REFERENCES

From: Andre Schubert <andre(dot)schubert(at)km3(dot)de>
To: pgsql-sql(at)postgresql(dot)org
Subject: REFERENCES
Date: 2002-03-13 10:53:29
Message-ID: 3C8F2FA9.EF9C2710@km3.de
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Hi to all,

i have a simple problem and wont request assistance fro m this list.
i have to tables

foo:
id int8 UNIQUE

bar:
id int8 UNIQUE
foo_id int8

Now i wont foo_id to be a id which exists in the foo, this could be done
with foo_id REFERENCES foo (id).
But what should i do if i want foo_id to be a id existing in foo or to
be zero(0).
I have created a view as "select id from foo UNION select 0" and tried
to REFERENCE against this view, but that
doesnt work.
Can this problem be solved by a somebody ????

Thanks

--
Andre Schubert EMail: Andre(dot)Schubert(at)km3(dot)de
Tel: 03774 6625-78
km3 teledienst GmbH Fax: 03774 6625-79

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