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57 lines
2.3 KiB
SQL
57 lines
2.3 KiB
SQL
DROP VIEW products_last_purchased;
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CREATE VIEW products_last_purchased
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AS
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SELECT
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1 AS id, -- Dummy, LessQL needs an id column
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sl.product_id,
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sl.amount,
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sl.best_before_date,
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sl.purchased_date,
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sl.location_id,
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sl.shopping_location_id,
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IFNULL((SELECT price FROM products_price_history WHERE product_id = sl.product_id ORDER BY purchased_date DESC LIMIT 1), 0) AS price
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FROM stock_log sl
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JOIN (
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/*
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This subquery gets the ID of the stock_log row (per product) which referes to the last purchase transaction,
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while taking undone and edited transactions into account
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*/
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SELECT
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sl1.product_id,
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MAX(sl1.id) stock_log_id_of_last_purchase
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FROM stock_log sl1
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JOIN (
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/*
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This subquery finds the last purchased date per product,
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there can be multiple purchase transactions per day, therefore a JOIN by purchased_date
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for the outer query on this and then take MAX id of stock_log (of that day)
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*/
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SELECT
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sl2.product_id,
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MAX(sl2.purchased_date) AS last_purchased_date
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FROM stock_log sl2
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WHERE sl2.undone = 0
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AND (
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(sl2.transaction_type IN ('purchase', 'inventory-correction', 'self-production') AND sl2.stock_id NOT IN (SELECT stock_id FROM stock_edited_entries))
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OR (sl2.transaction_type = 'stock-edit-new' AND sl2.stock_id IN (SELECT stock_id FROM stock_edited_entries) AND sl2.id IN (SELECT stock_log_id_of_newest_edited_entry FROM stock_edited_entries))
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)
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GROUP BY sl2.product_id
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) x2
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ON sl1.product_id = x2.product_id
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AND sl1.purchased_date = x2.last_purchased_date
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WHERE sl1.undone = 0
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AND (
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(sl1.transaction_type IN ('purchase', 'inventory-correction', 'self-production') AND sl1.stock_id NOT IN (SELECT stock_id FROM stock_edited_entries))
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OR (sl1.transaction_type = 'stock-edit-new' AND sl1.stock_id IN (SELECT stock_id FROM stock_edited_entries) AND sl1.id IN (SELECT stock_log_id_of_newest_edited_entry FROM stock_edited_entries))
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)
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GROUP BY sl1.product_id
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) x
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ON sl.product_id = x.product_id
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AND sl.id = x.stock_log_id_of_last_purchase;
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-- Update products_last_purchased cache
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INSERT OR REPLACE INTO cache__products_last_purchased
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(product_id, amount, best_before_date, purchased_date, price, location_id, shopping_location_id)
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SELECT product_id, amount, best_before_date, purchased_date, price, location_id, shopping_location_id
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FROM products_last_purchased;
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