Re: polymorphic SQL functions has a problem with domains

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От Tom Lane
Тема Re: polymorphic SQL functions has a problem with domains
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Msg-id 16561.1396456050@sss.pgh.pa.us
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Ответ на Re: polymorphic SQL functions has a problem with domains  (David Johnston <polobo@yahoo.com>)
Ответы Re: polymorphic SQL functions has a problem with domains  (Pavel Stehule <pavel.stehule@gmail.com>)
Re: polymorphic SQL functions has a problem with domains  (Andres Freund <andres@2ndquadrant.com>)
Re: polymorphic SQL functions has a problem with domains  (David Johnston <polobo@yahoo.com>)
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David Johnston <polobo@yahoo.com> writes:
> Does something like:
> SELECT ($1 + $2)::$1%TYPE 
> exist where you can explicitly cast to the type of the input argument?

I don't think SQL-language functions have such a notation, but it's
possible in plpgsql, if memory serves.
        regards, tom lane

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