On Sun, Jul 1, 2012 at 5:11 AM, Alexander Korotkov <aekorot...@gmail.com> wrote:
>> MULE also looks problematic.  The code that you've written isn't
>> symmetric with the opposite conversion, unlike what you did in all
>> other cases, and I don't understand why.  I'm also somewhat baffled by
>> the reverse conversion: it treats a multi-byte sequence beginning with
>> a byte for which IS_LCPRV1(x) returns true as invalid if there are
>> less than 3 bytes available, but it only reads two; similarly, for
>> IS_LCPRV2(x), it demands 4 bytes but converts only 3.
>
> Should we save existing pg_wchar representation for MULE encoding? Probably,
> we can modify it like in 0.1 version of patch in order to make it more
> transparent.

Changing the encoding would break pg_upgrade, so -1 from me on that.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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