This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
ALTER TABLE `cons_video_detection`
ADD COLUMN `project_id` bigint(20) NULL COMMENT '项目ID（根据摄像机分配关系反查）' AFTER `stream_id`,
ADD COLUMN `video_url` varchar(512) NULL COMMENT '原始视频URL' AFTER `img_url`,
ADD COLUMN `is_first` char(1) NULL COMMENT '是否首帧：0否 1是' AFTER `video_url`;