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-- 为 account_transaction 表添加 call_id 字段
-- 用于关联冻结单释放时的调用ID
ALTER TABLE `account_transaction`
ADD COLUMN `call_id` varchar(100) DEFAULT NULL COMMENT '调用ID，关联冻结单' AFTER `business_type`;
-- 添加索引以提高查询性能
ADD INDEX `idx_call_id` (`call_id`);