feat(aiot): 添加camera_code字段迁移脚本 - 解决摄像头标识问题

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

数据库/aiot/迁移-添加camera_code字段.sql

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+-- 迁移-添加camera_code字段.sql
+-- 功能：为 wvp_stream_proxy 表添加 camera_code 字段作为全局唯一标识
+
+-- 1. 新增 camera_code 列（允许NULL，稍后填充数据）
+ALTER TABLE wvp_stream_proxy
+  ADD COLUMN camera_code VARCHAR(64) NULL COMMENT '摄像头全局唯一编码（格式：cam_xxxxxxxxxxxx）';
+
+-- 2. 为现有数据生成 camera_code（基于 ID 生成12位哈希）
+UPDATE wvp_stream_proxy
+  SET camera_code = CONCAT('cam_', SUBSTRING(MD5(CAST(id AS CHAR)), 1, 12))
+  WHERE camera_code IS NULL OR camera_code = '';
+
+-- 3. 将 camera_code 设为 NOT NULL 并添加唯一索引
+ALTER TABLE wvp_stream_proxy
+  MODIFY COLUMN camera_code VARCHAR(64) NOT NULL,
+  ADD UNIQUE KEY uk_camera_code (camera_code);
+
+-- 4. 验证数据完整性
+SELECT '检查重复的 camera_code' AS check_name, COUNT(*) AS issue_count
+FROM (
+  SELECT camera_code, COUNT(*) AS cnt
+  FROM wvp_stream_proxy
+  GROUP BY camera_code
+  HAVING cnt > 1
+) AS duplicates;
+
+-- 5. 更新 ROI 表中的 camera_id（从 app/stream 格式改为 camera_code）
+UPDATE wvp_ai_roi r
+  INNER JOIN wvp_stream_proxy sp ON r.camera_id = CONCAT(sp.app, '/', sp.stream)
+  SET r.camera_id = sp.camera_code;
+
+-- 6. 验证 ROI 更新结果
+SELECT '检查未匹配的 ROI' AS check_name, COUNT(*) AS issue_count
+FROM wvp_ai_roi r
+LEFT JOIN wvp_stream_proxy sp ON r.camera_id = sp.camera_code
+WHERE sp.camera_code IS NULL;
+
+-- 7. 显示迁移后的样本数据
+SELECT id, camera_code, app, stream, name
+FROM wvp_stream_proxy
+LIMIT 5;
+
+SELECT roi_id, camera_id, name
+FROM wvp_ai_roi
+LIMIT 5;