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16 lines
434 B
SQL
16 lines
434 B
SQL
DROP TRIGGER qu_conversions_inverse_UPD;
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CREATE TRIGGER qu_conversions_inverse_UPD AFTER UPDATE ON quantity_unit_conversions
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BEGIN
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/*
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Update the inverse QU conversion
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*/
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UPDATE quantity_unit_conversions
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SET factor = 1 / IFNULL(NEW.factor, 1),
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from_qu_id = NEW.to_qu_id,
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to_qu_id = NEW.from_qu_id
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WHERE from_qu_id = OLD.to_qu_id
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AND to_qu_id = OLD.from_qu_id
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AND IFNULL(product_id, -1) = IFNULL(NEW.product_id, -1);
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END;
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