Hi all I upgrade my glibc version from 2.17 to 2.34. I found that my postgre "order by" sql has the different order list. select * from t1 order by name asc. Before results: glibc 2.17 A2 A_2 After results: glibc 2.34 A_2 A2 Could you help me to find the reasons for this? Thanks! Lisa