分组概念

initialize/migrate/database/02145_subscribe_traffic_limit.up.sql

@@ -0,0 +1,22 @@
+-- Purpose: Add traffic_limit rules to subscribe
+-- Author: Claude Code
+-- Date: 2026-03-12
+
+-- ===== Add traffic_limit column to subscribe table =====
+SET @column_exists = (
+  SELECT COUNT(*)
+  FROM INFORMATION_SCHEMA.COLUMNS
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'subscribe'
+    AND COLUMN_NAME = 'traffic_limit'
+);
+
+SET @sql = IF(
+  @column_exists = 0,
+  'ALTER TABLE `subscribe` ADD COLUMN `traffic_limit` TEXT NULL COMMENT ''Traffic Limit Rules (JSON)'' AFTER `node_group_id`',
+  'SELECT ''Column traffic_limit already exists in subscribe table'''
+);
+
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;