mysql 5.7查找递归树下的所有子任务

select * from  (SELECT     team_task_temp.*  FROM     ( SELECT * FROM team_task  ) team_task_temp,     ( SELECT @pv := '825a43a940664a54b4bf20278b5e8952' ) initialisation  WHERE     find_in_set( pcode, @pv )      AND length(     @pv := concat( @pv, ',', CODE ))     union      SELECT * FROM team_task  where code = '825a43a940664a54b4bf20278b5e8952'     ) a     where a.begin_time='2022-04-11'