-- 更新生产环境数据库播课字段
-- 日期: 2025-10-14
-- 说明: 清理旧的异步状态字段，只保留必要的播课字段

USE kaopeilian;

-- 查看当前字段结构
SELECT COLUMN_NAME, COLUMN_TYPE, IS_NULLABLE, COLUMN_COMMENT 
FROM INFORMATION_SCHEMA.COLUMNS 
WHERE TABLE_SCHEMA = 'kaopeilian' 
AND TABLE_NAME = 'courses' 
AND COLUMN_NAME LIKE 'broadcast%'
ORDER BY COLUMN_NAME;