Re: We have to support ANSI encoding...

> -----Original Message-----
> From: Johann Zuschlag [mailto:zuschlag2@online.de]
> Sent: 20 September 2005 15:08
> To: Dave Page
> Cc: pgsql-odbc@postgresql.org
> Subject: We have to support ANSI encoding...
>
> Hi Dave,
>
> I hope, that we can keep two drivers for the future. In fact
> we have to.
> Just note the excerpt of the PostgreSQL docs below:
>
>
> 20.1.2. Behavior
>
> Locale support influences the following features:
>
>     * Sort order in queries using ORDER BY
>     * The ability to use indexes with LIKE clauses
>     * The |to_char| family of functions
>
> The drawback of using locales other than C or POSIX in
> PostgreSQL is its
> performance impact. It slows character handling and prevents ordinary
> indexes from being used by LIKE. For this reason use locales
> only if you
> actually need them.
>
>
>
> So because of performance reasons we don't want to use UTF-8
> always. The
> conclusion is that we must support both drivers.

Yeah, I'm pretty much resigned to that now - in fact, the only
alternative I can see is to convert incoming strings from the local
charset to ucs-2 in the *W functions of the Unicode driver - that seems
to be what the SQL Server driver does (it's configurable behaviour in
fact). Of course, that would reduce performance even further :-(

/D