-- 修改后的用户任务进度表（关联到任务达成条件）
DROP TABLE IF EXISTS `kku_task_user_progress`;
CREATE TABLE `kku_task_user_progress` (
  `id` int NOT NULL AUTO_INCREMENT COMMENT '记录ID，主键',
  `user_id` int NOT NULL COMMENT '用户ID',
  `task_id` int NOT NULL COMMENT '任务ID，外键关联kku_task_tasks表',
  `achievement_condition_id` int NOT NULL COMMENT '达成条件ID，外键关联kku_task_achievement_conditions表',
  `current_value` int NOT NULL DEFAULT '0' COMMENT '当前值',
  `last_update_time` timestamp NULL DEFAULT NULL COMMENT '最后更新时间',
  `created_at` timestamp NULL DEFAULT NULL COMMENT '创建时间',
  `updated_at` timestamp NULL DEFAULT NULL COMMENT '更新时间',
  PRIMARY KEY (`id`),
  UNIQUE KEY `idx_user_task_condition` (`user_id`, `task_id`, `achievement_condition_id`),
  KEY `idx_user_task` (`user_id`, `task_id`),
  KEY `idx_achievement_condition` (`achievement_condition_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='用户任务进度表';