Re: Cannot declare record members NOT NULL
| От | Cultural Sublimation |
|---|---|
| Тема | Re: Cannot declare record members NOT NULL |
| Дата | |
| Msg-id | 201445.51014.qm@web63413.mail.re1.yahoo.com обсуждение исходный текст |
| Ответ на | Re: Cannot declare record members NOT NULL (Tom Lane <tgl@sss.pgh.pa.us>) |
| Ответы |
Re: Cannot declare record members NOT NULL
Re: Cannot declare record members NOT NULL |
| Список | pgsql-general |
> Unfortunately for you, they are not different types. If the OCaml
> binding thinks they are, it's the binding's problem; especially since
> the binding seems to be using a completely lame method of trying to tell
> the difference.
Hi,
In OCaml and in other languages with strong type systems, "int4 never NULL"
and "int4 possibly NULL" are definitely different types. I think the source
of the problem here is that SQL has a different philosophy, one where type
constraints are not seen as creating new types.
But anyway if you think that checking pg_attribute is a lame method of
obtaining type information, what do you suggest should be done instead?
What would you do if it were you creating the bindings?
Thanks,
C.S.
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