wuweihua
15 lines
744 B
SQL
15 lines
744 B
SQL
-- Add expire_date for product country versioning on re-import
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-- When new effective_date is later than previous, keep old rows and set their expire_date = new effective_date
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SET NAMES utf8mb4;
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ALTER TABLE bms_product_country
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ADD COLUMN expire_date date DEFAULT NULL COMMENT 'expire date (null=open; set to next import effective_date)' AFTER effective_date;
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-- Allow multiple versions: unique includes effective_date
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ALTER TABLE bms_product_country DROP INDEX uk_product_country_weight;
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ALTER TABLE bms_product_country
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ADD UNIQUE KEY uk_product_country_weight_eff (product_code, country_name, weight_min, weight_max, effective_date);
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ALTER TABLE bms_product_country
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ADD KEY idx_product_eff (product_code, effective_date, expire_date);
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