应付配置文件导入保存该文件

bms-back/sql/price/pay_surcharge_price_unit.sql

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+-- 附加费的价格和货币分开。金额仍在 amount，货币和计费单位在 price_unit，如 EUR/ITEM。可重复执行。
+SET NAMES utf8mb4;
+
+SET @ddl = (
+  SELECT IF(
+    EXISTS (
+      SELECT 1 FROM information_schema.COLUMNS
+      WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'pay_surcharge' AND COLUMN_NAME = 'price_unit'
+    ),
+    'SELECT 1',
+    'ALTER TABLE pay_surcharge ADD COLUMN price_unit varchar(40) DEFAULT NULL COMMENT ''货币和计费单位，如EUR/ITEM、RMB/KG、%'' AFTER currency'
+  )
+);
+PREPARE stmt FROM @ddl;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;