21 lines
549 B
SQL
21 lines
549 B
SQL
-- 已有库增量：包裹明细增加商品图片 ImageUrl
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-- 可重复执行
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SET @col_exists := (
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SELECT COUNT(1)
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FROM information_schema.COLUMNS
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WHERE TABLE_SCHEMA = DATABASE()
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AND TABLE_NAME = 'C_parcel_item'
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AND COLUMN_NAME = 'ImageUrl'
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);
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SET @sql := IF(
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@col_exists = 0,
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'ALTER TABLE `C_parcel_item` ADD COLUMN `ImageUrl` VARCHAR(1024) NULL COMMENT ''商品图片URL'' AFTER `AttributeText`',
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'SELECT ''C_parcel_item.ImageUrl already exists'' AS info'
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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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