    Locale and sorting behavior (order by)
    --------------------------------------

    The sorting behavior in the PostgreSQL database, and therefore in RT,
    can change depending on the locale settings. RT is commonly run with
    locales like en_US.UTF-8, en_GB.UTF-8, etc., which will process sort
    order in a case-insensitive way. Other locales, like C.UTF-8, are
    case sensitive. If you see unexpected sort order in RT, either after
    an initial installation or after an upgrade, confirm that the locale
    is set correctly.

    More information: https://www.postgresql.org/docs/12/locale.html