-- 增加入职电子签“作废后重新发起”能力。
-- 已执行 20260903_qiyuesuo_electronic_sign.sql 的数据库需要单独执行本文件。

SET NAMES utf8mb4;

ALTER TABLE `ob_electronic_sign_process`
    ADD COLUMN `IsCurrent` TINYINT(1) NULL DEFAULT NULL
        COMMENT '是否为任务当前电子签流程，历史流程为空'
        AFTER `BizId`;

ALTER TABLE `ob_electronic_sign_process`
    ADD COLUMN `ReissueReason` VARCHAR(500) NULL
        COMMENT '重新发起原因'
        AFTER `RetryCount`,
    ADD COLUMN `ReissuedAt` DATETIME(3) NULL
        COMMENT '被新流程替代时间'
        AFTER `ReissueReason`,
    ADD COLUMN `ReissuedByProcessId` BIGINT NULL
        COMMENT '替代当前流程的新流程Id'
        AFTER `ReissuedAt`;

-- 雪花 Id 与创建时间同序，每个任务只把最新一条流程标记为当前流程。
UPDATE `ob_electronic_sign_process` process
INNER JOIN (
    SELECT `TaskId`, MAX(`Id`) AS `LatestProcessId`
    FROM `ob_electronic_sign_process`
    GROUP BY `TaskId`
) latest ON latest.`LatestProcessId` = process.`Id`
SET process.`IsCurrent` = 1;

ALTER TABLE `ob_electronic_sign_process`
    ADD UNIQUE KEY `uk_ob_esign_process_current` (`TaskId`, `IsCurrent`);