Re: BUG #15805: Problem with lower function for greek sigma (Σ) letter

On 2019-May-15, Daniel Gustafsson wrote:

> > I see unexpected behaviour of lower function for greek sigma letter Σ.
> > According to wikipedia (https://en.wikipedia.org/wiki/Sigma) if this letter
> > is in final word position, it should be ς in lowercase, and not σ. But
> > PotgreSQL lower function returns σ, for example lower('ΔΗΜΟΤΕΣ ΦΑΙΣΤΟΥ') =
> > "δημοτεσ φαιστου" instead of "δημοτες φαιστου". So if I try to pass this
> > lower string from another part of a system (java code, for example) Postgre
> > will not return this row cause it differs from java-generated one.
>
> This is indeed a bug, and a rare occurrence since AFAICT from ISO 30112 and
> googling there is only a single case of word-final lowercasing which is this
> sigma. The attached patch takes a stab at fixing this.

Ummm ... isn't this a counterexample?
https://hebrew4christians.com/Grammar/Unit_One/Final_Forms/final_forms.html

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Álvaro Herrera https://www.2ndQuadrant.com/
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