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Re: [PATCH] Support for foreign keys with arrays

From: Merlin Moncure <mmoncure(at)gmail(dot)com>
To: Gabriele Bartolini <gabriele(dot)bartolini(at)2ndquadrant(dot)it>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Marco Nenciarini <marco(dot)nenciarini(at)2ndquadrant(dot)it>
Subject: Re: [PATCH] Support for foreign keys with arrays
Date: 2011-11-21 16:30:16
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On Fri, Nov 4, 2011 at 7:48 AM, Gabriele Bartolini
<gabriele(dot)bartolini(at)2ndquadrant(dot)it> wrote:
> This patch adds basic support of arrays in foreign keys, by allowing to
> define a referencing column as an array of elements having the same type as
> the referenced column in the referenced table.
> Every NOT NULL element in the referencing array is matched against the
> referenced table.

I like the idea of being able to define more flexible foreign keys,
but are we gilding the lily here?  The proposed solution is really
quite specific to the nuances of arrays.  Perhaps there is a more
general expression based syntax that leaves the door open for other
types conditions such as dealing fields dependent on other fields?


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