CREATE TABLE `refund_flow_logs` (
    `id`               BIGINT      NOT NULL AUTO_INCREMENT COMMENT '主键ID',
    `created_at`       BIGINT      NOT NULL DEFAULT 0 COMMENT '创建时间',
    `updated_at`       BIGINT      NOT NULL DEFAULT 0 COMMENT '更新时间',
    `deleted_at`       BIGINT      NOT NULL DEFAULT 0 COMMENT '删除时间（0 表示未删除）',
    `created_by`       BIGINT      NOT NULL DEFAULT 0 COMMENT '创建人',
    `updated_by`       BIGINT      NOT NULL DEFAULT 0 COMMENT '更新人',
    `deleted_by`       BIGINT      NOT NULL DEFAULT 0 COMMENT '删除人',
    `order_id`         BIGINT      NOT NULL DEFAULT 0 COMMENT '关联订单ID',
    `order_no`         VARCHAR(64) NOT NULL DEFAULT '' COMMENT '商户订单号（冗余，方便查询）',
    `user_id`          BIGINT      NOT NULL DEFAULT 0 COMMENT '用户ID（冗余，方便按用户查）',
    `refund_no`        VARCHAR(64) NOT NULL DEFAULT '' COMMENT '商户退款单号',
    `wechat_refund_no` VARCHAR(64) NOT NULL DEFAULT '' COMMENT '微信退款单号',
    `refund_amount`    BIGINT      NOT NULL DEFAULT 0 COMMENT '本次退款金额（分）',
    `refund_reason`    VARCHAR(255) NOT NULL DEFAULT '' COMMENT '退款原因',
    `status`           TINYINT     NOT NULL DEFAULT 0 COMMENT '退款状态 0=待处理 1=退款中 2=退款成功 3=退款失败',
    `apply_time`       BIGINT      NOT NULL DEFAULT 0 COMMENT '申请时间',
    `success_time`     BIGINT      NOT NULL DEFAULT 0 COMMENT '退款成功时间',
    `fail_reason`      VARCHAR(255) NOT NULL DEFAULT '' COMMENT '失败原因',
    `callback_raw`     TEXT        COMMENT '微信退款回调原始报文',
    PRIMARY KEY (`id`),
    UNIQUE KEY `uk_refund_flow_no` (`refund_no`),
    KEY `idx_refund_flow_order` (`order_id`),
    KEY `idx_refund_flow_user` (`user_id`)
) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4 COMMENT = '退款流水日志表';