På mandag 13. november 2017 kl. 19:07:53, skrev Peter Geoghegan <p...@bowt.ie 
<mailto:p...@bowt.ie>>:
On Mon, Nov 13, 2017 at 12:27 AM, Andreas Joseph Krogh
 <andr...@visena.com> wrote:
 > In PG-10, with ICU enabled, is abbreviated keys now enabled?

 Yes. ICU will use abbreviated keys on every platform, including Windows.

 > If so, using locale=nb_NO.UTF-8, do I have to use a ICU-specific locale to 
take advantage of abbreviated keys?

 You need to use an ICU collation. It must be a per-column collation,
 as you cannot currently use ICU for an entire database. (This
 limitation should be removed in the next release or two.)
 
Ok, so I have to explicitly specify like this:
 
create table test(id serial primary key, name varchar collate "nb_NO" not 
null);
  
Will ICU be used here as long as PG is compiled with ICU-suppoert, as the 
debian-packages are, or do I have to specify collation-provider?
 
Do I have to explicitly specify collation when using ORDER by on that column 
for index and abbreviated keys to be used?
 
Thanks.
 
-- Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
andr...@visena.com <mailto:andr...@visena.com>
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