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Re: [PATCH] Support for foreign keys with arrays

From: Gabriele Bartolini <gabriele(dot)bartolini(at)2ndQuadrant(dot)it>
To: Noah Misch <noah(at)leadboat(dot)com>
Cc: Marco Nenciarini <marco(dot)nenciarini(at)2ndQuadrant(dot)it>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH] Support for foreign keys with arrays
Date: 2012-01-31 15:55:42
Message-ID: 4F280EFE.1080604@2ndQuadrant.it (view raw or flat)
Thread:
Lists: pgsql-hackers
Hi Noah,

Il 21/01/12 21:42, Noah Misch ha scritto:
> On Sat, Jan 14, 2012 at 08:18:48PM +0100, Marco Nenciarini wrote:
> I greatly like that name; it would still make sense for other 
> aggregate types, should we ever expand its use. Please complete the 
> name change: the documentation, catalog entries, etc should all call 
> them something like "each foreign key constraints" (I don't 
> particularly like that exact wording).
Ok, we'll go with "EACH Foreign Key Constraints" but I would allow the 
synonym "Foreign Key Array", especially in the documentation.
> How about: FOREIGN KEY(col_a, EACH col_b, col_c) REFERENCES pktable 
> (a, b, c)
We really like this syntax. However, as also Simon suggested, we'd go 
for switching to this syntax, but stick to a simpler implementation for 
9.2. We will then be able to expand the functionality, by keeping the 
same syntax, from 9.3.
> To complete the ARRAY -> EACH transition, I would suggest names like 
> CASCADE EACH/SET EACH NULL.
Sounds perfect.

Marco will go through all your comments and will send version 3 shortly.

Thank you,
Gabriele

-- 
  Gabriele Bartolini - 2ndQuadrant Italia
  PostgreSQL Training, Services and Support
  gabriele(dot)bartolini(at)2ndQuadrant(dot)it | www.2ndQuadrant.it


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