优化代码

mec-biz/src/main/resources/config/mybatis/ImLiveRoomBlackMapper.xml

@@ -30,7 +30,7 @@
         real_name_ as realName,
         phone_     as phone
         from sys_user
-        where find_in_set('STUDENT', a.user_type_)
+        where find_in_set('STUDENT', user_type_)
         and lock_flag_ = 0
         and del_flag_ = 0
         and tenant_id_ = 1