I'm not sure I am doing this right but the code below return 0. Shouldn't it be 10?

        select @startId:= 0;

        select id 
        from tableA a 
        where id>@startId
          and   id not in (select id from tableB) 
        order by id 
        limit 10;

        select @this_id:= MAX(id) from tableA;