Since when does "." sort as "nothing at all"
This select

   select
           distinct u.user_name
   from
           subscriber_user u,
           subscription s,
           subscription_template t
   where
           u.id = s.subscriber_entity_id
           and s.template_id = t.id
           and t.application_id = (select id from application where
   short_name ='books')
   order by u.user_name
   \p\g

over this table def.(for user_name)

    \d subscriber_user
             Table "public.subscriber_user"
   +-----------------------+---------+---------------+
   |        Column         |  Type   |   Modifiers   |
   +-----------------------+---------+---------------+
   | id                    | bigint  | not null      |
   | last_name             | text    |               |
   | first_name            | text    |               |
   | user_name             | text    |               |
   | email_address         | text    |               |
   | force_password_change | boolean | default false |
   | title                 | text    |               |
   +-----------------------+---------+---------------+
   Indexes:
       "subscriber_user_pkey" PRIMARY KEY, btree (id)
       "idx__subscriber_users__lower_email_address" UNIQUE, btree
   (lower(email_address))
       "idx__subscriber_users__lower_user_name" UNIQUE, btree
   (lower(user_name))
   Foreign-key constraints:
       "subscriber_user_id_fkey" FOREIGN KEY (id) REFERENCES subscriber(id)


is producing this sorted??? output


   | adrianoha...@hotmail.com                   |
   | adx...@show.org.tw                         |
   | aeche...@mac.com                           |
   | a.eck...@gmx.de                            |
   | aelef...@unina.it                          |
   | aeo...@hotmail.com                         |
   | a.fisched...@t-online.de                   |
   | aflores3...@gmail.com                      |
   | afr...@advancedneurosurgeons.com           |
   | agave...@comcast.net                       |
   | agelsin...@amirsys.com                     |
   | agis1...@yahoo.gr                          |

using this client

   Welcome to psql 8.3.7, the PostgreSQL interactive terminal.

and this server

   show server_version;
   +----------------+
   | server_version |
   +----------------+
   | 8.3.7          |
   +----------------+
   (1 row)

   nsm=# show server_encoding

   +-----------------+
   | server_encoding |
   +-----------------+
   | UTF8            |
   +-----------------+
   (1 row)





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