caojia
18 lines
726 B
SQL
18 lines
726 B
SQL
-- 附加费增加可计算条件。已有库可重复执行。
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SET NAMES utf8mb4;
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SET @sql = (
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SELECT IF(
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COUNT(*) = 0,
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'ALTER TABLE pay_surcharge
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ADD COLUMN calc_rule varchar(20) NOT NULL DEFAULT ''MANUAL'' COMMENT ''计费条件：ALWAYS每票、POSTCODE邮编、WEIGHT超重、SIZE超尺寸、RETURN退件、MANUAL人工'' AFTER charge_timing,
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ADD COLUMN calc_param varchar(1000) DEFAULT NULL COMMENT ''条件参数，如邮编、重量阈值、尺寸表达式'' AFTER calc_rule',
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'SELECT 1'
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)
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FROM information_schema.COLUMNS
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WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'pay_surcharge' AND COLUMN_NAME = 'calc_rule'
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);
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PREPARE stmt FROM @sql;
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EXECUTE stmt;
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DEALLOCATE PREPARE stmt;
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