ALTER TABLE `zh_material_list_gcl` ADD `old_quantity` DECIMAL(30,8) NULL DEFAULT NULL COMMENT '数量，用于复原数据' AFTER `expr`,
ADD `old_expr` VARCHAR(255) NULL DEFAULT NULL COMMENT '公式，用于复原数据' AFTER `old_quantity`;

UPDATE `zh_material_list_gcl` SET `old_quantity`=`quantity`,`old_expr`=`expr`;

ALTER TABLE `zh_material` ADD `exponent_rate` TINYINT(3) NULL DEFAULT '0' COMMENT '材料税税率' AFTER `rate`;

UPDATE `zh_material` SET `exponent_rate`=`rate`;