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	<dcc563d10708101523y6621f875w430bb1be0ff273f5@mail.gmail.com>
Date: Fri, 10 Aug 2007 19:37:56 -0300 (ART)
Subject: Re: foreign key pointing to diff schema?
From: gherzig@fmed.uba.ar
To: "Scott Marlowe" <scott.marlowe@gmail.com>
Cc: pgsql-sql@postgresql.org
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> On 8/10/07, gherzig@fmed.uba.ar <gherzig@fmed.uba.ar> wrote:
>> Hi all. Can i make a FK who points a table in a different schema? Or
>> this
>> is implemented via a trigger by my own?
>
> Sure.  just prefix the table name with the schemaname and a .
>
> create schema abc;
> alter user me set search_path='abc', 'public';
> create table z1 (id int primary key);
>  \d z1
>         Table "abc.z1"
>  Column |  Type   | Modifiers
> --------+---------+-----------
>  id     | integer | not null
> Indexes:
>     "z1_pkey" PRIMARY KEY, btree (id)
>
> (Note the abc.z1 there)
> create schema test3;
>  create table test3.z2 (id int primary key, z1id int references
> abc.z1(id));
> \d test3.z2
>        Table "test3.z2"
>  Column |  Type   | Modifiers
> --------+---------+-----------
>  id     | integer | not null
>  z1id   | integer |
> Indexes:
>     "z2_pkey" PRIMARY KEY, btree (id)
> Foreign-key constraints:
>     "z2_z1id_fkey" FOREIGN KEY (z1id) REFERENCES z1(id)
>
>
> basically, schemas are just distinct name spaces.
>
Im sory, that was just a matter of trying and see, isnt? I guess i need a
beer :) Thanks for the example and the explanation!

Gerardo