_date, purchased_date, stock_id,
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price, open, opened_date, location_id, shopping_location_id, note)
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VALUES
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(NEW.product_id, NEW.amount, NEW.best_before_date, NEW.purchased_date, NEW.stock_id,
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NEW.price, NEW.open, NEW.opened_date, NEW.location_id, NEW.shopping_location_id, NEW.note);
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END;
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CREATE TRIGGER stock_next_use_UPD INSTEAD OF UPDATE ON stock_next_use
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BEGIN
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UPDATE stock
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SET product_id = NEW.product_id,
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amount = NEW.amount,
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best_before_date = NEW.best_before_date,
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purchased_date = NEW.purchased_date,
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stock_id = NEW.stock_id,
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price = NEW.price,
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open = NEW.open,
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opened_date = NEW.opened_date,
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location_id = NEW.location_id,
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shopping_location_id = NEW.shopping_location_id,
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note = NEW.note
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WHERE id = NEW.id;
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END;
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CREATE TRIGGER stock_next_use_DEL INSTEAD OF DELETE ON stock_next_use
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BEGIN
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DELETE FROM stock
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WHERE id = OLD.id;
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END;
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DROP VIEW products_current_substitutions;
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CREATE VIEW products_current_substitutions
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AS
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/*
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When a parent product is not in stock itself,
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any sub product (the next based on the default consume rule) should be used
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This view lists all parent products and in the column "product_id_effective" either itself,
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when the corresponding parent product is currently in stock itself, or otherwise the next sub product to use
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*/
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SELECT
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-1, -- Dummy
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p_sub.id AS parent_product_id,
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CASE WHEN p_sub.has_sub_products = 1 THEN
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CASE WHEN IFNULL(sc.amount, 0) = 0 THEN -- Parent product itself is currently not in stock => use the next sub product
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(
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SELECT x_snu.product_id
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FROM products_resolved x_pr
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JOIN stock_next_use x_snu
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ON x_pr.sub_product_id = x_snu.product_id
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WHERE x_pr.parent_product_id = p_sub.id
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AND x_pr.parent_product_id != x_pr.sub_product_id
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ORDER BY x_snu.priority DESC, x_snu.open DESC, x_snu.best_before_date ASC, x_snu.purchased_date ASC
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LIMIT 1
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)
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ELSE -- Parent product itself is currently in stock => use it
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p_sub.id
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END
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END AS product_id_effective
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FROM products_view p
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JOIN products_resolved pr
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ON p.id = pr.parent_product_id
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JOIN products_view p_sub
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ON pr.sub_product_id = p_sub.id
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JOIN stock_current sc
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ON p_sub.id = sc.product_id
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WHERE p_sub.has_sub_products = 1;
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DROP VIEW products_current_price;
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CREATE VIEW products_current_price
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AS
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/*
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Current price per product,
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based on the stock entry to use next,
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or on the last price if the product is currently not in stock
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*/
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SELECT
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-1 AS id, -- Dummy,
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p.id AS product_id,
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IFNULL(snu.price, plp.price) AS price
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FROM products p
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LEFT JOIN (
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SELECT
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product_id,
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MAX(priority),
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price -- Bare column, ref https://www.sqlite.org/lang_select.html#bare_columns_in_an_aggregate_query
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FROM stock_next_use
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GROUP BY product_id
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ORDER BY priority DESC, open DESC, best_before_date ASC, purchased_date ASC
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) snu
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ON p.id = snu.product_id
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LEFT JOIN products_last_purchased plp
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ON p.id = plp.product_id;
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