Re: [HACKERS] Data types

> I haven't gotten farther than this yet, but it seems like any solution
> has _got_ to take advantage of some of the existing type mechanisms so
> that we have access to input/output routines for the type support info.
> SQL doesn't naturally lend itself to full OO extensibility, but perhaps
> we can extend the backend to handle syntax like
>
>   typename(characteristic, characteristic,...)
>
> where the characteristics have properties stored in the type/attribute
> system and the backend knows how to meld the type with the support type
> info (e.g. typeOutput = print("%s(%s)", typename, printTypeSupport) ).
>
> Does this ring a bell with anyone? Vadim?

How does atttypmod fit/not fit the need here?  It is passed to all
input/output functions.

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