John Sidney-Woollett <[EMAIL PROTECTED]> writes:
> Do upper() and lower() only work correctly for postgres v8 UTF-8 encoded 
> databases? (They don't seem to work on chars > standard ascii on my 
> 7.4.6 db). Is this locale or encoding specific issue?

Before 8.0, they don't work on multibyte characters, period.  In 8.0
they work according to your locale setting.

> Is there likely to be a significant difference in speed between a 
> database using a UTF-8 locale and the C locale (if you don't care about 
> the small issues you detailed below)?

I'd expect the C locale to be materially faster for text sorting.
Don't have a number offhand.

                        regards, tom lane

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