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ALTER TABLE swap_order
ADD COLUMN electricity_total_fee INT COMMENT '电费',
ADD COLUMN append_total_fee INT COMMENT '附加费',
ADD COLUMN total_fee INT COMMENT '总费用(所有的总费用)';
ALTER TABLE swap_order_step
ADD COLUMN step_type INT COMMENT '步骤类型（1：自动 2：手动）',
ADD COLUMN step_desc varchar(255) COMMENT '描述',
ADD COLUMN param text COMMENT '参数';
ALTER TABLE swap_order_battery
ADD COLUMN nominal_energy DECIMAL(24, 2) COMMENT '电池标称能量';
