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Re: DROP CONSTRAINT (UNIQUE) preliminary support

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>
Cc: Patches <pgsql-patches(at)postgresql(dot)org>
Subject: Re: DROP CONSTRAINT (UNIQUE) preliminary support
Date: 2001-06-12 17:37:39
Message-ID: 200106121737.f5CHbdC25410@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-patches
How are we doing on this patch?

> Hi all,
> 
> This patch allows ALTER TABLE/DROP CONSTRAINT to drop UNIQUE constraints by
> dropping the relevant index.
> 
> This is a prelim patch that I need comment on (The @@ comments), and I've
> edited some things out by hand, so I don't recommend applying it to anything
> just yet.
> 
> I have added an IsIndex function to indexcmds.c and a RemoveUniqueConstraint
> to heap.c, plus modified command.c's AlterTableDropConstraint function to
> call RemoveUniqueConstraint.
> 
> Note that I have disabled inheritance support for unique constraints - since
> it's impossible to have two indices of the same name anyway...
> 
> Comments please.
> 
> Chris

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-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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