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22 lines
895 B
22 lines
895 B
-- 补 product.serialcursor（产品级授权码序号游标，新代码 allocSerialRange 依赖它）
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-- 初值 = 该产品现有授权码的 max(number)，让新批次序号接在老数据之后。
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\set ON_ERROR_STOP on
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BEGIN;
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ALTER TABLE product ADD COLUMN IF NOT EXISTS serialcursor bigint DEFAULT 0;
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UPDATE product SET serialcursor = 0 WHERE serialcursor IS NULL;
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DO $$
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DECLARE p record; tbl text; mx bigint;
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BEGIN
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FOR p IN SELECT id FROM product ORDER BY id LOOP
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tbl := format('license_%s', to_hex(p.id));
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IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_schema='public' AND table_name = tbl) THEN
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EXECUTE format('SELECT COALESCE(MAX(number), 0) FROM %I', tbl) INTO mx;
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-- 只抬高不降低，重复执行安全
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UPDATE product SET serialcursor = GREATEST(COALESCE(serialcursor, 0), mx) WHERE id = p.id;
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END IF;
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END LOOP;
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END $$;
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COMMIT;
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