Re: [HACKERS] Surjective functional indexes

On 29.05.2017 20:21, Christoph Berg wrote:
>
> I think the term you were looking for is "projection".
>
> https://en.wikipedia.org/wiki/Projection_(set_theory)

I have already renamed parameter from "surjective" to "injective".
But I am ok to do do one more renaming to "projection" if it will be 
considered as better alternative.From my point of view, "projection" seems to be clearer for people 
without mathematical background,
but IMHO this term is overloaded in DBMS context. The irony is that in 
Wikipedia "projection" is explained using "surjection" term:)

>
> Christoph

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Konstantin Knizhnik
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