two tables - foreign keys referring to each other... - Mailing list pgsql-general

From Chris Czeyka
Subject two tables - foreign keys referring to each other...
Date
Msg-id 3A93366B.DC0B83F4@skwea.co.jp
Whole thread Raw
Responses Re: two tables - foreign keys referring to each other...
Re: [SQL] two tables - foreign keys referring to each other...
List pgsql-general
Hey to all,

I got two tables, linked to each other. How can I tell the first CREATE TABLE
(institute_t) to wait to check the foreign key for the second table??? just
like "hold on a little bit... you'll receive your admin_t" :-) ? I thoght
DEFERRABLE, DEFERRED and transaction with BEGIN/COMMIT take care of this.

..or generally: how do you create two crosslinked foreign keyed tables?

hopefully an easy problem for the real professionals!


-----------------> here we go
BEGIN; -- begin table transaction -- Only Postgresql
CREATE TABLE institute_t (
        name            VARCHAR(48) PRIMARY KEY,
        street          VARCHAR(48) NOT NULL,
        zip             VARCHAR(16),
        town            VARCHAR(32) NOT NULL,
        country         CHAR(2) NOT NULL, /* country codes ISO-3166*/
        phone           VARCHAR(32) NOT NULL,
        fax             VARCHAR(32),
        admin           VARCHAR(16) REFERENCES admin_t
                ON UPDATE CASCADE
                ON DELETE SET NULL
                DEFERRABLE
                INITIALLY DEFERRED
);

CREATE TABLE admin_t (
        login           VARCHAR(16) PRIMARY KEY,
        password        VARCHAR(16) NOT NULL,
        email           VARCHAR(32) NOT NULL,
        real_name       VARCHAR(32) NOT NULL,
        street          VARCHAR(48) NOT NULL,
        zip             VARCHAR(16),
        town            VARCHAR(32) NOT NULL,
        country         CHAR(2) NOT NULL, /* country codes -- refer to
ISO-3166*/
        phone           VARCHAR(32) NOT NULL,
        fax             VARCHAR(32),
        access          INTEGER NOT NULL,
        institute       VARCHAR(48) REFERENCES institute_t
                ON UPDATE CASCADE
                ON DELETE SET NULL
                DEFERRABLE
                INITIALLY DEFERRED
);
COMMIT;


of course I get the ERROR, that admin_t doesn't exist. So? help the stupid!
pls!

best greets,
Chris

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