Wei Shan wrote:
> But the same version of glibc will be different on RHEL6/RHEL7 isn't it?
>
> Look here: http://distrowatch.com/table.php?distribution=redhat
I don't understand.
RHEL6 has glibc 2.12, RHEL 7 has 2.17.
As I showed, at least the German collations for these versions are different.
PostgreSQL uses the operating system's collations.
So indexes using the same collation can be sorted differently on RHEL6 and RHEL7.
Yours,
Laurenz Albe