| From: | Francisco J Reyes <fran(at)natserv(dot)net> |
|---|---|
| To: | Jochem van Dieten <jochemd(at)oli(dot)tudelft(dot)nl> |
| Cc: | pgsql General List <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Domains (Was [PERFORM] Views With Unions) |
| Date: | 2003-08-02 18:25:09 |
| Message-ID: | 20030802142257.S99004@zoraida.natserv.net |
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| Thread: | |
| Lists: | pgsql-general |
On Sat, 2 Aug 2003, Jochem van Dieten wrote:
> Francisco J Reyes wrote:
> > Are domains user defined types? That they seem to be based on what I see
> > on the docs.
>
> They are similar a bit to user defined types,
......
>
> Please note that the SQL:1999 concept of user defined types is
> quite different from the one in PostgreSQL (in his book "Advanced
> SQL:1999" Jim Melton even warns that domains may be deprecated in
> future SQL standards in favour of SQL-style user defined types).
Thanks for the explanation and the warning. Based on your feedback, don't
quite see how domains would be usefull to me so I will not use them for
now.
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