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56 lines
2.8 KiB
MySQL
56 lines
2.8 KiB
MySQL
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DROP TRIGGER prevent_qu_stock_change_after_first_purchase;
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CREATE TRIGGER cascade_change_qu_id_stock AFTER UPDATE ON products WHEN NEW.qu_id_stock != OLD.qu_id_stock
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BEGIN
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-- All amounts anywhere are related to the products stock QU,
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-- so apply the appropriate unit conversion to all amounts everywhere on change
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-- (and enforce that such a conversion need to exist when the product was once added to stock)
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SELECT CASE WHEN((
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SELECT 1
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FROM quantity_unit_conversions_resolved
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WHERE product_id = NEW.id
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AND from_qu_id = OLD.qu_id_stock
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AND to_qu_id = NEW.qu_id_stock
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AND source NOT LIKE '1%'
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) ISNULL)
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AND
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((
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SELECT 1
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FROM stock_log
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WHERE product_id = NEW.id
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AND NEW.qu_id_stock != OLD.qu_id_stock
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) NOTNULL) THEN RAISE(ABORT, "qu_id_stock can only be changed when a corresponding QU conversion (old QU => new QU) exists when the product was once added to stock") END;
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UPDATE chores
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SET product_amount = product_amount * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock AND source NOT LIKE '1%'), 1.0)
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WHERE product_id = NEW.id;
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UPDATE meal_plan
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SET product_amount = product_amount * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock AND source NOT LIKE '1%'), 1.0)
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WHERE type = 'product'
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AND product_id = NEW.id;
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UPDATE product_barcodes
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SET amount = amount * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock AND source NOT LIKE '1%'), 1.0)
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WHERE product_id = NEW.id
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AND amount IS NOT NULL;
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UPDATE recipes_pos
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SET amount = amount * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock AND source NOT LIKE '1%'), 1.0)
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WHERE product_id = NEW.id;
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UPDATE shopping_list
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SET amount = amount * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock AND source NOT LIKE '1%'), 1.0)
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WHERE product_id = NEW.id
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AND product_id IS NOT NULL;
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UPDATE stock
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SET amount = amount * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock AND source NOT LIKE '1%'), 1.0)
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WHERE product_id = NEW.id;
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UPDATE stock_log
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SET amount = amount * IFNULL((SELECT factor FROM quantity_unit_conversions_resolved WHERE product_id = NEW.id AND from_qu_id = OLD.qu_id_stock AND to_qu_id = NEW.qu_id_stock AND source NOT LIKE '1%'), 1.0)
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WHERE product_id = NEW.id;
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END;
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