"Pavel Stehule" <[EMAIL PROTECTED]> writes:
> Is possible casting domain?

No, because find_coercion_pathway() expects that only base types are
listed in pg_cast, so it starts by stripping domains.  Function lookup
tends to do that too, so it's hard even to declare a function as taking
a domain.

Elein was going to look into devising a more domain-friendly set of
type coercion rules, but I dunno if she's made any progress.

                        regards, tom lane

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