start transaction;
create table tbl_xy (x int , y int);
insert into tbl_xy values (0,0);
insert into tbl_xy values (1,1);
commit;

start transaction;
insert into tbl_xy values (2,2);
insert into tbl_xy values (3,3);
insert into tbl_xy values (4,4);
commit;

start transaction;
insert into tbl_xy values (5,5);
insert into tbl_xy values (6,6);
insert into tbl_xy values (7,7);
commit;


insert into tbl_xy values (-1, -100);


start transaction;
insert into tbl_xy values (8,8);
insert into tbl_xy values (9,9);
insert into tbl_xy values (10,10);
commit;

select * from tbl_xy;

drop table tbl_xy;
