On Wed, Sep 20, 2017 at 4:04 PM, Peter Eisentraut
<peter.eisentraut@2ndquadrant.com> wrote:
> ICU <54 doesn't even support the BCP 47 style, so we need to keep
> supporting the old/other style anyway.
Yes it does -- just not as a native locale name. ucol_open()
apparently became more liberal in what it would accept in ICU 54.
>> And, I think that I
>> see a bigger problem: we pass a string that is almost certainly a BCP
>> 47 string to ucol_open() from within pg_newlocale_from_collation(). We
>> do so despite the fact that ucol_open() apparently doesn't accept BCP
>> 47 syntax locale strings until ICU 54 [1].
>
> pg_import_system_collations() takes care to use the non-BCP-47 style for
> such versions, so I think this is working correctly.
But CREATE COLLATION doesn't use pg_import_system_collations().
--
Peter Geoghegan
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