\r

set session range_optimizer_max_mem_size=1024*1024*128;
drop table if exists t;
create table t(a int, b int,c int,d int,e int,f int, g int,primary key(a,b,c,d,e,g))engine=innodb;
insert into t values(1,1,1,1,1,1,1),(2,2,2,2,2,2,2),(3,3,3,3,3,3,3);
drop table if exists r;
create table r(a serial,ranges int, memory int,query_lengt int);

drop procedure if exists p;
delimiter $
create procedure p(max_ranges int)
begin
  declare v_j int default 0;
  declare v_i int default 0;
  truncate r;
  endme: begin
  repeat
    set v_i:=0;
    set @v_sql='select count(*) from t where ';
    repeat
      set @v_sql:=concat(@v_sql,'(a=',v_i,' and b=',v_i,' and c=',v_i,' and d=',v_i,' and e=',v_i,' and f=',v_i,' and g=',v_i,') or ');
      set v_i:=v_i+1;
    until v_i > v_j -1 end repeat;
    set @v_sql:=concat(@v_sql,'(a=',v_i,' and b=',v_i,' and c=',v_i,' and d=',v_i,' and e=',v_i,' and f=',v_i,' and g=',v_i,') into @a');
    -- select @v_sql;
    prepare s from @v_sql;
    execute s;
    show warnings;
    deallocate prepare s;
    
    select HIGH_NUMBER_OF_BYTES_USED as range_memory  from 
      performance_schema.memory_summary_by_thread_by_event_name a,performance_schema.threads b 
      where b.processlist_id=connection_id() and a.thread_id=b.thread_id and event_name='memory/sql/test_quick_select' into @mem;
    
    select v_j as 'ranges', @mem as 'range memory';
    insert into r(ranges,memory,query_lengt) values(v_j,@mem,length(@v_sql));
    if @mem >= @@range_optimizer_max_mem_size then
       select 'aborting due to limit hit!' as 'msg';
       leave endme;
    end if;
    
    set v_j:=v_j+50;
  until v_j >= max_ranges end repeat;
  end endme;
end $
delimiter ;

call p(1000000);
select ranges,memory,query_lengt from r order by a desc limit 10;