problem for o/p

sir,

i'am getting different o/p for the same program code as well as the data base is the same .twice the output is being printed on some machines whereas correct o/p on some.the program code is

create or replace function f() return int4 as'

c1 cursor for select empname from emp;

e1 emp.ename%type;

begin

open c1;

loop

fetch c1 into e1;

exit when not found;

raise notice ' 'emp name %' ', e1;

end loop;

close c1;

return 1;

end;

'language 'plpgsql';