From: | Franco Bruno Borghesi <franco(at)akyasociados(dot)com(dot)ar> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Aaron Bratcher <aaronbratcher(at)abdatatools(dot)com>, pgsql-general(at)postgresql(dot)org |
Subject: | Re: newbie question... how do I get table structure? |
Date: | 2004-02-06 17:33:37 |
Message-ID: | 1076088817.12238.13.camel@taz.oficina.oficina |
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Lists: | pgsql-general |
that's great, I didn't know about the information schema... guess I
never read the 'what's new' document :)
On Fri, 2004-02-06 at 13:15, Tom Lane wrote:
> Franco Bruno Borghesi <franco(at)akyasociados(dot)com(dot)ar> writes:
> > Does anyone know if the ansi sql standard defines any way to do this?
> > I've seen the DESCRIBE TABLE/INDEX/... or SHOW TABLE/INDEX/... commands
> > in other databases, but I don't really know if they are extensions or
> > not.
>
> They are extensions (and very nonstandard ones at that). What the SQL
> standard provides are standardized views of the system catalogs located
> in the INFORMATION_SCHEMA schema. The per-spec way to do this would
> be something like
>
> select column_name, data_type
> from information_schema.columns
> where table_name = 'foo'
> order by ordinal_position;
>
> Now Postgres only got around to supporting the INFORMATION_SCHEMA views
> in 7.4 (although in principle you could have defined most of these views
> earlier, certainly in 7.3). I'm not real sure how many other DBs
> support INFORMATION_SCHEMA either ... it may not be all that "standard".
>
> regards, tom lane
>
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